feat(can): Add CAN ID definitions

This commit introduces the CAN ID definitions for the irrigation system.
It defines the structure of the CAN IDs and macros for priority and function.
Signed-off-by: Eduard Iten <eduard@iten.pro>

.gemini_commit_message.txt

@@ -0,0 +1,7 @@
+feat(modbus): Implement persistent and improved reconfiguration for Modbus server
+
+This commit enhances the Modbus server's configuration handling by:
+
+- Loading saved baudrate and unit ID settings during initialization, ensuring persistence across reboots.
+- Providing improved feedback during `modbus_reconfigure`, including logging for successful changes and informing the user when a device restart is required for changes to take effect.
+- Saving new configuration settings even if immediate reinitialization fails, allowing them to be applied on the next boot.

.gitignore

@@ -1 +1,65 @@
 **/build
+
+# Zephyr build directories
+build/
+build-*/
+*/build/
+**/build/
+
+# Zephyr out-of-tree build directories
+out-of-tree-build/
+
+# Files generated by the build system
+zephyr.elf
+zephyr.bin
+zephyr.hex
+zephyr.map
+zephyr.strip
+zephyr.lst
+zephyr.asm
+zephyr.stat
+zephyr.a
+zephyr.o
+*.o
+*.a
+*.so
+*.so.*
+*.dll
+*.exe
+
+# Cmake
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+CTestTestfile.cmake
+compile_commands.json
+
+# Kconfig generated files
+.config
+.config.old
+autoconf.h
+
+# Doxygen
+doxygen/
+
+# west
+.west/
+west.yml.bak
+
+# Editor-specific files
+.vscode/
+.idea/
+*.swp
+*~
+*.bak
+*.orig
+
+# Python
+__pycache__/
+*.pyc
+
+# Mac OS X
+.DS_Store
+
+# Windows
+Thumbs.db

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "software/modules/zephyr_vnd7050aj_driver"]
+	path = software/modules/zephyr_vnd7050aj_driver
+	url = https://gitea.iten.pro/edi/zephyr_vnd7050aj_driver.git

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "files.associations": {
+        "fwu.h": "c"
+    }
+}

.vscode/tasks.json

@@ -0,0 +1,14 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "shell",
+			"label": "Build Zephyr app",
+			"command": "west build -b weact_stm32g431_core .",
+			"group": "build",
+			"problemMatcher": [
+				"$gcc"
+			]
+		}
+	]
+}

docs/concept.de.md

@@ -39,7 +39,7 @@ Die Slave-Nodes sind die Arbeitseinheiten im Feld. Um bei der Fertigung kleiner
 
 * **Mikrocontroller:** Ein `STM32G431PB`. Dieser ist zwar leistungsstark, bietet aber alle nötigen Peripherien (mehrere UARTs, ADCs, CAN) und ermöglicht ein einheitliches Hardware- und Software-Design.
 * **Peripherie pro Node:**
-    * **Zwei High-Side Ausgänge (+12V):** Realisiert über einen `VND7050AJ`. Perfekt zur Ansteuerung der 12V-Motorventile (`Öffnen`/`Schliessen`). Die `Sense`-Leitung des Treibers wird über einen AD-Wandler ausgelesen, um durch Messung des Motorstroms eine Endlagen-Erkennung ohne physische Endschalter zu realisieren (Motorstrom im Stillstand ≈ 0).
+    * **Zwei High-Side Ausgänge (+12V):** Realisiert über einen `VND7050AJ`. Perfekt zur Ansteuerung der 12V-Motorventile (`Öffnen`/`Schliessen`). Die `Sense`-Leitung des Treibers wird über einen AD-Wandler ausgelesen, um durch Messung des Motorstroms eine Endlagen-Erkennung ohne physische Endschalter zu realisieren (Motorstrom im Stillstand ≈ 0). Zusätzlich können die Temperatur und die Versorgungsspannung des Treibers ausgelesen werden.
     * **Zwei Low-Side Ausgänge (0V):** Über N-Kanal-MOSFETs geschaltete Ausgänge. Nutzbar zur Ansteuerung von 12V-LEDs in Tastern oder zum Schalten des Halbleiter-Relais für die Pumpe.
     * **Zwei digitale Eingänge:** Direkte, geschützte Eingänge am Controller zum Anschluss von Tastern oder den kapazitiven NPN-Sensoren.
 

docs/modbus-registers.de.md

@@ -29,32 +29,38 @@ Alle Register sind in einer einzigen, durchgehenden Liste pro Register-Typ (`Inp
 
 | Adresse (hex) | Name                           | Zugehörigkeit     | Beschreibung                                                                                                                              |
 | :------------ | :----------------------------- | :---------------- | :---------------------------------------------------------------------------------------------------------------------------------------- |
-| **0x0000** | `VENTIL_ZUSTAND_BEWEGUNG`        | Ventil            | Kombiniertes Status-Register. **High-Byte**: Bewegung (`0`=Idle, `1`=Öffnet, `2`=Schliesst, `3`=Fehler). **Low-Byte**: Zustand (`0`=Geschlossen, `1`=Geöffnet). |
-| **0x0001** | `MOTORSTROM_MA`                | Ventil            | Aktueller Motorstrom in Milliampere (mA).                                                                                                 |
-| **0x0020** | `DIGITAL_EINGAENGE_ZUSTAND`    | Eingänge          | Bitmaske der digitalen Eingänge. Bit 0: Eingang 1, Bit 1: Eingang 2. `1`=Aktiv.                                                          |
-| **0x0021** | `TASTER_EVENTS`                | Eingänge          | Event-Flags für Taster (Clear-on-Read). Bit 0: Taster 1 gedrückt. Bit 1: Taster 2 gedrückt.                                                 |
-| **0x00F0** | `FIRMWARE_VERSION_MAJOR_MINOR` | System            | z.B. `0x0102` für v1.2.                                                                                                                   |
-| **0x00F1** | `FIRMWARE_VERSION_PATCH`       | System            | z.B. `3` für v1.2.3.                                                                                                                      |
-| **0x00F2** | `DEVICE_STATUS`                | System            | `0`=OK, `1`=Allgemeiner Fehler.                                                                                                           |
-| **0x00F3** | `UPTIME_SECONDS_LOW`           | System            | Untere 16 Bit der Uptime in Sekunden.                                                                                                     |
-| **0x00F4** | `UPTIME_SECONDS_HIGH`          | System            | Obere 16 Bit der Uptime.                                                                                                                  |
-| **0x0100** | `FWU_LAST_CHUNK_CRC`           | Firmware-Update   | Enthält den CRC16 des zuletzt im Puffer empfangenen Daten-Chunks.                                                                         |
+| **0x0000** | `VALVE_STATE_MOVEMENT`        | Ventil            | Kombiniertes Status-Register. **High-Byte**: Bewegung (`0`=Idle, `1`=Öffnet, `2`=Schliesst, `3`=Fehler). **Low-Byte**: Zustand (`0`=Geschlossen, `1`=Geöffnet). |
+| **0x0001** | `REG_INPUT_MOTOR_OPEN_CURRENT_MA`           | Ventil            | Motorstrom beim Öffnen in Milliampere (mA).                                                                                               |
+| **0x0002** | `REG_INPUT_MOTOR_CLOSE_CURRENT_MA`          | Ventil            | Motorstrom beim Schließen in Milliampere (mA).                                                                                            |
+| **0x0020** | `REG_INPUT_DIGITAL_INPUTS_STATE`    | Eingänge          | Bitmaske der digitalen Eingänge. Bit 0: Eingang 1, Bit 1: Eingang 2. `1`=Aktiv.                                                          |
+| **0x0021** | `REG_INPUT_BUTTON_EVENTS`                | Eingänge          | Event-Flags für Taster (Clear-on-Read). Bit 0: Taster 1 gedrückt. Bit 1: Taster 2 gedrückt.                                                 |
+| **0x00F0** | `REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR` | System            | z.B. `0x0102` für v1.2.                                                                                                                   |
+| **0x00F1** | `REG_INPUT_FIRMWARE_VERSION_PATCH`       | System            | z.B. `3` für v1.2.3.                                                                                                                      |
+| **0x00F2** | `REG_INPUT_DEVICE_STATUS`                | System            | `0`=OK, `1`=Allgemeiner Fehler.                                                                                                           |
+| **0x00F3** | `REG_INPUT_UPTIME_SECONDS_LOW`           | System            | Untere 16 Bit der Uptime in Sekunden.                                                                                                     |
+| **0x00F4** | `REG_INPUT_UPTIME_SECONDS_HIGH`          | System            | Obere 16 Bit der Uptime.                                                                                                                  |
+| **0x00F5** | `REG_INPUT_SUPPLY_VOLTAGE_MV`            | System            | Aktuelle Versorgungsspannung in Millivolt (mV).                                                                                           |
+| **0x0100** | `REG_INPUT_FWU_LAST_CHUNK_CRC`           | Firmware-Update   | Enthält den CRC16 des zuletzt im Puffer empfangenen Daten-Chunks.                                                                         |
 
 ## 3. Holding Registers (4xxxx, Read/Write)
 
 | Adresse (hex) | Name                          | Zugehörigkeit     | Beschreibung                                                                                                                              |
 | :------------ | :---------------------------- | :---------------- | :---------------------------------------------------------------------------------------------------------------------------------------- |
-| **0x0000** | `VENTIL_BEFEHL`               | Ventil            | `1`=Öffnen, `2`=Schliessen, `0`=Bewegung stoppen.                                                                                           |
-| **0x0001** | `MAX_OEFFNUNGSZEIT_S`         | Ventil            | Sicherheits-Timeout in Sekunden für den Öffnen-Vorgang.                                                                                    |
-| **0x0002** | `MAX_SCHLIESSZEIT_S`          | Ventil            | Sicherheits-Timeout in Sekunden für den Schliessen-Vorgang.                                                                                |
-| **0x0010** | `DIGITAL_AUSGAENGE_ZUSTAND`   | Ausgänge          | Bitmaske zum Lesen und Schreiben der Ausgänge. Bit 0: Ausgang 1, Bit 1: Ausgang 2. `1`=AN, `0`=AUS.                                         |
-| **0x00F0** | `WATCHDOG_TIMEOUT_S`          | System            | Timeout des Fail-Safe-Watchdogs in Sekunden. `0`=Deaktiviert.                                                                             |
-| **0x00F1** | `DEVICE_RESET`                | System            | Schreibt `1` um das Gerät neu zu starten.                                                                                                 |
-| **0x0100** | `FWU_COMMAND`                 | Firmware-Update   | `1`: **Verify Chunk**: Der zuletzt übertragene Chunk wurde vom Client als gültig befunden. Der Slave soll ihn nun ins Flash schreiben. `2`: **Finalize Update**: Alle Chunks sind übertragen. Installation abschliessen und neu starten. |
-| **0x0101** | `FWU_CHUNK_OFFSET_LOW`        | Firmware-Update   | Untere 16 Bit des 32-Bit-Offsets, an den der nächste Chunk geschrieben werden soll.                                                         |
-| **0x0102** | `FWU_CHUNK_OFFSET_HIGH`       | Firmware-Update   | Obere 16 Bit des 32-Bit-Offsets.                                                                                                          |
-| **0x0103** | `FWU_CHUNK_SIZE`              | Firmware-Update   | Grösse des nächsten Chunks in Bytes (max. 256).                                                                                           |
-| **0x0180** | `FWU_DATA_BUFFER`             | Firmware-Update   | **Startadresse** eines 128x16-bit Puffers (256 Bytes). Entspricht den Registern `40384` bis `40511`.                                       |
+| **0x0000** | `REG_HOLDING_VALVE_COMMAND`               | Ventil            | `1`=Öffnen, `2`=Schliessen, `0`=Bewegung stoppen.                                                                                           |
+| **0x0001** | `REG_HOLDING_MAX_OPENING_TIME_S`         | Ventil            | Sicherheits-Timeout in Sekunden für den Öffnen-Vorgang.                                                                                    |
+| **0x0002** | `REG_HOLDING_MAX_CLOSING_TIME_S`          | Ventil            | Sicherheits-Timeout in Sekunden für den Schliessen-Vorgang.                                                                                |
+| **0x0003** | `REG_HOLDING_END_CURRENT_THRESHOLD_OPEN_MA` | Ventil            | Minimaler Stromschwellenwert in mA zur Endlagenerkennung beim Öffnen.                                                                     |
+| **0x0004** | `REG_HOLDING_END_CURRENT_THRESHOLD_CLOSE_MA` | Ventil            | Minimaler Stromschwellenwert in mA zur Endlagenerkennung beim Schliessen.                                                                |
+| **0x0005** | `REG_HOLDING_OBSTACLE_THRESHOLD_OPEN_MA` | Ventil            | Stromschwellenwert in mA für die Hinderniserkennung beim Öffnen.                                                                    |
+| **0x0006** | `REG_HOLDING_OBSTACLE_THRESHOLD_CLOSE_MA` | Ventil            | Stromschwellenwert in mA für die Hinderniserkennung beim Schließen.                                                                    |
+| **0x0010** | `REG_HOLDING_DIGITAL_OUTPUTS_STATE`   | Ausgänge          | Bitmaske zum Lesen und Schreiben der Ausgänge. Bit 0: Ausgang 1, Bit 1: Ausgang 2. `1`=AN, `0`=AUS.                                         |
+| **0x00F0** | `REG_HOLDING_WATCHDOG_TIMEOUT_S`          | System            | Timeout des Fail-Safe-Watchdogs in Sekunden. `0`=Deaktiviert.                                                                             |
+| **0x00F1** | `REG_HOLDING_DEVICE_RESET`                | System            | Schreibt `1` um das Gerät neu zu starten.                                                                                                 |
+| **0x0100** | `REG_HOLDING_FWU_COMMAND`                 | Firmware-Update   | `1`: **Verify Chunk**: Der zuletzt übertragene Chunk wurde vom Client als gültig befunden. Der Slave soll ihn nun ins Flash schreiben. `2`: **Finalize Update**: Alle Chunks sind übertragen. Installation abschliessen und neu starten. |
+| **0x0101** | `REG_HOLDING_FWU_CHUNK_OFFSET_LOW`        | Firmware-Update   | Untere 16 Bit des 32-Bit-Offsets, an den der nächste Chunk geschrieben werden soll.                                                         |
+| **0x0102** | `REG_HOLDING_FWU_CHUNK_OFFSET_HIGH`       | Firmware-Update   | Obere 16 Bit des 32-Bit-Offsets.                                                                                                          |
+| **0x0103** | `REG_HOLDING_FWU_CHUNK_SIZE`              | Firmware-Update   | Grösse des nächsten Chunks in Bytes (max. 256).                                                                                           |
+| **0x0180** | `REG_HOLDING_FWU_DATA_BUFFER`             | Firmware-Update   | **Startadresse** eines 128x16-bit Puffers (256 Bytes). Entspricht den Registern `40384` bis `40511`.                                       |
 
 ## 4. Detaillierter Firmware-Update-Prozess
 
@@ -79,10 +85,10 @@ Diese Register gehören zum externen Füllstandsensor und können auf dem Bus eb
 
 | Adresse (hex) | Name                       | R/W | Beschreibung                                                                                                                              |
 | :------------ | :------------------------- | :-- | :---------------------------------------------------------------------------------------------------------------------------------------- |
-| **0x0000** | `NODE_ADRESSE`             | R/W | Geräteadresse des Sensors (1-255).                                                                                                        |
+| **0x0000** | `NODE_ADDRESS`             | R/W | Geräteadresse des Sensors (1-255).                                                                                                        |
 | **0x0001** | `BAUDRATE`                 | R/W | `0`=1200, `1`=2400, `2`=4800, `3`=9600, `4`=19200, `5`=38400, `6`=57600, `7`=115200.                                                       |
-| **0x0002** | `EINHEIT`                  | R/W | `0`=Keine, `1`=cm, `2`=mm, `3`=MPa, `4`=Pa, `5`=kPa.                                                                                        |
-| **0x0003** | `NACHKOMMASTELLEN`         | R/W | Anzahl der Dezimalstellen für den Messwert (0-3).                                                                                         |
-| **0x0004** | `MESSWERT_AKTUELL`         | R   | Der skalierte Messwert als vorzeichenbehafteter 16-Bit-Integer.                                                                           |
-| **0x0005** | `MESSBEREICH_NULLPUNKT`    | R/W | Rohwert für den Nullpunkt der Skala.                                                                                                      |
-| **0x0006** | `MESSBEREICH_ENDPUNKT`     | R/W | Rohwert für den Endpunkt der Skala.                                                                                                       |
+| **0x0002** | `UNIT`                  | R/W | `0`=Keine, `1`=cm, `2`=mm, `3`=MPa, `4`=Pa, `5`=kPa.                                                                                        |
+| **0x0003** | `DECIMAL_PLACES`         | R/W | Anzahl der Dezimalstellen für den Messwert (0-3).                                                                                         |
+| **0x0004** | `CURRENT_MEASUREMENT`         | R   | Der skalierte Messwert als vorzeichenbehafteter 16-Bit-Integer.                                                                           |
+| **0x0005** | `MEASUREMENT_RANGE_ZERO_POINT`    | R/W | Rohwert für den Nullpunkt der Skala.                                                                                                      |
+| **0x0006** | `MEASUREMENT_RANGE_END_POINT`     | R/W | Rohwert für den Endpunkt der Skala.                                                                                                       |

docs/planning.de.md

@@ -9,11 +9,13 @@
 | ✅ | **Phase 0: Planung & Definition** | | |
 | ✅ | Konzept erstellen und finalisieren | 30.06.2025 | Architektur, Komponenten und grundlegende Architektur sind festgelegt. |
 | ✅ | MODBUS Register Map definieren | 30.06.2025 | Die "API" der Slaves ist definiert und bildet die Grundlage für die Software-Entwicklung. |
+| ✅ | Header- und deutsche Dokumentation aktualisiert | 10.07.2025 | Doxygen-Kommentare in Headern und deutsche .md-Dateien auf den neuesten Stand gebracht und übersetzt. |
 | ☐ | **Phase 1: Slave-Node Prototyp (STM32 Eval-Board)** | | **Ziel:** Ein einzelner Slave wird auf dem Eval-Board zum Leben erweckt. |
 | ✅ | 1.1 Entwicklungsumgebung für STM32/Zephyr einrichten | 30.06.2025 | Toolchain, VS Code, Zephyr-SDK, MCUBoot etc. installieren und ein "Hello World" zum Laufen bringen. |
-| ☐ | 1.2 Basis-Firmware für Slave-Node erstellen | | Hardware-Abstraktion (GPIOs, ADC, UART für RS485) implementieren. |
-| ☐ | 1.3 MODBUS-RTU Stack auf dem Slave implementieren | | Basierend auf der definierten Register-Map. Zuerst nur lesende Funktionen (Status, Version). |
-| ☐ | 1.4 Kernlogik implementieren (z.B. Ventilsteuerung) | | Umsetzung der `VENTIL_ZUSTAND_BEWEGUNG` Logik, Strommessung für Endlagen etc. |
+| ✅ | 1.2 Hardware-Abstraktion (VND7050AJ, RS485) | 10.07.2025 | Implementierung der Treiber für den VND7050AJ und die RS485-Kommunikation. |
+| ✅ | 1.3 Basis-Firmware für Slave-Node erstellen | 10.07.2025 | Hardware-Abstraktion (GPIOs) implementiert. |
+| ✅ | 1.3 MODBUS-RTU Stack auf dem Slave implementieren | 10.07.2025 | Basierend auf der definierten Register-Map. Zuerst nur lesende Funktionen (Status, Version). |
+| ✅ | 1.4 Kernlogik implementieren (z.B. Ventilsteuerung) | 10.07.2025 | Umsetzung der `VALVE_STATE_MOVEMENT` Logik, Strommessung für Endlagen etc. |
 | ☐ | **Phase 2: Verifikation der Slave-Firmware** | | **Ziel:** Nachweisen, dass der Slave sich exakt an die MODBUS-Spezifikation hält. |
 | ☐ | 2.1 Slave-Node mit PC via USB-MODBUS-Adapter testen | | **Kritischer Meilenstein.** Mit Tools wie "QModMaster" oder einem Python-Skript die Register lesen & schreiben. Die Slave-Firmware wird so unabhängig vom Gateway validiert. |
 | ☐ | 2.2 Firmware-Update Mechanismus testen | | Den kompletten Update-Prozess (Chunking, CRC-Check) mit einem Skript vom PC aus testen. Der Slave schreibt die Firmware dabei vorerst nur in einen ungenutzten RAM-Bereich. |

setup-format-hook.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# This script sets up a Git pre-commit hook to automatically format C/C++ files
+# in the 'software/' subdirectory using clang-format.
+
+# Define the path for the pre-commit hook
+HOOK_DIR=".git/hooks"
+HOOK_FILE="$HOOK_DIR/pre-commit"
+
+# Create the hooks directory if it doesn't exist
+mkdir -p "$HOOK_DIR"
+
+# Create the pre-commit hook script using a 'here document'
+cat > "$HOOK_FILE" << 'EOF'
+#!/bin/sh
+
+# --- Pre-commit hook for clang-format ---
+#
+# This hook formats staged C, C++, and Objective-C files in the 'software/'
+# subdirectory before a commit is made.
+# It automatically finds the .clang-format file in the software/ directory.
+#
+
+# Directory to be formatted
+TARGET_DIR="software/"
+
+# Use git diff to find staged files that are Added (A), Copied (C), or Modified (M).
+# We filter for files only within the TARGET_DIR.
+# The grep regex matches common C/C++ and Objective-C file extensions.
+FILES_TO_FORMAT=$(git diff --cached --name-only --diff-filter=ACM "$TARGET_DIR" | grep -E '\.(c|h|cpp|hpp|cxx|hxx|cc|hh|m|mm)$')
+
+if [ -z "$FILES_TO_FORMAT" ]; then
+    # No relevant files to format, exit successfully.
+    exit 0
+fi
+
+echo "› Running clang-format on staged files in '$TARGET_DIR'..."
+
+# Run clang-format in-place on the identified files.
+# clang-format will automatically find the .clang-format file in the software/ directory
+# or any of its parent directories.
+echo "$FILES_TO_FORMAT" | xargs clang-format -i
+
+# Since clang-format may have changed the files, we need to re-stage them.
+echo "$FILES_TO_FORMAT" | xargs git add
+
+echo "› Formatting complete."
+
+exit 0
+EOF
+
+# Make the hook executable
+chmod +x "$HOOK_FILE"
+
+echo "✅ Git pre-commit hook has been set up successfully."
+echo "   It will now automatically format files in the '$PWD/software' directory before each commit."

software/.clang-format

@@ -0,0 +1,142 @@
+# Zephyr Project .clang-format configuration
+# Based on Linux kernel style with Zephyr-specific adaptations
+
+# Use LLVM as the base style and customize from there
+BasedOnStyle: LLVM
+
+# Language settings
+Language: Cpp
+
+# Indentation settings
+IndentWidth: 8
+TabWidth: 8
+UseTab: ForIndentation
+
+# Line length
+ColumnLimit: 100
+
+# Brace settings
+BreakBeforeBraces: Linux
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: false
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterStruct: true
+  AfterUnion: true
+  BeforeCatch: true
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+
+# Always add braces for control statements (Zephyr requirement)
+RemoveBracesLLVM: false
+
+# Control statement settings
+SpaceBeforeParens: ControlStatements
+SpacesInParentheses: false
+
+# Function settings
+AllowShortFunctionsOnASingleLine: None
+AllowShortBlocksOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLoopsOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+
+# Pointer and reference alignment
+PointerAlignment: Right
+ReferenceAlignment: Right
+
+# Spacing settings
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInSquareBrackets: false
+
+# Alignment settings
+AlignAfterOpenBracket: DontAlign
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Right
+AlignOperands: false
+AlignTrailingComments: false
+
+# Breaking settings
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: false
+BinPackParameters: false
+BreakBeforeBinaryOperators: None
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: false
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: true
+
+# Penalties (used for line breaking decisions)
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+
+# Comment settings
+ReflowComments: true
+CommentPragmas: '^ IWYU pragma:'
+
+# Sorting settings
+SortIncludes: true
+SortUsingDeclarations: true
+
+# Preprocessor settings
+IndentPPDirectives: None
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+
+# Misc settings
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat: false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros: ['LISTIFY', 'FOR_EACH', 'FOR_EACH_FIXED_ARG', 'FOR_EACH_IDX', 'FOR_EACH_IDX_FIXED_ARG', 'FOR_EACH_NONEMPTY_TERM', 'Z_FOR_EACH', 'Z_FOR_EACH_FIXED_ARG', 'Z_FOR_EACH_IDX', 'Z_FOR_EACH_IDX_FIXED_ARG']
+IncludeBlocks: Preserve
+IncludeCategories:
+  - Regex: '^<zephyr/.*\.h>'
+    Priority: 1
+  - Regex: '^<.*\.h>'
+    Priority: 2
+  - Regex: '^<.*'
+    Priority: 3
+  - Regex: '.*'
+    Priority: 4
+IndentCaseLabels: false
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBinPackProtocolList: Auto
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true

software/.vscode/settings.json

@@ -1,12 +1,15 @@
 {
-        // Hush CMake
-		"cmake.configureOnOpen": false,
-
-		// IntelliSense
-		"C_Cpp.default.compilerPath": "${userHome}/zephyr-sdk-0.17.1/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe",
-		"C_Cpp.default.compileCommands": "${workspaceFolder}/build/compile_commands.json",
-
-		// File Associations
-		"files.associations": {
-		}
+	// Hush CMake
+	"cmake.configureOnOpen": false,
+	// IntelliSense
+	"C_Cpp.default.compilerPath": "${userHome}/zephyr-sdk-0.17.1/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe",
+	"C_Cpp.default.compileCommands": "${workspaceFolder}/build/compile_commands.json",
+	// File Associations
+	"files.associations": {
+		"app_version.h": "c"
+	},
+	"C_Cpp.clang_format_style": "file",
+	"nrf-connect.applications": [
+		"${workspaceFolder}/apps/slave_node"
+	],
 }

software/.vscode/tasks.json

@@ -2,32 +2,20 @@
 	"version": "2.0.0",
 	"tasks": [
 		{
-			"label": "West Build",
-			"type": "shell",
-			"group": {
-				"kind": "build",
-				"isDefault": true
-			},
-			"linux": {
-				"command": "${userHome}/zephyrproject/.venv/bin/west"
-			},
-			"windows": {
-				"command": "${userHome}/zephyrproject/.venv/Scripts/west.exe"
-			},
-			"osx": {
-				"command": "${userHome}/zephyrproject/.venv/bin/west"
-			},
-			"args": [
-				"build",
-				"-p",
-				"auto",
-				"-b",
-				"valve_node"
-			],
-			"problemMatcher": [
-				"$gcc"
-			]
-		},
+            "label": "Format All C/C++ Files",
+            "type": "shell",
+            "command": "find . -name \"*.c\" -o -name \"*.h\" | xargs clang-format -i",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "silent",
+                "clear": true,
+                "panel": "shared"
+            }
+        },
 		{
 			"label": "West Configurable Build",
 			"type": "shell",

software/CMakeLists.txt

@@ -1,8 +0,0 @@
-cmake_minimum_required(VERSION 3.13.1)
-
-project(software)
-
-add_subdirectory(modules/modbus_server)
-add_subdirectory(modules/valve)
-add_subdirectory(modules/fwu)
-add_subdirectory(apps/stm32g431_tests)

software/Kconfig

@@ -0,0 +1 @@
+rsource "lib/Kconfig"

software/apps/bl_test/CMakeLists.txt

@@ -1,6 +1,7 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.20.0)
 
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
-project(stm32g431_tests)
+project(bl_test)
 
+# Add application source files
 target_sources(app PRIVATE src/main.c)

software/apps/bl_test/VERSION

@@ -0,0 +1,5 @@
+VERSION_MAJOR = 0
+VERSION_MINOR = 0
+PATCHLEVEL = 1
+VERSION_TWEAK = 1
+EXTRAVERSION = devel

software/apps/bl_test/prj.conf

@@ -0,0 +1,46 @@
+# Enable Console and printk for logging via UART
+CONFIG_CONSOLE=y
+CONFIG_LOG=y
+CONFIG_UART_CONSOLE=y
+
+# Enable more detailed MCUMGR logging
+CONFIG_MCUMGR_LOG_LEVEL_DBG=y
+CONFIG_IMG_MANAGER_LOG_LEVEL_DBG=y
+CONFIG_STREAM_FLASH_LOG_LEVEL_DBG=y
+
+# Enable USB for MCUMGR only
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_CDC_ACM=y
+CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=y
+
+# USB CDC ACM buffer configuration for better MCUMGR performance
+CONFIG_USB_CDC_ACM_RINGBUF_SIZE=1024
+
+# Set log level to info for reasonable size
+CONFIG_LOG_DEFAULT_LEVEL=3
+
+# Enable MCUMGR info logging (not debug to save space)
+CONFIG_MCUMGR_LOG_LEVEL_INF=y
+
+# Enable USB CDC info logging
+CONFIG_USB_CDC_ACM_LOG_LEVEL_INF=y
+
+# STEP 5.2 - Enable mcumgr DFU in application
+# Enable MCUMGR 
+CONFIG_MCUMGR=y  # Enable MCUMGR management for both OS and Images
+CONFIG_MCUMGR_GRP_OS=y
+CONFIG_MCUMGR_GRP_IMG=y  
+
+# Configure MCUMGR transport to UART (will use USB-CDC via chosen device)
+CONFIG_MCUMGR_TRANSPORT_UART=y
+
+# Dependencies
+# Configure dependencies for CONFIG_MCUMGR 
+CONFIG_NET_BUF=y
+CONFIG_ZCBOR=y
+CONFIG_CRC=y  # Configure dependencies for CONFIG_MCUMGR_GRP_IMG 
+CONFIG_FLASH=y
+CONFIG_IMG_MANAGER=y  # Configure dependencies for CONFIG_IMG_MANAGER 
+CONFIG_STREAM_FLASH=y
+CONFIG_FLASH_MAP=y  # Configure dependencies for CONFIG_MCUMGR_TRANSPORT_USB_CDC 
+CONFIG_BASE64=y

software/apps/bl_test/src/main.c

@@ -0,0 +1,11 @@
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <app_version.h>
+
+LOG_MODULE_REGISTER(bl_test_app, LOG_LEVEL_INF);
+
+int main(void)
+{
+	LOG_INF("Hello World from bl_test! This is version %s", APP_VERSION_EXTENDED_STRING);
+	return 0;
+}

software/apps/bl_test/sysbuild.conf

@@ -0,0 +1 @@
+SB_CONFIG_BOOTLOADER_MCUBOOT=y

software/apps/bl_test/sysbuild/bl_test.overlay

@@ -0,0 +1,9 @@
+#include "common.dtsi"
+
+/* Application Configuration - Firmware wird in slot0_partition geschrieben */
+/ {
+	chosen {
+		zephyr,code-partition = &slot0_partition;
+		zephyr,uart-mcumgr = &cdc_acm_uart0;
+	};
+};

software/apps/bl_test/sysbuild/common.dtsi

@@ -0,0 +1,94 @@
+/*
+ * Common Devicetree Configuration für weact_stm32g431_core
+ * - Konfiguriert einen W25Q128 Flash-Speicher auf SPI2
+ * - Konfiguriert USB-CDC für MCUMGR
+ * - Setzt den Chip Select (CS) Pin auf PA5
+ * - Weist das Label "flash1" zu
+ */
+
+/* Partitions für internes Flash (STM32G431) */
+&flash0 {
+	/delete-node/ partitions; /* Entferne die Standard-Partitionen */
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* MCUboot bootloader - 48 KB */
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x00000000 0x0000C000>;
+		};
+
+		/* Slot0 partition für primäres Application Image - 80 KB (20 sectors @ 4KB) */
+		slot0_partition: partition@C000 {
+			label = "image-0";
+			reg = <0x0000C000 0x00014000>;
+		};
+	};
+};
+
+/* USB-CDC Konfiguration für MCUMGR */
+&usb {
+	status = "okay";
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+	};
+};
+
+/ {
+	chosen {
+		zephyr,uart-mcumgr = &cdc_acm_uart0;
+	};
+};
+
+&spi2 {
+	/* Definiere die Pins für SCK, MISO, MOSI auf Port B */
+	pinctrl-0 = <&spi2_sck_pb13 &spi2_miso_pb14 &spi2_mosi_pb15>;
+	pinctrl-names = "default";
+	status = "okay";
+	
+	/* === Chip Select (CS) auf PA5 gesetzt === */
+	cs-gpios = <&gpioa 5 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+
+	/* Definiere den Flash-Chip als SPI NOR Gerät */
+	flash1: flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		label = "flash1";
+
+		/* JEDEC ID für einen Winbond W25Q128 (16 MBytes) */
+		jedec-id = [ef 40 18];
+
+		/* Speichergröße in Bytes (16 MBytes) */
+		size = <DT_SIZE_M(16)>;
+
+		/* Maximale Taktfrequenz - angepasst an STM32G431 Limits */
+		spi-max-frequency = <1000000>;
+
+		/* Partitions für externes Flash */
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			/* Slot1 partition für MCUboot (sekundäres Image) - 80 KB (20 sectors @ 4KB) */
+			slot1_partition: partition@0 {
+				label = "image-1";
+				reg = <0x00000000 0x00014000>;
+			};
+
+			/* Scratch partition für MCUboot - 80 KB (20 sectors @ 4KB) */
+			scratch_partition: partition@14000 {
+				label = "scratch";
+				reg = <0x00014000 0x00014000>;
+			};
+
+			/* Speicher partition für LittleFS - ~15.83 MB */
+			storage_partition: partition@28000 {
+				label = "storage";
+				reg = <0x00028000 0x00FD8000>;
+			};
+		};
+	};
+};

software/apps/bl_test/sysbuild/mcuboot.conf

@@ -0,0 +1,23 @@
+CONFIG_LOG=y
+CONFIG_MCUBOOT_LOG_LEVEL_INF=y
+
+# Enable UART console for MCUboot debug output
+CONFIG_UART_CONSOLE=y
+CONFIG_CONSOLE=y
+CONFIG_MCUBOOT_INDICATION_LED=y
+
+# Enable external SPI flash support
+CONFIG_SPI=y
+CONFIG_SPI_NOR=y
+CONFIG_SPI_NOR_SFDP_DEVICETREE=n
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_GPIO=y
+
+# Add SPI NOR specific configurations - use 4KB page size (required by driver)
+CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096
+CONFIG_SPI_NOR_INIT_PRIORITY=80
+
+# Set maximum image sectors manually since auto doesn't work with external flash
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=80

software/apps/bl_test/sysbuild/mcuboot.overlay

@@ -0,0 +1,8 @@
+#include "common.dtsi"
+
+/* MCUboot Configuration - Bootloader wird in boot_partition geschrieben */
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
+};

software/apps/can_node/CMakeLists.txt

@@ -1,6 +1,10 @@
 cmake_minimum_required(VERSION 3.20)
 
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
-project(hello_world)
+
+project(can_node LANGUAGES C)
+
+zephyr_include_directories(../../include)
+add_subdirectory(../../lib lib)
 
 target_sources(app PRIVATE src/main.c)

software/apps/can_node/Kconfig

@@ -0,0 +1,2 @@
+rsource "../../lib/Kconfig"
+source "Kconfig.zephyr"

software/apps/can_node/VERSION

@@ -0,0 +1,5 @@
+VERSION_MAJOR = 0
+VERSION_MINOR = 0
+PATCHLEVEL = 1
+VERSION_TWEAK = 1
+EXTRAVERSION = devel

software/apps/can_node/boards/bluepill_f103rb.conf

@@ -0,0 +1,7 @@
+# Disable UART console
+CONFIG_UART_CONSOLE=n
+
+# Enable RTT console
+CONFIG_RTT_CONSOLE=y
+CONFIG_USE_SEGGER_RTT=y
+CONFIG_SHELL_BACKEND_RTT=y

software/apps/can_node/boards/bluepill_f103rb.overlay

@@ -0,0 +1,43 @@
+/ {
+    chosen {
+        zephyr,console = &rtt;
+        zephyr,shell = &rtt;
+        zephyr,settings-partition = &storage_partition;
+    };
+
+    rtt: rtt {
+        compatible = "segger,rtt-uart";
+        #address-cells = <1>;
+        #size-cells = <0>;
+        label = "RTT";
+        status = "okay";
+    };
+};
+
+&flash0 {
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        /* Application partition starts at the beginning of flash */
+        slot0_partition: partition@0 {
+            label = "image-0";
+            reg = <0x00000000 DT_SIZE_K(120)>;
+        };
+
+        /* Use the last 8K for settings */
+        storage_partition: partition@1E000 {
+            label = "storage";
+            reg = <0x0001E000 DT_SIZE_K(8)>;
+        };
+    };
+};
+
+&usart1 {
+	modbus0 {
+		compatible = "zephyr,modbus-serial";
+		status = "okay";
+	};
+	status = "okay";
+};

software/apps/can_node/boards/native_sim.overlay

@@ -0,0 +1,47 @@
+/ {
+	aliases {
+		vnd7050aj = &vnd7050aj;
+	};
+
+	vnd7050aj: vnd7050aj {
+		compatible = "st,vnd7050aj";
+		status = "okay";
+
+		input0-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
+		input1-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
+		select0-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
+		select1-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
+		sense-enable-gpios = <&gpio0 5 GPIO_ACTIVE_HIGH>;
+		fault-reset-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
+		io-channels = <&adc0 0>;
+		r-sense-ohms = <1500>;
+		k-vcc = <4000>;
+	};
+
+	modbus_uart: uart_2 {
+		compatible = "zephyr,native-pty-uart";
+		status = "okay";
+		current-speed = <19200>;
+
+		modbus0: modbus0 {
+			compatible = "zephyr,modbus-serial";
+			status = "okay";
+		};
+	};
+
+};
+
+&adc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	ref-internal-mv = <3300>;
+	ref-external1-mv = <5000>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/can_node/boards/weact_stm32g431_core.overlay

@@ -0,0 +1,48 @@
+/ {
+	aliases {
+		vnd7050aj = &vnd7050aj;
+	};
+
+	vnd7050aj: vnd7050aj {
+		compatible = "st,vnd7050aj";
+		status = "okay";
+
+		input0-gpios = <&gpiob 3 GPIO_ACTIVE_HIGH>;
+		input1-gpios = <&gpiob 4 GPIO_ACTIVE_HIGH>;
+		select0-gpios = <&gpiob 0 GPIO_ACTIVE_HIGH>;
+		select1-gpios = <&gpiob 1 GPIO_ACTIVE_HIGH>;
+		sense-enable-gpios = <&gpiob 6 GPIO_ACTIVE_HIGH>;
+		fault-reset-gpios = <&gpiob 5 GPIO_ACTIVE_LOW>;
+		io-channels = <&adc1 1>;
+		r-sense-ohms = <1500>;
+		k-vcc = <4000>;
+	};
+};
+
+&adc1 {
+	status = "okay";
+	pinctrl-0 = <&adc1_in1_pa0>;
+	pinctrl-names = "default";
+	st,adc-clock-source = "SYNC";
+	st,adc-prescaler = <4>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};
+
+&usart1 {
+	modbus0 {
+		compatible = "zephyr,modbus-serial";
+		status = "okay";
+	};
+	status = "okay";
+    pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>; // PA9=TX, PA10=RX for Modbus communication
+    pinctrl-names = "default";
+};

software/apps/can_node/cdc-acm.overlay

@@ -0,0 +1,16 @@
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&zephyr_udc0 {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+
+		modbus0 {
+			compatible = "zephyr,modbus-serial";
+			status = "okay";
+		};
+	};
+};
+
+&usart1 {
+	/delete-node/ modbus0;
+};

software/apps/can_node/dts/bindings/st,vnd7050aj.yaml

@@ -0,0 +1,88 @@
+# Copyright (c) 2024, Eduard Iten
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+  STMicroelectronics VND7050AJ dual-channel high-side driver.
+  This is a GPIO and ADC controlled device.
+
+compatible: "st,vnd7050aj"
+
+include: base.yaml
+
+properties:
+  input0-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to control output channel 0.
+
+  input1-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to control output channel 1.
+
+  select0-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO for MultiSense selection bit 0.
+
+  select1-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO for MultiSense selection bit 1.
+
+  sense-enable-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to enable the MultiSense output.
+
+  fault-reset-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to reset a latched fault (active-low).
+
+  io-channels:
+    type: phandle-array
+    required: true
+    description: |
+      ADC channel connected to the MultiSense pin. This should be an
+      io-channels property pointing to the ADC controller and channel number.
+
+  r-sense-ohms:
+    type: int
+    required: true
+    description: |
+      Value of the external sense resistor connected from the MultiSense
+      pin to GND, specified in Ohms. This is critical for correct
+      conversion of the analog readings.
+
+  k-factor:
+    type: int
+    default: 1500
+    description: |
+      Factor between PowerMOS and SenseMOS.
+
+  k-vcc:
+    type: int
+    default: 8000
+    description: |
+      VCC sense ratio multiplied by 1000. Used for supply voltage calculation.
+
+  t-sense-0:
+    type: int
+    default: 25
+    description: |
+      Temperature sense reference temperature in degrees Celsius.
+
+  v-sense-0:
+    type: int
+    default: 2070
+    description: |
+      Temperature sense reference voltage in millivolts.
+
+  k-tchip:
+    type: int
+    default: -5500
+    description: |
+      Temperature sense gain coefficient multiplied by 1000.
+      Used for chip temperature calculation.
+

software/apps/can_node/overlay-cdc-acm.conf

@@ -0,0 +1,4 @@
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_DEVICE_PRODUCT="Modbus slave node"
+CONFIG_UART_LINE_CTRL=y
+CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n

software/apps/can_node/prj.conf

@@ -0,0 +1,31 @@
+# Enable Console and printk for logging
+CONFIG_CONSOLE=y
+CONFIG_LOG=y
+
+# Enable Shell
+CONFIG_SHELL=y
+CONFIG_REBOOT=y
+CONFIG_SHELL_MODBUS=n
+CONFIG_SHELL_VALVE=y
+CONFIG_SHELL_SYSTEM=y
+
+# Enable Settings Subsystem
+CONFIG_SETTINGS=y
+CONFIG_SETTINGS_NVS=y
+CONFIG_NVS=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+
+# Config modbus
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_MODBUS=y
+CONFIG_MODBUS_ROLE_SERVER=y
+CONFIG_MODBUS_LOG_LEVEL_DBG=y
+
+# enable Valve Driver
+CONFIG_LIB_VALVE=y
+CONFIG_LOG_VALVE_LEVEL=4
+
+# Enable VND7050AJ
+CONFIG_VND7050AJ=y

software/apps/can_node/src/main.c

@@ -0,0 +1,40 @@
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/settings/settings.h>
+#include <app_version.h>
+#include <lib/valve.h>
+#include <lib/vnd7050aj.h>
+
+LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
+
+int main(void)
+{
+	int rc;
+	LOG_INF("Starting Irrigation System CAN Node, Version %s", APP_VERSION_EXTENDED_STRING);
+
+	/* Initialize settings subsystem */
+	rc = settings_subsys_init();
+	if (rc != 0) {
+		LOG_ERR("Failed to initialize settings subsystem (%d)", rc);
+		return rc;
+	}
+	LOG_INF("Settings subsystem initialized");
+
+	/* Load settings from storage */
+	rc = settings_load();
+	if (rc == 0) {
+		LOG_INF("Settings loaded successfully");
+	} else {
+		LOG_WRN("Failed to load settings (%d)", rc);
+	}
+
+	/* Initialize valve system */
+	rc = valve_init();
+	if (rc != 0) {
+		LOG_ERR("Failed to initialize valve system (%d)", rc);
+		return rc;
+	}
+	LOG_INF("Valve system initialized");
+
+	return 0;
+}

software/apps/can_node/sysbuild.conf

@@ -0,0 +1,5 @@
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_MCUBOOT_MODE_SINGLE_APP=y
+
+CONFIG_LOG=y
+CONFIG_MCUBOOT_LOG_LEVEL_INF=y

software/apps/gateway/CMakeLists.txt

@@ -1,9 +1,8 @@
-cmake_minimum_required(VERSION 3.20)
-
-# Include the main 'software' directory as a module to find boards, libs, etc.
-list(APPEND ZEPHYR_EXTRA_MODULES ${CMAKE_CURRENT_SOURCE_DIR}/../..)
+cmake_minimum_required(VERSION 3.20.5)
 
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
-project(gateway)
 
+project(gateway)
 target_sources(app PRIVATE src/main.c)
+
+target_include_directories(app PRIVATE include)

software/apps/gateway/README.md

@@ -0,0 +1,44 @@
+# README for the Hello World Zephyr Application
+
+## Overview
+
+This is a minimal Hello World application built using the Zephyr RTOS. The application demonstrates basic logging functionality by printing a message every 5 seconds, including the version number of the application.
+
+## Project Structure
+
+The project consists of the following files:
+
+- `src/main.c`: The entry point of the application that initializes logging and sets up a timer.
+- `include/app_version.h`: Header file that defines the application version.
+- `VERSION`: A text file containing the version number of the application.
+- `prj.conf`: Configuration file for the Zephyr project, specifying necessary options.
+- `CMakeLists.txt`: Build configuration file for CMake.
+- `README.md`: Documentation for the project.
+
+## Building the Application
+
+To build the application, follow these steps:
+
+1. Ensure you have the Zephyr development environment set up.
+2. Navigate to the `apps/gateway` directory.
+3. Run the following command to build the application:
+
+   ```
+   west build -b <your_board> .
+   ```
+
+   Replace `<your_board>` with the appropriate board name.
+
+## Running the Application
+
+After building the application, you can flash it to your board using:
+
+```
+west flash
+```
+
+Once the application is running, you will see log messages printed every 5 seconds, including the version number.
+
+## Version
+
+The version of this application can be found in the `VERSION` file and is also included in the log messages.

software/apps/gateway/VERSION

@@ -0,0 +1,5 @@
+VERSION_MAJOR = 0
+VERSION_MINOR = 0
+PATCHLEVEL = 1
+VERSION_TWEAK = 0
+EXTRAVERSION = devel

software/apps/gateway/boards/common_4MB.dtsi

@@ -0,0 +1,16 @@
+&flash0 {
+    reg = <0x0 0x400000>; /* 4MB flash */
+};
+
+#include "espressif/partitions_0x0_default_4M.dtsi"
+
+/ {
+    chosen {
+        zephyr,shell-uart = &uart0;
+        zephyr,uart-mcumgr = &usb_serial;
+    };
+};
+
+&usb_serial {
+    status = "okay";
+};

software/apps/gateway/boards/esp32c6_devkitc_hpcore.overlay

@@ -0,0 +1 @@
+#include "common_4MB.dtsi"

software/apps/gateway/prj.conf

@@ -1,2 +1,47 @@
-# Gateway Configuration
-CONFIG_NETWORKING=y
+# -------------------
+# Logging and Console
+# -------------------
+CONFIG_LOG=y
+CONFIG_UART_CONSOLE=y
+
+# -------------
+# Zephyr Shell
+# -------------
+CONFIG_SHELL=y
+CONFIG_KERNEL_SHELL=y
+CONFIG_REBOOT=y
+
+# -------------------
+# MCUmgr OS Management
+# -------------------
+CONFIG_MCUMGR=y
+CONFIG_MCUMGR_GRP_OS=y
+CONFIG_MCUMGR_TRANSPORT_UART=y
+
+# -------------------
+# MCUmgr Filesystem Group
+# -------------------
+CONFIG_MCUMGR_GRP_FS=y
+
+# -------------------
+# LittleFS and Flash
+# -------------------
+CONFIG_FILE_SYSTEM=y
+CONFIG_FILE_SYSTEM_LITTLEFS=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+
+# -------------------
+# Settings Subsystem
+# -------------------
+CONFIG_SETTINGS=y
+CONFIG_SETTINGS_FILE=y
+CONFIG_SETTINGS_FILE_PATH="/lfs/settings.bin"
+
+# -------------------
+# Dependencies
+# -------------------
+CONFIG_NET_BUF=y
+CONFIG_ZCBOR=y
+CONFIG_CRC=y
+CONFIG_BASE64=y

software/apps/gateway/src/main.c

@@ -1,13 +1,136 @@
-/*
- * Copyright (c) 2025 Eduard Iten
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
+#include <zephyr/fs/fs.h>
+#include <zephyr/fs/littlefs.h>
 #include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/shell/shell.h>
+#include <app_version.h>
+#include <string.h>
+
+LOG_MODULE_REGISTER(hello_world);
+
+/* LittleFS mount configuration for 'storage_partition' partition */
+FS_LITTLEFS_DECLARE_DEFAULT_CONFIG(storage_partition);
+static struct fs_mount_t littlefs_mnt = {
+    .type = FS_LITTLEFS,
+    .mnt_point = "/lfs",
+    .fs_data = &storage_partition, // default config macro
+    .storage_dev = (void *)FIXED_PARTITION_ID(storage_partition),
+};
+
+static char my_setting[32] = "default";
+
+static int my_settings_set(const char *name, size_t len, settings_read_cb read_cb, void *cb_arg)
+{
+	if (strcmp(name, "value") == 0) {
+		if (len > sizeof(my_setting) - 1) {
+			len = sizeof(my_setting) - 1;
+		}
+		if (read_cb(cb_arg, my_setting, len) == len) {
+			my_setting[len] = '\0';
+			return 0;
+		}
+		return -EINVAL;
+	}
+	return -ENOENT;
+}
+
+static int my_settings_export(int (*export_func)(const char *, const void *, size_t))
+{
+	return export_func("my/setting/value", my_setting, strlen(my_setting));
+}
+
+SETTINGS_STATIC_HANDLER_DEFINE(my, "my/setting", NULL, my_settings_set, NULL, my_settings_export);
+
+static int cmd_my_get(const struct shell *shell, size_t argc, char **argv)
+{
+	shell_print(shell, "my_setting = '%s'", my_setting);
+	return 0;
+}
+
+static int cmd_my_reset(const struct shell *shell, size_t argc, char **argv)
+{
+	strcpy(my_setting, "default");
+	settings_save();
+	shell_print(shell, "my_setting reset to default");
+	return 0;
+}
+
+// Improved set command: join all arguments for whitespace support
+static int cmd_my_set(const struct shell *shell, size_t argc, char **argv)
+{
+	if (argc < 2) {
+		shell_error(shell, "Usage: my set <value>");
+		return -EINVAL;
+	}
+	// Join all argv[1..] with spaces
+	size_t i, pos = 0;
+	my_setting[0] = '\0';
+	for (i = 1; i < argc; ++i) {
+		size_t left = sizeof(my_setting) - 1 - pos;
+		if (left == 0)
+			break;
+		strncat(my_setting, argv[i], left);
+		pos = strlen(my_setting);
+		if (i < argc - 1 && left > 1) {
+			strncat(my_setting, " ", left - 1);
+			pos = strlen(my_setting);
+		}
+	}
+	my_setting[sizeof(my_setting) - 1] = '\0';
+	settings_save();
+	shell_print(shell, "my_setting set to '%s'", my_setting);
+	return 0;
+}
+
+SHELL_STATIC_SUBCMD_SET_CREATE(my_subcmds,
+    SHELL_CMD(get, NULL, "Get my_setting", cmd_my_get),
+    SHELL_CMD(set, NULL, "Set my_setting (supports spaces)", cmd_my_set),
+    SHELL_CMD(reset, NULL, "Reset my_setting to default and compact settings file", cmd_my_reset),
+    SHELL_SUBCMD_SET_END);
+
+SHELL_CMD_REGISTER(my, &my_subcmds, "My settings commands", NULL);
+
+static void compact_settings_file(void)
+{
+	struct fs_file_t file;
+	fs_file_t_init(&file);
+	int rc = fs_open(&file, "/lfs/settings.bin", FS_O_WRITE | FS_O_CREATE | FS_O_TRUNC);
+	if (rc == 0) {
+		fs_close(&file);
+		LOG_INF("Settings file compacted (truncated and recreated)");
+	} else if (rc == -ENOENT) {
+		LOG_INF("Settings file did not exist, created new");
+	} else {
+		LOG_ERR("Failed to compact settings file (%d)", rc);
+	}
+	settings_save();
+}
 
 int main(void)
 {
-	printk("Hello from Gateway!\n");
+	int rc = fs_mount(&littlefs_mnt);
+	if (rc < 0) {
+		LOG_ERR("Error mounting LittleFS [%d]", rc);
+	} else {
+		LOG_INF("LittleFS mounted at /lfs");
+	}
+
+	/* Initialize settings subsystem */
+	settings_subsys_init();
+	LOG_INF("Settings subsystem initialized");
+
+	/* Load settings from storage */
+	rc = settings_load();
+	if (rc == 0) {
+		LOG_INF("Settings loaded: my_setting='%s'", my_setting);
+	} else {
+		LOG_ERR("Failed to load settings (%d)", rc);
+	}
+
+	/* Compact settings file on each start */
+	compact_settings_file();
+
+	LOG_INF("Hello World! Version: %s", APP_VERSION_EXTENDED_STRING);
 	return 0;
-}
+}

software/apps/gateway/sysbuild.conf

@@ -0,0 +1,2 @@
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_MCUBOOT_MODE_SINGLE_APP=y

software/apps/gateway/sysbuild/gateway.overlay

@@ -0,0 +1,8 @@
+#include "../boards/common_4MB.dtsi"
+
+/* Application Configuration - Firmware goes to slot0_partition (0x20000) */
+/ {
+    chosen {
+        zephyr,code-partition = &slot0_partition;
+    };
+};

software/apps/gateway/sysbuild/mcuboot.conf

@@ -0,0 +1,3 @@
+CONFIG_LOG=y
+CONFIG_MCUBOOT_LOG_LEVEL_INF=y
+CONFIG_UART_CONSOLE=n

software/apps/gateway/sysbuild/mcuboot.overlay

@@ -0,0 +1,12 @@
+#include "../boards/common_4MB.dtsi"
+
+/* MCUboot Configuration - Bootloader goes to boot_partition (0x0) */
+/ {
+    chosen {
+        zephyr,code-partition = &boot_partition;
+    };
+    aliases {
+        mcuboot-button0 = &user_button1;
+    };
+    
+};

software/apps/hello_world/prj.conf

@@ -1,4 +0,0 @@
-
-CONFIG_CONSOLE=y
-CONFIG_LOG=y
-CONFIG_UART_CONSOLE=y

software/apps/hello_world/src/main.c

@@ -1,9 +0,0 @@
-#include <zephyr/kernel.h>
-#include <zephyr/sys/printk.h>
-
-int main(void)
-{
-	printk("Hello World! %s\n", CONFIG_BOARD);
-	return 0;
-}
-

software/apps/mqtt_gateway

@@ -0,0 +1 @@
+Subproject commit 6e669cfc4e400c3ef6e55c16401788ce0d804577

software/apps/slave_node/.vscode/c_cpp_properties.json

@@ -0,0 +1,12 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "compileCommands": "${workspaceFolder}/build/compile_commands.json",
+            "cStandard": "c99",
+            "cppStandard": "gnu++17",
+            "intelliSenseMode": "linux-gcc-arm"
+        }
+    ],
+    "version": 4
+}

software/apps/slave_node/CMakeLists.txt

@@ -1,27 +1,10 @@
 cmake_minimum_required(VERSION 3.20)
 
-# Point BOARD_ROOT and DTS_ROOT to the 'software' directory, which contains 'boards'.
-list(APPEND BOARD_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../..)
-
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
-project(slave_node)
 
-list(APPEND KCONFIG_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/modbus_server/Kconfig)
-list(APPEND KCONFIG_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/valve/Kconfig)
-list(APPEND KCONFIG_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/fwu/Kconfig)
+project(slave_node LANGUAGES C)
 
-target_include_directories(app PRIVATE
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/valve/include
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/modbus_server/include
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/fwu/include
-)
+zephyr_include_directories(../../include)
+add_subdirectory(../../lib lib)
 
-# Add the source files from the app and the libraries
-target_sources(app PRIVATE
-    src/main.c
-    src/shell_modbus.c
-    src/shell_system.c
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/valve/src/valve.c
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/modbus_server/src/modbus_server.c
-    ${CMAKE_CURRENT_SOURCE_DIR}/../../modules/fwu/src/fwu.c
-)
+target_sources(app PRIVATE src/main.c)

software/apps/slave_node/Kconfig

@@ -0,0 +1,2 @@
+rsource "../../lib/Kconfig"
+source "Kconfig.zephyr"

software/apps/slave_node/VERSION

@@ -0,0 +1,5 @@
+VERSION_MAJOR = 0
+VERSION_MINOR = 0
+PATCHLEVEL = 1
+VERSION_TWEAK = 1
+EXTRAVERSION = devel

software/apps/slave_node/boards/bluepill_f103rb.conf

@@ -3,4 +3,5 @@ CONFIG_UART_CONSOLE=n
 
 # Enable RTT console
 CONFIG_RTT_CONSOLE=y
-CONFIG_USE_SEGGER_RTT=y
+CONFIG_USE_SEGGER_RTT=y
+CONFIG_SHELL_BACKEND_RTT=y

software/apps/slave_node/boards/native_sim.overlay

@@ -0,0 +1,47 @@
+/ {
+	aliases {
+		vnd7050aj = &vnd7050aj;
+	};
+
+	vnd7050aj: vnd7050aj {
+		compatible = "st,vnd7050aj";
+		status = "okay";
+
+		input0-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
+		input1-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
+		select0-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
+		select1-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
+		sense-enable-gpios = <&gpio0 5 GPIO_ACTIVE_HIGH>;
+		fault-reset-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
+		io-channels = <&adc0 0>;
+		r-sense-ohms = <1500>;
+		k-vcc = <4000>;
+	};
+
+	modbus_uart: uart_2 {
+		compatible = "zephyr,native-pty-uart";
+		status = "okay";
+		current-speed = <19200>;
+
+		modbus0: modbus0 {
+			compatible = "zephyr,modbus-serial";
+			status = "okay";
+		};
+	};
+
+};
+
+&adc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	ref-internal-mv = <3300>;
+	ref-external1-mv = <5000>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/slave_node/boards/weact_stm32g431_core.overlay

@@ -1,9 +1,48 @@
+/ {
+	aliases {
+		vnd7050aj = &vnd7050aj;
+	};
+
+	vnd7050aj: vnd7050aj {
+		compatible = "st,vnd7050aj";
+		status = "okay";
+
+		input0-gpios = <&gpiob 3 GPIO_ACTIVE_HIGH>;
+		input1-gpios = <&gpiob 4 GPIO_ACTIVE_HIGH>;
+		select0-gpios = <&gpiob 7 GPIO_ACTIVE_HIGH>;
+		select1-gpios = <&gpiob 9 GPIO_ACTIVE_HIGH>;
+		sense-enable-gpios = <&gpiob 6 GPIO_ACTIVE_HIGH>;
+		fault-reset-gpios = <&gpiob 5 GPIO_ACTIVE_LOW>;
+		io-channels = <&adc1 1>;
+		r-sense-ohms = <1500>;
+		k-vcc = <4000>;
+	};
+};
+
+&adc1 {
+	status = "okay";
+	pinctrl-0 = <&adc1_in1_pa0>;
+	pinctrl-names = "default";
+	st,adc-clock-source = "SYNC";
+	st,adc-prescaler = <4>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};
+
 &usart1 {
 	modbus0 {
 		compatible = "zephyr,modbus-serial";
 		status = "okay";
 	};
 	status = "okay";
-    pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
+    pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>; // PA9=TX, PA10=RX for Modbus communication
     pinctrl-names = "default";
 };

software/apps/slave_node/cdc-acm.overlay

@@ -0,0 +1,16 @@
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&zephyr_udc0 {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+
+		modbus0 {
+			compatible = "zephyr,modbus-serial";
+			status = "okay";
+		};
+	};
+};
+
+&usart1 {
+	/delete-node/ modbus0;
+};

software/apps/slave_node/dts/bindings/st,vnd7050aj.yaml

@@ -0,0 +1,88 @@
+# Copyright (c) 2024, Eduard Iten
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+  STMicroelectronics VND7050AJ dual-channel high-side driver.
+  This is a GPIO and ADC controlled device.
+
+compatible: "st,vnd7050aj"
+
+include: base.yaml
+
+properties:
+  input0-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to control output channel 0.
+
+  input1-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to control output channel 1.
+
+  select0-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO for MultiSense selection bit 0.
+
+  select1-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO for MultiSense selection bit 1.
+
+  sense-enable-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to enable the MultiSense output.
+
+  fault-reset-gpios:
+    type: phandle-array
+    required: true
+    description: GPIO to reset a latched fault (active-low).
+
+  io-channels:
+    type: phandle-array
+    required: true
+    description: |
+      ADC channel connected to the MultiSense pin. This should be an
+      io-channels property pointing to the ADC controller and channel number.
+
+  r-sense-ohms:
+    type: int
+    required: true
+    description: |
+      Value of the external sense resistor connected from the MultiSense
+      pin to GND, specified in Ohms. This is critical for correct
+      conversion of the analog readings.
+
+  k-factor:
+    type: int
+    default: 1500
+    description: |
+      Factor between PowerMOS and SenseMOS.
+
+  k-vcc:
+    type: int
+    default: 8000
+    description: |
+      VCC sense ratio multiplied by 1000. Used for supply voltage calculation.
+
+  t-sense-0:
+    type: int
+    default: 25
+    description: |
+      Temperature sense reference temperature in degrees Celsius.
+
+  v-sense-0:
+    type: int
+    default: 2070
+    description: |
+      Temperature sense reference voltage in millivolts.
+
+  k-tchip:
+    type: int
+    default: -5500
+    description: |
+      Temperature sense gain coefficient multiplied by 1000.
+      Used for chip temperature calculation.
+

software/apps/slave_node/overlay-cdc-acm.conf

@@ -0,0 +1,4 @@
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_DEVICE_PRODUCT="Modbus slave node"
+CONFIG_UART_LINE_CTRL=y
+CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n

software/apps/slave_node/prj.conf

@@ -4,8 +4,10 @@ CONFIG_LOG=y
 
 # Enable Shell
 CONFIG_SHELL=y
-CONFIG_SHELL_BACKEND_RTT=y
 CONFIG_REBOOT=y
+CONFIG_SHELL_MODBUS=y
+CONFIG_SHELL_VALVE=y
+CONFIG_SHELL_SYSTEM=y
 
 # Enable Settings Subsystem
 CONFIG_SETTINGS=y
@@ -20,5 +22,7 @@ CONFIG_SETTINGS_LOG_LEVEL_DBG=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
 CONFIG_MODBUS=y
 CONFIG_MODBUS_ROLE_SERVER=y
-CONFIG_MODBUS_BUFFER_SIZE=256
+CONFIG_MODBUS_LOG_LEVEL_DBG=y
 
+# Enable VND7050AJ
+CONFIG_VND7050AJ=y

software/apps/slave_node/src/main.c

@@ -1,14 +1,15 @@
 #include <zephyr/kernel.h>
-#include <zephyr/settings/settings.h>
 #include <zephyr/logging/log.h>
-#include <modbus_server.h>
-#include <valve.h>
-#include <fwu.h>
+#include <zephyr/settings/settings.h>
+#include <lib/fwu.h>
+#include <lib/modbus_server.h>
+#include <lib/valve.h>
 
 LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
 
 int main(void)
 {
+	int rc;
 	LOG_INF("Starting Irrigation System Slave Node");
 
 	if (settings_subsys_init() || settings_load()) {
@@ -18,11 +19,12 @@ int main(void)
 	valve_init();
 	fwu_init();
 
-	if (modbus_server_init()) {
-		LOG_ERR("Modbus RTU server initialization failed");
-		return 0;
+	rc = modbus_server_init();
+	if (rc) {
+		LOG_ERR("Modbus server initialization failed: %d", rc);
+		return rc;
 	}
-	
+
 	LOG_INF("Irrigation System Slave Node started successfully");
 	return 0;
 }

software/apps/slave_node/src/shell_modbus.c

@@ -1,119 +0,0 @@
-#include <zephyr/shell/shell.h>
-#include <stdlib.h>
-#include <modbus_server.h>
-#include <valve.h>
-
-static int cmd_modbus_set_baud(const struct shell *sh, size_t argc, char **argv)
-{
-	if (argc != 2) {
-		shell_error(sh, "Usage: set_baud <baudrate>");
-		return -EINVAL;
-	}
-
-	uint32_t new_baud = (uint32_t)strtoul(argv[1], NULL, 10);
-	const uint32_t valid_baud_rates[] = {1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200};
-	bool is_valid = false;
-
-	for (int i = 0; i < ARRAY_SIZE(valid_baud_rates); i++) {
-		if (new_baud == valid_baud_rates[i]) {
-			is_valid = true;
-			break;
-		}
-	}
-
-	if (!is_valid) {
-		char error_msg[128];
-		int offset = snprintf(error_msg, sizeof(error_msg), "Invalid baudrate. Valid rates are: ");
-		for (int i = 0; i < ARRAY_SIZE(valid_baud_rates); i++) {
-			offset += snprintf(error_msg + offset, sizeof(error_msg) - offset, "%u ", valid_baud_rates[i]);
-		}
-		shell_error(sh, "%s", error_msg);
-		return -EINVAL;
-	}
-
-	if (modbus_reconfigure(new_baud, modbus_get_unit_id()) != 0) {
-		shell_error(sh, "Failed to apply new baudrate");
-	} else {
-		shell_print(sh, "Modbus baudrate set to: %u (and saved)", new_baud);
-	}
-
-	return 0;
-}
-
-static int cmd_modbus_set_id(const struct shell *sh, size_t argc, char **argv)
-{
-	if (argc != 2) {
-		shell_error(sh, "Usage: set_id <slave_id>");
-		return -EINVAL;
-	}
-
-	uint32_t new_id_u32 = (uint32_t)strtoul(argv[1], NULL, 10);
-	if (new_id_u32 == 0 || new_id_u32 > 247) {
-		shell_error(sh, "Invalid slave ID: %s. Must be between 1 and 247.", argv[1]);
-		return -EINVAL;
-	}
-	uint8_t new_id = (uint8_t)new_id_u32;
-
-	if (modbus_reconfigure(modbus_get_baudrate(), new_id) != 0) {
-		shell_error(sh, "Failed to apply new slave ID");
-	} else {
-		shell_print(sh, "Modbus slave ID set to: %u (and saved)", new_id);
-	}
-
-	return 0;
-}
-
-static int cmd_valve_set_open_time(const struct shell *sh, size_t argc, char **argv)
-{
-    if (argc != 2) {
-        shell_error(sh, "Usage: set_open_time <seconds>");
-        return -EINVAL;
-    }
-
-    uint16_t seconds = (uint16_t)strtoul(argv[1], NULL, 10);
-    valve_set_max_open_time(seconds);
-    shell_print(sh, "Max opening time set to: %u seconds (and saved)", seconds);
-
-    return 0;
-}
-
-static int cmd_valve_set_close_time(const struct shell *sh, size_t argc, char **argv)
-{
-    if (argc != 2) {
-        shell_error(sh, "Usage: set_close_time <seconds>");
-        return -EINVAL;
-    }
-
-    uint16_t seconds = (uint16_t)strtoul(argv[1], NULL, 10);
-    valve_set_max_close_time(seconds);
-    shell_print(sh, "Max closing time set to: %u seconds (and saved)", seconds);
-
-    return 0;
-}
-
-static int cmd_config_show(const struct shell *sh, size_t argc, char **argv)
-{
-	shell_print(sh, "Current Modbus Configuration:");
-	shell_print(sh, "  Baudrate: %u", modbus_get_baudrate());
-	shell_print(sh, "  Slave ID: %u", modbus_get_unit_id());
-    shell_print(sh, "Current Valve Configuration:");
-    shell_print(sh, "  Max Opening Time: %u s", valve_get_max_open_time());
-    shell_print(sh, "  Max Closing Time: %u s", valve_get_max_close_time());
-	return 0;
-}
-
-SHELL_STATIC_SUBCMD_SET_CREATE(sub_modbus_cmds,
-	SHELL_CMD(set_baud, NULL, "Set Modbus baudrate", cmd_modbus_set_baud),
-	SHELL_CMD(set_id,   NULL, "Set Modbus slave ID", cmd_modbus_set_id),
-	SHELL_SUBCMD_SET_END
-);
-
-SHELL_STATIC_SUBCMD_SET_CREATE(sub_valve_cmds,
-    SHELL_CMD(set_open_time, NULL, "Set max valve opening time", cmd_valve_set_open_time),
-    SHELL_CMD(set_close_time, NULL, "Set max valve closing time", cmd_valve_set_close_time),
-    SHELL_SUBCMD_SET_END
-);
-
-SHELL_CMD_REGISTER(modbus, &sub_modbus_cmds, "Modbus configuration", NULL);
-SHELL_CMD_REGISTER(valve, &sub_valve_cmds, "Valve configuration", NULL);
-SHELL_CMD_REGISTER(show_config, NULL, "Show all configurations", cmd_config_show);

software/apps/slave_node/src/shell_system.c

@@ -1,12 +0,0 @@
-#include <zephyr/shell/shell.h>
-#include <zephyr/sys/reboot.h>
-
-static int cmd_reset(const struct shell *sh, size_t argc, char **argv)
-{
-	shell_print(sh, "Rebooting system...");
-	k_sleep(K_MSEC(100)); // Allow the shell to print the message
-	sys_reboot(SYS_REBOOT_WARM);
-	return 0;
-}
-
-SHELL_CMD_REGISTER(reset, NULL, "Reboot the system", cmd_reset);

software/apps/slave_node/sysbuild.conf

@@ -0,0 +1,5 @@
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_MCUBOOT_MODE_SINGLE_APP=y
+
+CONFIG_LOG=y
+CONFIG_MCUBOOT_LOG_LEVEL_INF=y

software/apps/stm32g431_tests/prj.conf

@@ -1,4 +0,0 @@
-
-CONFIG_CONSOLE=y
-CONFIG_LOG=y
-CONFIG_UART_CONSOLE=y

software/apps/stm32g431_tests/src/main.c

@@ -1,9 +0,0 @@
-#include <zephyr/kernel.h>
-#include <zephyr/sys/printk.h>
-
-int main(void)
-{
-	printk("Hello World! %s\n", CONFIG_BOARD);
-	return 0;
-}
-

software/esphome/.gitignore

@@ -0,0 +1,5 @@
+# Gitignore settings for ESPHome
+# This is an example and may include too much for your use-case.
+# You can modify this file to suit your needs.
+/.esphome/
+/secrets.yaml

software/esphome/can.yaml

@@ -0,0 +1,106 @@
+# ===================================================================
+# ESPHome Configuration
+# CAN-Bus Master für ein Bewässerungssystem auf Basis des ESP32-C6
+#
+# Version 10: Finale Korrektur der Lambda-Signatur gemäß Dokumentation
+# ===================================================================
+
+esphome:
+  name: can-bridge
+  friendly_name: Irrigation can bridge
+
+esp32:
+  board: esp32-c6-devkitm-1
+  framework:
+    type: esp-idf # Erforderlich für den ESP32-C6
+
+# --- Netzwerk & Sicherheit ---
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+  fast_connect: true
+
+api:
+  encryption:
+    key: !secret api_key
+
+ota:
+  platform: esphome
+  password: !secret ota_password
+
+logger:
+
+web_server:
+
+# --- Globale Variablen ---
+globals:
+  - id: ventil_2_can_state
+    type: int
+    initial_value: '0' # Startet als "geschlossen"
+
+# --- CAN-Bus Konfiguration ---
+canbus:
+  - platform: esp32_can
+    id: my_can_bus
+    tx_pin: GPIO5
+    rx_pin: GPIO4
+    bit_rate: 125kbps
+    can_id: 0x000 # Erforderlich, um Parser-Fehler zu beheben.
+    on_frame:
+      # Horcht nur auf die Statusmeldung von Knoten 2 (ID 0x422)
+      - can_id: 0x422
+        then:
+          - lambda: |-
+              if (x.size() < 1) {
+                ESP_LOGW("on_can_frame", "Received empty Frame for ID 0x422");
+                return;
+              }
+              int received_state = x[0];
+              id(ventil_2_can_state) = received_state;
+              ESP_LOGD("on_can_frame", "Received state from Valve 2: %i", received_state);
+          - valve.template.publish:
+              id: ventil_2
+              current_operation: !lambda |-
+                int state = id(ventil_2_can_state);
+                if (state == 2) {
+                  return VALVE_OPERATION_OPENING;
+                } else if (state == 3) {
+                  return VALVE_OPERATION_CLOSING;
+                } else {
+                  return VALVE_OPERATION_IDLE;
+                }
+
+# --- Home Assistant Entitäten ---
+valve:
+  - platform: template
+    name: "Ventil 2"
+    id: ventil_2
+    
+    # Diese Lambda meldet nur den binären End-Zustand (offen/geschlossen)
+    lambda: |-
+      if (id(ventil_2_can_state) == 0) {
+        return VALVE_CLOSED;
+      } else if (id(ventil_2_can_state) == 1) {
+        return VALVE_OPEN;
+      } else {
+        return NAN;
+      }
+
+    # Aktionen zum Steuern des Ventils
+    open_action:
+      - canbus.send:
+          canbus_id: my_can_bus
+          can_id: 0x210
+          data: [0x02, 0x01]
+
+    close_action:
+      - canbus.send:
+          canbus_id: my_can_bus
+          can_id: 0x210
+          data: [0x02, 0x00]
+
+    stop_action:
+      - canbus.send:
+          canbus_id: my_can_bus
+          can_id: 0x210
+          data: [0x02, 0x03]

software/esphome/create_secrets.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+
+import secrets
+import string
+import os
+import base64
+from ruamel.yaml import YAML
+
+def generate_password(length=32):
+    """Generate a random password."""
+    alphabet = string.ascii_letters + string.digits
+    return ''.join(secrets.choice(alphabet) for i in range(length))
+
+def generate_api_key():
+    """Generate a random 32-byte key and base64 encode it."""
+    return base64.b64encode(secrets.token_bytes(32)).decode('utf-8')
+
+SECRETS_FILE = 'secrets.yaml'
+# In a real ESPHome project, secrets are often included from a central location
+# but for this script, we'll assume it's in the current directory.
+# You might need to adjust this path.
+secrets_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), SECRETS_FILE)
+
+yaml = YAML()
+yaml.preserve_quotes = True
+# To prevent line wrapping
+yaml.width = 4096
+
+try:
+    with open(secrets_path, 'r') as f:
+        secrets_data = yaml.load(f)
+    if secrets_data is None:
+        secrets_data = {}
+except FileNotFoundError:
+    print(f"Info: '{SECRETS_FILE}' not found. A new file will be created.")
+    secrets_data = {}
+
+# Generate new random passwords
+new_api_key = generate_api_key()
+new_ota_password = generate_password()
+
+# Update the dictionary with the new passwords
+if 'api_password' in secrets_data:
+    del secrets_data['api_password']
+secrets_data['api_key'] = new_api_key
+secrets_data['ota_password'] = new_ota_password
+
+# Write the updated dictionary back to the YAML file
+with open(secrets_path, 'w') as f:
+    yaml.dump(secrets_data, f)
+
+print(f"Successfully updated '{SECRETS_FILE}'.")
+print("New values:")
+print(f"  api_key: {new_api_key}")
+print(f"  ota_password: {new_ota_password}")

software/esphome/irrigation_system.yaml

@@ -0,0 +1,166 @@
+# ===================================================================
+# ESPHome Configuration - Final Version
+#
+# This version corrects the C++ function call inside the valve actions
+# to use the correct `send` method from the ModbusDevice base class,
+# which is compatible with the esp-idf framework.
+# ===================================================================
+
+esphome:
+  name: irrigation-system
+  friendly_name: Bewässerung
+
+esp32:
+  board: esp32-c6-devkitm-1
+  framework:
+    type: esp-idf # Set to esp-idf as required by the ESP32-C6 board
+
+wifi:
+  ssid: !secret wifi_ssid
+  password: !secret wifi_password
+  fast_connect: true
+
+api:
+  encryption:
+    key: !secret api_key
+
+ota:
+  platform: esphome
+  password: !secret ota_password
+
+logger:
+
+web_server:
+
+# ===================================================================
+# HARDWARE SETUP - COMPLETE
+# ===================================================================
+
+# --- UART for RS485 Communication ---
+uart:
+  id: uart_bus
+  tx_pin: GPIO1
+  rx_pin: GPIO2
+  baud_rate: 9600
+  data_bits: 8
+  stop_bits: 1
+  parity: NONE
+
+# --- Base Modbus component for the bus ---
+modbus:
+  - id: modbus_hub
+    uart_id: uart_bus
+
+# --- Modbus Controller for the specific valve device ---
+modbus_controller:
+  - id: valve_controller
+    modbus_id: modbus_hub
+    address: 0 # The Modbus address of your valve. Change if not 0.
+    # update_interval: 1s
+
+# ===================================================================
+# SENSORS - COMPLETE
+# ===================================================================
+sensor:
+  # This sensor reads the raw 16-bit value from the valve's input register.
+  - platform: modbus_controller
+    modbus_controller_id: valve_controller
+    name: "Valve Raw Status"
+    id: valve_raw_status
+    internal: true # Hide from Home Assistant UI
+    register_type: read # 'read' is the valid type for input registers
+    address: 0x0000 # The address of the register to read
+    value_type: U_WORD # Read the full 16-bit unsigned word
+  - platform: modbus_controller
+    modbus_controller_id: valve_controller
+    name: "VDD"
+    id: valve_vdd
+    register_type: read # 'read' is the valid type for input registers
+    address: 0x00FC # The address of the register to read
+    value_type: U_WORD # Read the full 16-bit unsigned word
+    entity_category: diagnostic # Mark as diagnostic
+    unit_of_measurement: "V"
+    accuracy_decimals: 2 # Show two decimal places
+    # Apply filters to convert the raw value to volts and update periodically
+    filters:
+      - lambda: |-
+          // Convert the raw VDD value to volts
+          return x / 1000.0; // Assuming the value is in millivolts
+      - heartbeat: 60s # Update every 60 seconds
+      - delta: 200 # Only update if the value changes by more than 200 mV
+
+# ===================================================================
+# TEXT SENSORS FOR HUMAN-READABLE STATUS
+# ===================================================================
+text_sensor:
+  # 1. This text sensor extracts the HIGH BYTE for the operation status.
+  - platform: template
+    name: "Valve Operation"
+    id: valve_operation_status
+    icon: "mdi:state-machine"
+    lambda: |-
+      // Extract the high byte from the raw status sensor
+      // using a bitwise right shift.
+      int operation_code = (int)id(valve_raw_status).state >> 8;
+      switch (operation_code) {
+        case 0: return {"Idle"};
+        case 1: return {"Opening"};
+        case 2: return {"Closing"};
+        case 3: return {"Obstacle Detected"};
+        case 4: return {"End Position Not Reached"};
+        default: return {"Unknown Operation"};
+      }
+
+  # 2. This text sensor extracts the LOW BYTE for the current valve state.
+  - platform: template
+    name: "Valve Position"
+    id: valve_position_status
+    icon: "mdi:valve"
+    lambda: |-
+      // Extract the low byte from the raw status sensor
+      // using a bitwise AND mask.
+      int state_code = (int)id(valve_raw_status).state & 0xFF;
+      switch (state_code) {
+        case 0: return {"Closed"};
+        case 1: return {"Open"};
+        default: return {"Unknown"};
+      }
+
+# ===================================================================
+# THE MAIN VALVE COMPONENT
+# ===================================================================
+valve:
+  - platform: template
+    name: "Modbus Controlled Valve"
+    id: modbus_valve
+    optimistic: false
+    # The lambda determines the current state (open or closed) of the valve.
+    lambda: |-
+      int state_code = (int)id(valve_raw_status).state & 0xFF;
+      if (state_code == 1) {
+        return true; // Open
+      } else if (state_code == 0) {
+        return false; // Closed
+      } else {
+        return {}; // Unknown
+      }
+    # Action to execute when the "OPEN" button is pressed.
+    open_action:
+      - lambda: |-
+          // Use the send() command inherited from ModbusDevice
+          // Function 0x06: Write Single Register
+          // Payload for value 1 is {0x00, 0x01}
+          const uint8_t data[] = {0x00, 0x01};
+          id(valve_controller).send(0x06, 0x0000, 1, 2, data);
+    # Action to execute when the "CLOSE" button is pressed.
+    close_action:
+      - lambda: |-
+          // Payload for value 2 is {0x00, 0x02}
+          const uint8_t data[] = {0x00, 0x02};
+          id(valve_controller).send(0x06, 0x0000, 1, 2, data);
+    # Action to execute when the "STOP" button is pressed.
+    stop_action:
+      - lambda: |-
+          // Payload for value 3 is {0x00, 0x03}
+          const uint8_t data[] = {0x00, 0x03};
+          id(valve_controller).send(0x06, 0x0000, 1, 2, data);

software/esphome/requirements.txt

@@ -0,0 +1,2 @@
+ruamel.yaml
+esphome

software/esphome/secrets.yaml.example

@@ -0,0 +1,4 @@
+wifi_ssid: 'PUT YOUR WIFI SSID HERE'
+wifi_password: 'PUT YOUR WIFI PASSWORD HERE'
+api_key: 'PUT YOUR KEY HERE OR USE create_secrets.py'
+ota_password: 'PUT YOUR KEY HERE OR USE create_secrets.py'

software/include/lib/can_ids.h

@@ -0,0 +1,41 @@
+#ifndef CAN_IDS_H
+#define CAN_IDS_H
+
+/*
+CAN ID structure for the irrigation system.
+PPP FFFF NNNN
+
+PPP: Priority
+    000: Network segment
+    001: Critical error
+    010: Commands
+    100: Status messages
+    110: measurements
+    111: Info messages
+
+FFFF: Function
+    0001: Valve Commands
+    0010: Valve States
+    0011: IO Commands
+    0100: IO States
+    0101: Measurements
+    0111: Sysem Functions (e.g. reset, firmware update)
+
+NNNN: Node ID
+*/
+
+#define CAN_ID_PRIORITY_NETWORK 0x000
+#define CAN_ID_PRIORITY_CRITICAL_ERROR 0x100
+#define CAN_ID_PRIORITY_COMMANDS 0x200
+#define CAN_ID_PRIORITY_STATUS 0x400
+#define CAN_ID_PRIORITY_MEASUREMENTS 0x600
+#define CAN_ID_PRIORITY_INFO 0x700
+
+#define CAN_ID_FUNCTION_VALVE_COMMANDS 0x010
+#define CAN_ID_FUNCTION_VALVE_STATES 0x020
+#define CAN_ID_FUNCTION_IO_COMMANDS 0x030
+#define CAN_ID_FUNCTION_IO_STATES 0x040
+#define CAN_ID_FUNCTION_MEASUREMENTS 0x050
+#define CAN_ID_FUNCTION_SYSTEM_FUNCTIONS 0x070
+
+#endif // CAN_IDS_H

software/include/lib/fwu.h

@@ -0,0 +1,47 @@
+#ifndef FWU_H
+#define FWU_H
+
+#include <stdint.h>
+
+/**
+ * @file fwu.h
+ * @brief API for the Firmware Update (FWU) library.
+ *
+ * This library provides the core logic for handling the over-the-air firmware
+ * update process via Modbus. It manages the data buffer, processes commands,
+ * and calculates CRC checksums for data verification.
+ */
+
+/**
+ * @brief Initializes the firmware update module.
+ *
+ * This function currently does nothing but is a placeholder for future
+ * initialization logic.
+ */
+void fwu_init(void);
+
+/**
+ * @brief Handles incoming Modbus register writes related to firmware updates.
+ *
+ * This function is the main entry point for the FWU process. It parses the
+ * address and value from a Modbus write operation and takes appropriate action,
+ * such as storing metadata (offset, size) or data chunks, and processing
+ * commands (verify, finalize).
+ *
+ * @param addr The Modbus register address being written to.
+ * @param reg The 16-bit value being written to the register.
+ */
+void fwu_handler(uint16_t addr, uint16_t reg);
+
+/**
+ * @brief Gets the CRC16-CCITT of the last received firmware chunk.
+ *
+ * After a data chunk is fully received into the buffer, this function can be
+ * called to retrieve the calculated CRC checksum. The master can then compare
+ * this with its own calculated CRC to verify data integrity.
+ *
+ * @return The 16-bit CRC of the last chunk.
+ */
+uint16_t fwu_get_last_chunk_crc(void);
+
+#endif // FWU_H

software/include/lib/modbus_server.h

@@ -0,0 +1,185 @@
+#ifndef MODBUS_SERVER_H
+#define MODBUS_SERVER_H
+
+#include <stdint.h>
+
+/**
+ * @file modbus_server.h
+ * @brief API for the Modbus server implementation.
+ *
+ * This file defines the Modbus register map and provides functions to
+ * initialize and manage the Modbus server.
+ */
+
+/**
+ * @brief Modbus Input Register Addresses (Read-Only).
+ * @see docs/modbus-registers.de.md
+ */
+enum {
+	/**
+	 * @brief Combined status register for the valve.
+	 * High-Byte: Movement (0=Idle, 1=Opening, 2=Closing, 3=Error).
+	 * Low-Byte: State (0=Closed, 1=Open).
+	 */
+	REG_INPUT_VALVE_STATE_MOVEMENT = 0x0000,
+	/**
+	 * @brief Motor current during opening in milliamperes (mA).
+	 */
+	REG_INPUT_MOTOR_OPEN_CURRENT_MA = 0x0001,
+	/**
+	 * @brief Motor current during closing in milliamperes (mA).
+	 */
+	REG_INPUT_MOTOR_CLOSE_CURRENT_MA = 0x0002,
+	/**
+	 * @brief Bitmask of digital inputs. Bit 0: Input 1, Bit 1: Input 2.
+	 * 1=Active.
+	 */
+	REG_INPUT_DIGITAL_INPUTS_STATE = 0x0020,
+	/**
+	 * @brief Event flags for buttons (Clear-on-Read). Bit 0: Button 1 pressed.
+	 * Bit 1: Button 2 pressed.
+	 */
+	REG_INPUT_BUTTON_EVENTS = 0x0021,
+	/**
+	 * @brief Firmware version, e.g., 0x0102 for v1.2.
+	 */
+	REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR = 0x00F0,
+	/**
+	 * @brief Firmware version patch level, e.g., 3 for v1.2.3.
+	 */
+	REG_INPUT_FIRMWARE_VERSION_PATCH = 0x00F1,
+	/**
+	 * @brief Device status (0=OK, 1=General Error).
+	 */
+	REG_INPUT_DEVICE_STATUS = 0x00F2,
+	/**
+	 * @brief Lower 16 bits of uptime in seconds.
+	 */
+	REG_INPUT_UPTIME_SECONDS_LOW = 0x00F3,
+	/**
+	 * @brief Upper 16 bits of uptime in seconds.
+	 */
+	REG_INPUT_UPTIME_SECONDS_HIGH = 0x00F4,
+	/**
+	 * @brief Current supply voltage in millivolts (mV).
+	 */
+	REG_INPUT_SUPPLY_VOLTAGE_MV = 0x00F5,
+	/**
+	 * @brief CRC16 of the last received data chunk in the buffer for firmware
+	 * update.
+	 */
+	REG_INPUT_FWU_LAST_CHUNK_CRC = 0x0100
+};
+
+/**
+ * @brief Modbus Holding Register Addresses (Read/Write).
+ * @see docs/modbus-registers.de.md
+ */
+enum {
+	/**
+	 * @brief Valve control command (1=Open, 2=Close, 0=Stop movement).
+	 */
+	REG_HOLDING_VALVE_COMMAND = 0x0000,
+	/**
+	 * @brief Safety timeout in seconds for the opening process.
+	 */
+	REG_HOLDING_MAX_OPENING_TIME_S = 0x0001,
+	/**
+	 * @brief Safety timeout in seconds for the closing process.
+	 */
+	REG_HOLDING_MAX_CLOSING_TIME_S = 0x0002,
+	/**
+	 * @brief Minimum current threshold in mA for end-position detection.
+	 */
+	REG_HOLDING_END_CURRENT_THRESHOLD_OPEN_MA = 0x0003,
+	/**
+	 * @brief Minimum current threshold in mA for end-position detection during
+	 * closing.
+	 */
+	REG_HOLDING_END_CURRENT_THRESHOLD_CLOSE_MA = 0x0004,
+	/**
+	 * @brief Current threshold in mA for obstacle detection during opening.
+	 */
+	REG_HOLDING_OBSTACLE_THRESHOLD_OPEN_MA = 0x0005,
+	/**
+	 * @brief Current threshold in mA for obstacle detection during closing.
+	 */
+	REG_HOLDING_OBSTACLE_THRESHOLD_CLOSE_MA = 0x0006,
+	/**
+	 * @brief Bitmask for reading and writing digital outputs. Bit 0: Output 1,
+	 * Bit 1: Output 2. 1=ON, 0=OFF.
+	 */
+	REG_HOLDING_DIGITAL_OUTPUTS_STATE = 0x0010,
+	/**
+	 * @brief Fail-safe watchdog timeout in seconds. 0=Disabled.
+	 */
+	REG_HOLDING_WATCHDOG_TIMEOUT_S = 0x00F0,
+	/**
+	 * @brief Writing 1 restarts the device.
+	 */
+	REG_HOLDING_DEVICE_RESET = 0x00F1,
+	/**
+	 * @brief Command for firmware update.
+	 * 1: Verify Chunk - Slave writes the last chunk to flash.
+	 * 2: Finalize Update - Complete installation and restart.
+	 */
+	REG_HOLDING_FWU_COMMAND = 0x0100,
+	/**
+	 * @brief Lower 16 bits of the 32-bit offset for the next firmware update
+	 * chunk.
+	 */
+	REG_HOLDING_FWU_CHUNK_OFFSET_LOW = 0x0101,
+	/**
+	 * @brief Upper 16 bits of the 32-bit offset for the next firmware update
+	 * chunk.
+	 */
+	REG_HOLDING_FWU_CHUNK_OFFSET_HIGH = 0x0102,
+	/**
+	 * @brief Size of the next firmware update chunk in bytes (max. 256).
+	 */
+	REG_HOLDING_FWU_CHUNK_SIZE = 0x0103,
+	/**
+	 * @brief Start address of the 256-byte buffer for firmware update data.
+	 */
+	REG_HOLDING_FWU_DATA_BUFFER = 0x0180,
+};
+
+/**
+ * @brief Initializes the Modbus server.
+ *
+ * This function sets up the Modbus RTU server interface, loads saved settings
+ * (baudrate, unit ID), and starts listening for requests.
+ *
+ * @return 0 on success, or a negative error code on failure.
+ */
+int modbus_server_init(void);
+
+/**
+ * @brief Reconfigures the Modbus server at runtime.
+ *
+ * Updates the baudrate and unit ID of the server. If the reconfiguration
+ * fails, the settings are saved and will be applied after a device reset.
+ *
+ * @param baudrate The new baudrate to set.
+ * @param unit_id The new Modbus unit ID (slave address).
+ * @return 0 on success, or a negative error code if immediate reconfiguration
+ * fails. Returns 0 even on failure if settings could be saved for the next
+ * boot.
+ */
+int modbus_reconfigure(uint32_t baudrate, uint8_t unit_id);
+
+/**
+ * @brief Gets the current baudrate of the Modbus server.
+ *
+ * @return The current baudrate.
+ */
+uint32_t modbus_get_baudrate(void);
+
+/**
+ * @brief Gets the current unit ID of the Modbus server.
+ *
+ * @return The current unit ID.
+ */
+uint8_t modbus_get_unit_id(void);
+
+#endif // MODBUS_SERVER_H

software/include/lib/valve.h

@@ -0,0 +1,214 @@
+#ifndef VALVE_H
+#define VALVE_H
+
+#include <zephyr/drivers/gpio.h>
+#include <stdint.h>
+
+/**
+ * @file valve.h
+ * @brief API for controlling the motorized valve.
+ *
+ * This library provides functions to initialize, open, close, and stop the
+ * valve. It also allows getting the valve's state and movement status, and
+ * configuring the maximum opening and closing times.
+ */
+
+#define VALVE_CHANNEL_OPEN 0
+#define VALVE_CHANNEL_CLOSE 1
+#define VALVE_CURRENT_CHECK_INTERVAL K_MSEC(CONFIG_VALVE_INTERVALL_CURRENT_CHECK_MS)
+#define VALVE_INITIAL_CURRENT_CHECK_INTERVAL K_MSEC(CONFIG_VALVE_INITIAL_INTERVALL_CURRENT_CHECK_MS)
+
+/**
+ * @brief Represents the static state of the valve (open or closed).
+ */
+enum valve_state {
+	VALVE_STATE_CLOSED, /**< The valve is fully closed. */
+	VALVE_STATE_OPEN, /**< The valve is fully open. */
+};
+
+/**
+ * @brief Represents the dynamic movement status of the valve.
+ */
+enum valve_movement {
+	VALVE_MOVEMENT_IDLE, /**< The valve is not moving. */
+	VALVE_MOVEMENT_OPENING, /**< The valve is currently opening. */
+	VALVE_MOVEMENT_CLOSING, /**< The valve is currently closing. */
+	VALVE_MOVEMENT_ERROR /**< An error occurred during movement. */
+};
+
+/**
+ * @brief Initializes the valve control system.
+ *
+ * Configures the GPIOs and loads saved settings for timeouts.
+ * This function must be called before any other valve functions.
+ *
+ * @return 0 on success, or a negative error code on failure.
+ */
+int valve_init(void);
+
+/**
+ * @brief Starts opening the valve.
+ *
+ * The valve will open for the configured maximum opening time.
+ */
+void valve_open(void);
+
+/**
+ * @brief Starts closing the valve.
+ *
+ * The valve will close for the configured maximum closing time.
+ */
+void valve_close(void);
+
+/**
+ * @brief Stops any ongoing valve movement immediately.
+ */
+void valve_stop(void);
+
+/**
+ * @brief Gets the current static state of the valve.
+ *
+ * @return The current valve state (VALVE_STATE_CLOSED or VALVE_STATE_OPEN).
+ */
+enum valve_state valve_get_state(void);
+
+/**
+ * @brief Gets the current movement status of the valve.
+ *
+ * @return The current movement status.
+ */
+enum valve_movement valve_get_movement(void);
+
+/**
+ * @brief Sets the maximum time for the valve to open.
+ *
+ * @param seconds The timeout in seconds.
+ */
+void valve_set_max_open_time(uint16_t seconds);
+
+/**
+ * @brief Sets the maximum time for the valve to close.
+ *
+ * @param seconds The timeout in seconds.
+ */
+void valve_set_max_close_time(uint16_t seconds);
+
+/**
+ * @brief Sets the current threshold for end-position detection during opening.
+ *
+ * @param current_ma The current threshold in milliamps.
+ */
+void valve_set_end_current_threshold_open(uint16_t current_ma);
+
+/**
+ * @brief Sets the current threshold for end-position detection during closing.
+ *
+ * @param current_ma The current threshold in milliamps.
+ */
+void valve_set_end_current_threshold_close(uint16_t current_ma);
+
+/**
+ * @brief Gets the current threshold for end-position detection during opening.
+ *
+ * @return The current threshold in milliamps.
+ */
+uint16_t valve_get_end_current_threshold_open(void);
+
+/**
+ * @brief Gets the current threshold for end-position detection during closing.
+ *
+ * @return The current threshold in milliamps.
+ */
+uint16_t valve_get_end_current_threshold_close(void);
+
+/**
+ * @brief Gets the configured maximum opening time.
+ *
+ * @return The timeout in seconds.
+ */
+uint16_t valve_get_max_open_time(void);
+
+/**
+ * @brief Gets the configured maximum closing time.
+ *
+ * @return The timeout in seconds.
+ */
+uint16_t valve_get_max_close_time(void);
+
+/**
+ * @brief Gets the current drawn by the valve motor during opening.
+ *
+ * @return The motor current in milliamps.
+ */
+int32_t valve_get_opening_current(void);
+
+/**
+ * @brief Gets the current drawn by the valve motor during closing.
+ *
+ * @return The motor current in milliamps.
+ */
+int32_t valve_get_closing_current(void);
+
+/**
+ * @brief Gets the temperature of the valve motor driver.
+ *
+ * @return The temperature in degrees Celsius.
+ */
+int32_t valve_get_vnd_temp(void);
+
+/**
+ * @brief Gets the voltage supplied to the valve motor driver.
+ *
+ * @return The voltage in millivolts.
+ */
+int32_t valve_get_vnd_voltage(void);
+
+/**
+ * @brief Sets the current threshold for obstacle detection during opening.
+ *
+ * @param current_ma The current threshold in milliamps.
+ */
+void valve_set_obstacle_threshold_open(uint16_t current_ma);
+
+/**
+ * @brief Sets the current threshold for obstacle detection during closing.
+ *
+ * @param current_ma The current threshold in milliamps.
+ */
+void valve_set_obstacle_threshold_close(uint16_t current_ma);
+
+/**
+ * @brief Gets the current threshold for obstacle detection during opening.
+ *
+ * @return The current threshold in milliamps.
+ */
+uint16_t valve_get_obstacle_threshold_open(void);
+
+/**
+ * @brief Gets the current threshold for obstacle detection during closing.
+ *
+ * @return The current threshold in milliamps.
+ */
+uint16_t valve_get_obstacle_threshold_close(void);
+
+/**
+ * @brief Callback function called during valve opening with current readings.
+ *
+ * This is a weak function that can be overridden to provide custom handling
+ * of current readings during valve opening operations.
+ *
+ * @param current_ma The current reading in milliamps.
+ */
+void valve_current_open_callback(int current_ma);
+
+/**
+ * @brief Callback function called during valve closing with current readings.
+ *
+ * This is a weak function that can be overridden to provide custom handling
+ * of current readings during valve closing operations.
+ *
+ * @param current_ma The current reading in milliamps.
+ */
+void valve_current_close_callback(int current_ma);
+
+#endif // VALVE_H

software/include/lib/vnd7050aj.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2025, Eduard Iten
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_INCLUDE_DRIVERS_MISC_VND7050AJ_H_
+#define ZEPHYR_INCLUDE_DRIVERS_MISC_VND7050AJ_H_
+
+#include <zephyr/device.h>
+#include <zephyr/kernel.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Channel identifiers for the VND7050AJ.
+ */
+#define VND7050AJ_CHANNEL_0 0
+#define VND7050AJ_CHANNEL_1 1
+
+/**
+ * @brief Sets the state of a specific output channel.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @param channel The channel to control (VND7050AJ_CHANNEL_0 or VND7050AJ_CHANNEL_1).
+ * @param state The desired state (true for ON, false for OFF).
+ * @return 0 on success, negative error code on failure.
+ */
+int vnd7050aj_set_output_state(const struct device *dev, uint8_t channel, bool state);
+
+/**
+ * @brief Reads the load current for a specific channel.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @param channel The channel to measure (VND7050AJ_CHANNEL_0 or VND7050AJ_CHANNEL_1).
+ * @param[out] current_ma Pointer to store the measured current in milliamperes (mA).
+ * @return 0 on success, negative error code on failure.
+ */
+int vnd7050aj_read_load_current(const struct device *dev, uint8_t channel, int32_t *current_ma);
+
+/**
+ * @brief Reads the VCC supply voltage.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @param[out] voltage_mv Pointer to store the measured voltage in millivolts (mV).
+ * @return 0 on success, negative error code on failure.
+ */
+int vnd7050aj_read_supply_voltage(const struct device *dev, int32_t *voltage_mv);
+
+/**
+ * @brief Reads the internal chip temperature.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @param[out] temp_c Pointer to store the measured temperature in degrees Celsius (°C).
+ * @return 0 on success, negative error code on failure.
+ */
+int vnd7050aj_read_chip_temp(const struct device *dev, int32_t *temp_c);
+
+/**
+ * @brief Resets a latched fault condition.
+ *
+ * This function sends a low pulse to the FaultRST pin.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @return 0 on success, negative error code on failure.
+ */
+int vnd7050aj_reset_fault(const struct device *dev);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZEPHYR_INCLUDE_DRIVERS_MISC_VND7050AJ_H_ */

software/lib/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_subdirectory_ifdef(CONFIG_LIB_FWU fwu)
+add_subdirectory_ifdef(CONFIG_LIB_MODBUS_SERVER modbus_server)
+add_subdirectory_ifdef(CONFIG_LIB_VALVE valve)
+add_subdirectory_ifdef(CONFIG_SHELL_SYSTEM shell_system)
+add_subdirectory_ifdef(CONFIG_SHELL_MODBUS shell_modbus)
+add_subdirectory_ifdef(CONFIG_SHELL_VALVE shell_valve)
+add_subdirectory_ifdef(CONFIG_VND7050AJ vnd7050aj)

software/lib/Kconfig

@@ -0,0 +1,10 @@
+menu "Irrigation system software libraries"
+
+rsource "fwu/Kconfig"
+rsource "modbus_server/Kconfig"
+rsource "valve/Kconfig"
+rsource "shell_system/Kconfig"
+rsource "shell_modbus/Kconfig"
+rsource "shell_valve/Kconfig"
+rsource "vnd7050aj/Kconfig"
+endmenu

software/lib/fwu/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_library_sources(fwu.c)

software/lib/fwu/Kconfig

@@ -1,5 +1,5 @@
-config FWU
+config LIB_FWU
     bool "Enable Firmware Update Library"
     default y
     help
-      Enable the Firmware Update module.
+      Enable the Firmware Update Library.

software/lib/fwu/fwu.c

@@ -0,0 +1,64 @@
+/**
+ * @file fwu.c
+ * @brief Implementation of the Firmware Update (FWU) library.
+ *
+ * This file implements the logic for receiving a new firmware image in chunks
+ * over Modbus. It maintains a buffer for the incoming data, calculates the CRC
+ * of the received chunk, and handles commands to verify the chunk and finalize
+ * the update process. The actual writing to flash is simulated.
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/sys/byteorder.h>
+#include <zephyr/sys/crc.h>
+#include <lib/fwu.h>
+
+LOG_MODULE_REGISTER(fwu, LOG_LEVEL_INF);
+
+#define FWU_BUFFER_SIZE 256
+static uint8_t fwu_buffer[FWU_BUFFER_SIZE]; // Buffer to store incoming
+                                            // firmware data chunks
+static uint32_t fwu_chunk_offset = 0; // Offset for the current firmware chunk in the overall image
+static uint16_t fwu_chunk_size = 0; // Size of the current firmware chunk
+static uint16_t fwu_last_chunk_crc = 0; // CRC16 of the last received firmware chunk
+
+void fwu_init(void)
+{
+}
+
+void fwu_handler(uint16_t addr, uint16_t reg)
+{
+	// This is a simplified handler. In a real scenario, you would have a proper
+	// mapping between register addresses and actions.
+	if (addr == 0x0100) { // FWU_COMMAND
+		if (reg == 1) {
+			LOG_INF("FWU: Chunk at offset %u (size %u) verified.",
+			    fwu_chunk_offset,
+			    fwu_chunk_size);
+		} else if (reg == 2) {
+			LOG_INF("FWU: Finalize command received. Rebooting (simulated).");
+		}
+	} else if (addr == 0x0101) { // FWU_CHUNK_OFFSET_LOW
+		fwu_chunk_offset = (fwu_chunk_offset & 0xFFFF0000) | reg;
+	} else if (addr == 0x0102) { // FWU_CHUNK_OFFSET_HIGH
+		fwu_chunk_offset = (fwu_chunk_offset & 0x0000FFFF) | ((uint32_t)reg << 16);
+	} else if (addr == 0x0103) { // FWU_CHUNK_SIZE
+		fwu_chunk_size = (reg > FWU_BUFFER_SIZE) ? FWU_BUFFER_SIZE : reg;
+	} else if (addr >= 0x0180 && addr < (0x0180 + (FWU_BUFFER_SIZE / 2))) {
+		uint16_t index = (addr - 0x0180) * 2;
+		if (index < sizeof(fwu_buffer)) {
+			sys_put_be16(reg, &fwu_buffer[index]);
+			if (index + 2 >= fwu_chunk_size) {
+				fwu_last_chunk_crc =
+				    crc16_ccitt(0xffff, fwu_buffer, fwu_chunk_size);
+				LOG_INF("FWU: Chunk received, CRC is 0x%04X", fwu_last_chunk_crc);
+			}
+		}
+	}
+}
+
+uint16_t fwu_get_last_chunk_crc(void)
+{
+	return fwu_last_chunk_crc;
+}

software/lib/modbus_server/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_library_sources(modbus_server.c)

software/lib/modbus_server/Kconfig

@@ -0,0 +1,5 @@
+config LIB_MODBUS_SERVER
+    bool "Enable Modbus Server Library"
+    default n
+    help
+      Enable the Modbus Server Library.

software/lib/modbus_server/modbus_server.c

@@ -0,0 +1,295 @@
+/**
+ * @file modbus_server.c
+ * @brief Modbus RTU server implementation for the irrigation system slave node.
+ *
+ * This file implements the Modbus server logic, including register callbacks,
+ * watchdog handling, and dynamic reconfiguration. It interfaces with other
+ * libraries like valve control, ADC sensors, and firmware updates.
+ */
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/uart.h>
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/modbus/modbus.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/sys/reboot.h>
+#include <zephyr/usb/usb_device.h>
+#include <app_version.h>
+#include <lib/fwu.h>
+#include <lib/modbus_server.h>
+#include <lib/valve.h>
+#include <lib/vnd7050aj.h>
+
+LOG_MODULE_REGISTER(modbus_server, LOG_LEVEL_INF);
+
+static int modbus_iface;
+static struct modbus_iface_param server_param = {
+    .mode = MODBUS_MODE_RTU,
+    .server = {.user_cb = NULL, .unit_id = 1},
+    .serial = {.baud = 19200, .parity = UART_CFG_PARITY_NONE},
+};
+
+static uint16_t watchdog_timeout_s = 0;
+static struct k_timer watchdog_timer;
+
+/**
+ * @brief Timer handler for the Modbus watchdog.
+ *
+ * This function is called when the watchdog timer expires, indicating a loss
+ * of communication with the Modbus master. It triggers a fail-safe action,
+ * which is to close the valve.
+ *
+ * @param timer_id Pointer to the timer instance.
+ */
+static void watchdog_timer_handler(struct k_timer *timer_id)
+{
+	LOG_WRN("Modbus watchdog expired! Closing valve as a fail-safe.");
+	valve_close();
+}
+
+/**
+ * @brief Resets the Modbus watchdog timer.
+ *
+ * This function should be called upon receiving any valid Modbus request
+ * to prevent the watchdog from expiring.
+ */
+static inline void reset_watchdog(void)
+{
+	if (watchdog_timeout_s > 0) {
+		k_timer_start(&watchdog_timer, K_SECONDS(watchdog_timeout_s), K_NO_WAIT);
+	}
+}
+
+/**
+ * @brief Callback for reading Modbus holding registers.
+ *
+ * @param addr Register address.
+ * @param reg Pointer to store the read value.
+ * @return 0 on success.
+ */
+static int holding_reg_rd(uint16_t addr, uint16_t *reg)
+{
+	reset_watchdog();
+	switch (addr) {
+	case REG_HOLDING_MAX_OPENING_TIME_S:
+		*reg = valve_get_max_open_time();
+		break;
+	case REG_HOLDING_MAX_CLOSING_TIME_S:
+		*reg = valve_get_max_close_time();
+		break;
+	case REG_HOLDING_WATCHDOG_TIMEOUT_S:
+		*reg = watchdog_timeout_s;
+		break;
+	case REG_HOLDING_END_CURRENT_THRESHOLD_OPEN_MA:
+		*reg = valve_get_end_current_threshold_open();
+		break;
+	case REG_HOLDING_END_CURRENT_THRESHOLD_CLOSE_MA:
+		*reg = valve_get_end_current_threshold_close();
+		break;
+	case REG_HOLDING_OBSTACLE_THRESHOLD_OPEN_MA:
+		*reg = valve_get_obstacle_threshold_open();
+		break;
+	case REG_HOLDING_OBSTACLE_THRESHOLD_CLOSE_MA:
+		*reg = valve_get_obstacle_threshold_close();
+		break;
+	default:
+		*reg = 0;
+		break;
+	}
+	return 0;
+}
+
+/**
+ * @brief Callback for writing Modbus holding registers.
+ *
+ * @param addr Register address.
+ * @param reg Value to write.
+ * @return 0 on success.
+ */
+static int holding_reg_wr(uint16_t addr, uint16_t reg)
+{
+	reset_watchdog();
+	switch (addr) {
+	case REG_HOLDING_VALVE_COMMAND:
+		if (reg == 1) {
+			valve_open();
+		} else if (reg == 2) {
+			valve_close();
+		} else if (reg == 0) {
+			valve_stop();
+		}
+		break;
+	case REG_HOLDING_MAX_OPENING_TIME_S:
+		valve_set_max_open_time(reg);
+		break;
+	case REG_HOLDING_MAX_CLOSING_TIME_S:
+		valve_set_max_close_time(reg);
+		break;
+	case REG_HOLDING_END_CURRENT_THRESHOLD_OPEN_MA:
+		valve_set_end_current_threshold_open(reg);
+		break;
+	case REG_HOLDING_END_CURRENT_THRESHOLD_CLOSE_MA:
+		valve_set_end_current_threshold_close(reg);
+		break;
+	case REG_HOLDING_OBSTACLE_THRESHOLD_OPEN_MA:
+		valve_set_obstacle_threshold_open(reg);
+		break;
+	case REG_HOLDING_OBSTACLE_THRESHOLD_CLOSE_MA:
+		valve_set_obstacle_threshold_close(reg);
+		break;
+	case REG_HOLDING_WATCHDOG_TIMEOUT_S:
+		watchdog_timeout_s = reg;
+		if (watchdog_timeout_s > 0) {
+			LOG_INF("Watchdog enabled with %u s timeout.", watchdog_timeout_s);
+			reset_watchdog();
+		} else {
+			LOG_INF("Watchdog disabled.");
+			k_timer_stop(&watchdog_timer);
+		}
+		break;
+	case REG_HOLDING_DEVICE_RESET:
+		if (reg == 1) {
+			LOG_WRN("Modbus reset command received. Rebooting...");
+			sys_reboot(SYS_REBOOT_WARM);
+		}
+		break;
+	default:
+		fwu_handler(addr, reg);
+		break;
+	}
+	return 0;
+}
+
+/**
+ * @brief Callback for reading Modbus input registers.
+ *
+ * @param addr Register address.
+ * @param reg Pointer to store the read value.
+ * @return 0 on success.
+ */
+static int input_reg_rd(uint16_t addr, uint16_t *reg)
+{
+	reset_watchdog();
+	uint32_t uptime_s = k_uptime_get_32() / 1000;
+	switch (addr) {
+	case REG_INPUT_VALVE_STATE_MOVEMENT:
+		*reg = (valve_get_movement() << 8) | (valve_get_state() & 0xFF);
+		break;
+	case REG_INPUT_MOTOR_OPEN_CURRENT_MA:
+		*reg = (uint16_t)valve_get_opening_current();
+		break;
+	case REG_INPUT_MOTOR_CLOSE_CURRENT_MA:
+		*reg = (uint16_t)valve_get_closing_current();
+		break;
+	case REG_INPUT_UPTIME_SECONDS_LOW:
+		*reg = (uint16_t)(uptime_s & 0xFFFF);
+		break;
+	case REG_INPUT_UPTIME_SECONDS_HIGH:
+		*reg = (uint16_t)(uptime_s >> 16);
+		break;
+	case REG_INPUT_SUPPLY_VOLTAGE_MV:
+		*reg = (uint16_t)valve_get_vnd_voltage();
+		break;
+	case REG_INPUT_FWU_LAST_CHUNK_CRC:
+		*reg = fwu_get_last_chunk_crc();
+		break;
+	case REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR:
+		*reg = (APP_VERSION_MAJOR << 8) | APP_VERSION_MINOR;
+		break;
+	case REG_INPUT_FIRMWARE_VERSION_PATCH:
+		*reg = APP_PATCHLEVEL;
+		break;
+	default:
+		*reg = 0;
+		break;
+	}
+	return 0;
+}
+
+static struct modbus_user_callbacks mbs_cbs = {
+    // Modbus server callback functions
+    .holding_reg_rd = holding_reg_rd,
+    .holding_reg_wr = holding_reg_wr,
+    .input_reg_rd = input_reg_rd,
+};
+
+#define MODBUS_NODE DT_COMPAT_GET_ANY_STATUS_OKAY(zephyr_modbus_serial)
+
+int modbus_server_init(void)
+{
+	k_timer_init(&watchdog_timer, watchdog_timer_handler, NULL);
+
+	// Load saved settings
+	uint32_t saved_baudrate = 19200;
+	uint8_t saved_unit_id = 1;
+	settings_load_one("modbus/baudrate", &saved_baudrate, sizeof(saved_baudrate));
+	settings_load_one("modbus/unit_id", &saved_unit_id, sizeof(saved_unit_id));
+
+	// Apply loaded settings
+	server_param.serial.baud = saved_baudrate;
+	server_param.server.unit_id = saved_unit_id;
+
+	const char iface_name[] = {DEVICE_DT_NAME(MODBUS_NODE)};
+#if DT_NODE_HAS_COMPAT(DT_PARENT(MODBUS_NODE), zephyr_cdc_acm_uart)
+	const struct device *const dev = DEVICE_DT_GET(DT_PARENT(MODBUS_NODE));
+	uint32_t dtr = 0;
+
+	if (!device_is_ready(dev) || usb_enable(NULL)) {
+		return 0;
+	}
+
+	while (!dtr) {
+		uart_line_ctrl_get(dev, UART_LINE_CTRL_DTR, &dtr);
+		k_sleep(K_MSEC(100));
+	}
+
+	LOG_INF("Client connected to server on %s", dev->name);
+#endif
+	modbus_iface = modbus_iface_get_by_name(iface_name);
+	if (modbus_iface < 0) {
+		return modbus_iface;
+	}
+	server_param.server.user_cb = &mbs_cbs;
+
+	LOG_INF("Starting Modbus server: baudrate=%u, unit_id=%u", saved_baudrate, saved_unit_id);
+	return modbus_init_server(modbus_iface, server_param);
+}
+
+int modbus_reconfigure(uint32_t baudrate, uint8_t unit_id)
+{
+	// Update parameters
+	server_param.serial.baud = baudrate;
+	server_param.server.unit_id = unit_id;
+
+	// Try to reinitialize - this should work for most cases
+	int ret = modbus_init_server(modbus_iface, server_param);
+
+	if (ret == 0) {
+		settings_save_one("modbus/baudrate", &baudrate, sizeof(baudrate));
+		settings_save_one("modbus/unit_id", &unit_id, sizeof(unit_id));
+		LOG_INF("Modbus reconfigured: baudrate=%u, unit_id=%u", baudrate, unit_id);
+	} else {
+		LOG_ERR("Failed to reconfigure Modbus: %d", ret);
+		LOG_INF("Modbus reconfiguration requires restart to take effect");
+
+		// Save settings for next boot
+		settings_save_one("modbus/baudrate", &baudrate, sizeof(baudrate));
+		settings_save_one("modbus/unit_id", &unit_id, sizeof(unit_id));
+
+		LOG_INF("Settings saved. Type 'reset' to restart the device and apply the "
+		        "change.");
+		return 0; // Return success since settings are saved
+	}
+
+	return ret;
+}
+
+uint32_t modbus_get_baudrate(void)
+{
+	return server_param.serial.baud;
+}
+uint8_t modbus_get_unit_id(void)
+{
+	return server_param.server.unit_id;
+}

software/lib/shell_modbus/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_library_sources(shell_modbus.c)

software/lib/shell_modbus/Kconfig

@@ -0,0 +1,7 @@
+config SHELL_MODBUS
+    bool "Enable Shell Modbus"
+    default n
+    depends on SHELL
+    depends on LIB_MODBUS_SERVER
+    help
+      Enable the modbus shell commands.

software/lib/shell_modbus/shell_modbus.c

@@ -0,0 +1,120 @@
+/**
+ * @file shell_modbus.c
+ * @brief Provides shell commands for Modbus and valve configuration.
+ *
+ * This file implements a set of commands for the Zephyr shell to allow
+ * runtime configuration of the Modbus server (baudrate, slave ID) and the
+ * valve (max opening/closing times). The settings are persisted to non-volatile
+ * storage.
+ */
+
+#include <zephyr/shell/shell.h>
+#include <lib/modbus_server.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/**
+ * @brief Shell command to set the Modbus baudrate.
+ *
+ * @param sh The shell instance.
+ * @param argc Argument count.
+ * @param argv Argument values.
+ * @return 0 on success, -EINVAL on error.
+ */
+static int cmd_modbus_setb(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_error(sh, "Usage: setb <baudrate>");
+		return -EINVAL;
+	}
+
+	uint32_t new_baud = (uint32_t)strtoul(argv[1], NULL, 10);
+	const uint32_t valid_baud_rates[] = {1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200};
+	bool is_valid = false;
+
+	for (int i = 0; i < ARRAY_SIZE(valid_baud_rates); i++) {
+		if (new_baud == valid_baud_rates[i]) {
+			is_valid = true;
+			break;
+		}
+	}
+
+	if (!is_valid) {
+		char error_msg[128];
+		int offset =
+		    snprintf(error_msg, sizeof(error_msg), "Invalid baudrate. Valid rates are: ");
+		for (int i = 0; i < ARRAY_SIZE(valid_baud_rates); i++) {
+			offset += snprintf(error_msg + offset,
+			    sizeof(error_msg) - offset,
+			    "%u ",
+			    valid_baud_rates[i]);
+		}
+		shell_error(sh, "%s", error_msg);
+		return -EINVAL;
+	}
+
+	if (modbus_reconfigure(new_baud, modbus_get_unit_id()) != 0) {
+		shell_error(sh, "Failed to apply new baudrate");
+	} else {
+		shell_print(sh, "Modbus baudrate set to: %u (and saved)", new_baud);
+	}
+
+	return 0;
+}
+
+/**
+ * @brief Shell command to set the Modbus slave ID.
+ *
+ * @param sh The shell instance.
+ * @param argc Argument count.
+ * @param argv Argument values.
+ * @return 0 on success, -EINVAL on error.
+ */
+static int cmd_modbus_setid(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_error(sh, "Usage: setid <slave_id>");
+		return -EINVAL;
+	}
+
+	uint32_t new_id_u32 = (uint32_t)strtoul(argv[1], NULL, 10);
+	if (new_id_u32 == 0 || new_id_u32 > 247) {
+		shell_error(sh, "Invalid slave ID: %s. Must be between 1 and 247.", argv[1]);
+		return -EINVAL;
+	}
+	uint8_t new_id = (uint8_t)new_id_u32;
+
+	if (modbus_reconfigure(modbus_get_baudrate(), new_id) != 0) {
+		shell_error(sh, "Failed to apply new slave ID");
+	} else {
+		shell_print(sh, "Modbus slave ID set to: %u (and saved)", new_id);
+	}
+
+	return 0;
+}
+
+/**
+ * @brief Shell command to show the current Modbus configuration.
+ *
+ * @param sh The shell instance.
+ * @param argc Argument count.
+ * @param argv Argument values.
+ * @return 0 on success.
+ */
+static int cmd_modbus_show(const struct shell *sh, size_t argc, char **argv)
+{
+	const int label_width = 15;
+
+	shell_print(sh, "Modbus Settings:");
+	shell_print(sh, "%*s %u", label_width, "Baudrate:", modbus_get_baudrate());
+	shell_print(sh, "%*s %u", label_width, "Slave ID:", modbus_get_unit_id());
+	return 0;
+}
+
+SHELL_STATIC_SUBCMD_SET_CREATE(sub_modbus_cmds,
+    SHELL_CMD(setb, NULL, "Set Modbus baudrate", cmd_modbus_setb),
+    SHELL_CMD(setid, NULL, "Set Modbus slave ID", cmd_modbus_setid),
+    SHELL_CMD(show, NULL, "Show Modbus configuration", cmd_modbus_show),
+    SHELL_SUBCMD_SET_END);
+
+SHELL_CMD_REGISTER(modbus, &sub_modbus_cmds, "Modbus commands", NULL);

software/lib/shell_system/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_library_sources(shell_system.c)

software/lib/shell_system/Kconfig

@@ -0,0 +1,5 @@
+config SHELL_SYSTEM
+    bool "Enable Shell System"
+    default n
+    help
+      Enable the system commands.

software/lib/shell_system/shell_system.c

@@ -0,0 +1,31 @@
+/**
+ * @file shell_system.c
+ * @brief Provides basic system-level shell commands.
+ *
+ * This file implements essential system commands for the Zephyr shell,
+ * such as rebooting the device.
+ */
+
+#include <zephyr/shell/shell.h>
+#include <zephyr/sys/reboot.h>
+
+/**
+ * @brief Shell command to reset the system.
+ *
+ * This command performs a warm reboot of the device after a short delay
+ * to ensure the shell message is printed.
+ *
+ * @param sh The shell instance.
+ * @param argc Argument count.
+ * @param argv Argument values.
+ * @return 0 on success.
+ */
+static int cmd_reset(const struct shell *sh, size_t argc, char **argv)
+{
+	shell_print(sh, "Rebooting system...");
+	k_sleep(K_MSEC(100)); // Allow the shell to print the message
+	sys_reboot(SYS_REBOOT_WARM);
+	return 0;
+}
+
+SHELL_CMD_REGISTER(reset, NULL, "Reboot the system", cmd_reset);

software/lib/shell_valve/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_library_sources(shell_valve.c)

software/lib/shell_valve/Kconfig

@@ -0,0 +1,7 @@
+config SHELL_VALVE
+	bool "Shell Valve commands"
+    default n
+    depends on SHELL
+    depends on LIB_VALVE
+    help
+      Enable the valve shell commands.

software/lib/shell_valve/shell_valve.c

@@ -0,0 +1,185 @@
+#include <zephyr/kernel.h>
+#include <zephyr/shell/shell.h>
+#include <lib/valve.h>
+#include <stdlib.h>
+
+static int cmd_valve_set_open_t(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_open_t <seconds>");
+		return -EINVAL;
+	}
+
+	uint16_t seconds = (uint16_t)atoi(argv[1]);
+	valve_set_max_open_time(seconds);
+	shell_print(sh, "Max open time set to %u seconds.", seconds);
+	return 0;
+}
+
+static int cmd_valve_set_close_t(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_close_t <seconds>");
+		return -EINVAL;
+	}
+
+	uint16_t seconds = (uint16_t)atoi(argv[1]);
+	valve_set_max_close_time(seconds);
+	shell_print(sh, "Max close time set to %u seconds.", seconds);
+	return 0;
+}
+
+static int cmd_valve_set_end_curr_open(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_end_curr_open <milliamps>");
+		return -EINVAL;
+	}
+
+	uint16_t current_ma = (uint16_t)atoi(argv[1]);
+	valve_set_end_current_threshold_open(current_ma);
+	shell_print(sh, "End current threshold (open) set to %u mA.", current_ma);
+	return 0;
+}
+
+static int cmd_valve_set_end_curr_close(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_end_curr_close <milliamps>");
+		return -EINVAL;
+	}
+
+	uint16_t current_ma = (uint16_t)atoi(argv[1]);
+	valve_set_end_current_threshold_close(current_ma);
+	shell_print(sh, "End current threshold (close) set to %u mA.", current_ma);
+	return 0;
+}
+
+static int cmd_valve_set_obstacle_open(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_obstacle_open <milliamps>");
+		return -EINVAL;
+	}
+
+	uint16_t current_ma = (uint16_t)atoi(argv[1]);
+	valve_set_obstacle_threshold_open(current_ma);
+	shell_print(sh, "Obstacle threshold (open) set to %u mA.", current_ma);
+	return 0;
+}
+
+static int cmd_valve_set_obstacle_close(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_obstacle_close <milliamps>");
+		return -EINVAL;
+	}
+
+	uint16_t current_ma = (uint16_t)atoi(argv[1]);
+	valve_set_obstacle_threshold_close(current_ma);
+	shell_print(sh, "Obstacle threshold (close) set to %u mA.", current_ma);
+	return 0;
+}
+
+static int cmd_valve_show(const struct shell *sh, size_t argc, char **argv)
+{
+	const int label_width = 30;
+
+	shell_print(sh, "Valve Settings:");
+	shell_print(sh, "%*s %u s", label_width, "Max Open Time:", valve_get_max_open_time());
+	shell_print(sh, "%*s %u s", label_width, "Max Close Time:", valve_get_max_close_time());
+	shell_print(sh,
+	    "%*s %u mA",
+	    label_width,
+	    "End Current Threshold (Open):",
+	    valve_get_end_current_threshold_open());
+	shell_print(sh,
+	    "%*s %u mA",
+	    label_width,
+	    "End Current Threshold (Close):",
+	    valve_get_end_current_threshold_close());
+	shell_print(sh,
+	    "%*s %u mA",
+	    label_width,
+	    "Obstacle Threshold (Open):",
+	    valve_get_obstacle_threshold_open());
+	shell_print(sh,
+	    "%*s %u mA",
+	    label_width,
+	    "Obstacle Threshold (Close):",
+	    valve_get_obstacle_threshold_close());
+	return 0;
+}
+
+static int cmd_valve_open(const struct shell *sh, size_t argc, char **argv)
+{
+	ARG_UNUSED(argc);
+	ARG_UNUSED(argv);
+	if (valve_get_movement() != VALVE_MOVEMENT_IDLE) {
+		shell_print(sh, "Valve is already moving.");
+		return -EBUSY;
+	}
+
+	valve_open();
+	shell_print(sh, "Valve is opening.");
+	return 0;
+}
+
+static int cmd_valve_close(const struct shell *sh, size_t argc, char **argv)
+{
+	ARG_UNUSED(argc);
+	ARG_UNUSED(argv);
+	if (valve_get_movement() != VALVE_MOVEMENT_IDLE) {
+		shell_print(sh, "Valve is already moving.");
+		return -EBUSY;
+	}
+
+	valve_close();
+	shell_print(sh, "Valve is closing.");
+	return 0;
+}
+
+static int cmd_valve_stop(const struct shell *sh, size_t argc, char **argv)
+{
+	ARG_UNUSED(argc);
+	ARG_UNUSED(argv);
+	if (valve_get_movement() == VALVE_MOVEMENT_IDLE) {
+		shell_print(sh, "Valve is already stopped.");
+		return -EINVAL;
+	}
+
+	valve_stop();
+	shell_print(sh, "Valve movement stopped.");
+	return 0;
+}
+SHELL_STATIC_SUBCMD_SET_CREATE(sub_valve_settings,
+    SHELL_CMD(open_t, NULL, "Set max open time (seconds)", cmd_valve_set_open_t),
+    SHELL_CMD(close_t, NULL, "Set max close time (seconds)", cmd_valve_set_close_t),
+    SHELL_CMD(end_curr_open,
+        NULL,
+        "Set end current threshold for opening (mA)",
+        cmd_valve_set_end_curr_open),
+    SHELL_CMD(end_curr_close,
+        NULL,
+        "Set end current threshold for closing (mA)",
+        cmd_valve_set_end_curr_close),
+    SHELL_CMD(obstacle_curr_open,
+        NULL,
+        "Set obstacle threshold for opening (mA)",
+        cmd_valve_set_obstacle_open),
+    SHELL_CMD(obstacle_curr_close,
+        NULL,
+        "Set obstacle threshold for closing (mA)",
+        cmd_valve_set_obstacle_close),
+
+    SHELL_SUBCMD_SET_END);
+
+SHELL_STATIC_SUBCMD_SET_CREATE(valve_cmds,
+    SHELL_CMD(show, NULL, "Show valve configuration", cmd_valve_show),
+    SHELL_CMD(set, &sub_valve_settings, "Valve settings commands", NULL),
+    SHELL_CMD(open, NULL, "Open the valve", cmd_valve_open),
+    SHELL_CMD(close, NULL, "Close the valve", cmd_valve_close),
+    SHELL_CMD(stop, NULL, "Stop the valve movement", cmd_valve_stop),
+    SHELL_SUBCMD_SET_END);
+
+SHELL_CMD_REGISTER(valve, &valve_cmds, "Valve commands", NULL);

software/lib/valve/CMakeLists.txt

@@ -0,0 +1 @@
+zephyr_library_sources(valve.c)

software/lib/valve/Kconfig

@@ -0,0 +1,45 @@
+config LIB_VALVE
+    bool "Enable Valve Library"
+    default n
+    help
+      Enable the Valve Library.
+
+if LIB_VALVE
+config LOG_VALVE_LEVEL
+    int "Valve Log Level"
+    default 3
+    help
+      Set the log level for the Valve Library.
+      0 = None, 1 = Error, 2 = Warning, 3 = Info, 4 = Debug
+
+config VALVE_INTERVALL_CURRENT_CHECK_MS
+    int "Interval Current Check (ms)"
+    default 100
+    help
+      Set the interval in milliseconds for checking the motor current
+      during valve operation. This is used to detect obstacles.
+
+config VALVE_INITIAL_INTERVALL_CURRENT_CHECK_MS
+    int "Initial Current Check (ms)"
+    default 200
+    help
+      Set the initial delay in milliseconds before the first current check
+      after starting the valve operation. This allows the motor to stabilize. 
+
+config VALVE_OBSTACLE_THRESHOLD_OPEN_MA
+    int "Obstacle Threshold Open (mA)"
+    default 200
+    help
+      Set the current threshold in milliamps for obstacle detection
+      during valve opening. If the motor current exceeds this value,
+      an obstacle is detected and the valve stops.
+
+config VALVE_OBSTACLE_THRESHOLD_CLOSE_MA
+    int "Obstacle Threshold Close (mA)"
+    default 200
+    help
+      Set the current threshold in milliamps for obstacle detection
+      during vaslve closing. If the motor current exceeds this value,
+      an obstacle is detected and the valve stops.
+
+endif # LIB_VALVE

software/lib/valve/valve.c

@@ -0,0 +1,304 @@
+/**
+ * @file valve.c
+ * @brief Implementation of the motorized valve control library.
+ *
+ * This file contains the logic for controlling a motorized valve using a
+ * VND7050AJ high-side driver. It uses a delayed work item to handle the
+ * safety timeouts for opening and closing operations.
+ */
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/settings/settings.h>
+#include <lib/valve.h>
+#include <lib/vnd7050aj.h>
+
+#define VND_NODE DT_ALIAS(vnd7050aj)
+#if !DT_NODE_HAS_STATUS(VND_NODE, okay)
+#error VND7050AJ node is not defined or enabled
+#endif
+const struct device *vnd7050aj_dev = DEVICE_DT_GET(VND_NODE);
+
+LOG_MODULE_REGISTER(valve, CONFIG_LOG_VALVE_LEVEL);
+
+static enum valve_state current_state = VALVE_STATE_OPEN;
+static enum valve_movement current_movement = VALVE_MOVEMENT_IDLE;
+static uint16_t max_opening_time_s = 10;
+static uint16_t max_closing_time_s = 10;
+static uint16_t end_current_threshold_open_ma = 10;
+static uint16_t end_current_threshold_close_ma = 10;
+static uint16_t obstacle_threshold_open_ma = CONFIG_VALVE_OBSTACLE_THRESHOLD_OPEN_MA;
+static uint16_t obstacle_threshold_close_ma = CONFIG_VALVE_OBSTACLE_THRESHOLD_CLOSE_MA;
+static struct k_work_delayable valve_work;
+static struct k_timer movement_timer;
+
+/**
+ * @brief Work handler for end position checks of the valve.
+ *
+ * This function is called periodically to check if the valve has reached its
+ * end position. It reads the current load on the motor and determines if the
+ * valve has reached its target position.
+ *
+ * @param work Pointer to the k_work item.
+ */
+static void valve_work_handler(struct k_work *work)
+{
+	int current_ma = 0;
+
+	if (current_movement == VALVE_MOVEMENT_OPENING) {
+		vnd7050aj_read_load_current(vnd7050aj_dev, VALVE_CHANNEL_OPEN, &current_ma);
+		valve_current_open_callback(current_ma);
+		if (current_ma > obstacle_threshold_open_ma) {
+			LOG_ERR(
+			    "Obstacle detected during opening (current: %d mA), stopping motor.",
+			    current_ma);
+			current_movement = VALVE_MOVEMENT_ERROR;
+			valve_stop();
+			return;
+		} else if (current_ma > end_current_threshold_open_ma) {
+			k_work_schedule(&valve_work, VALVE_CURRENT_CHECK_INTERVAL);
+			return;
+		}
+		LOG_DBG("Valve finished opening");
+	} else if (current_movement == VALVE_MOVEMENT_CLOSING) {
+		vnd7050aj_read_load_current(vnd7050aj_dev, VALVE_CHANNEL_CLOSE, &current_ma);
+		valve_current_close_callback(current_ma);
+		if (current_ma > obstacle_threshold_close_ma) {
+			LOG_ERR(
+			    "Obstacle detected during closing (current: %d mA), stopping motor.",
+			    current_ma);
+			current_movement = VALVE_MOVEMENT_ERROR;
+			valve_stop();
+			return;
+		} else if (current_ma > end_current_threshold_close_ma) {
+			k_work_schedule(&valve_work, VALVE_CURRENT_CHECK_INTERVAL);
+			return;
+		}
+		current_state = VALVE_STATE_CLOSED;
+		LOG_DBG("Valve finished closing");
+	}
+	current_movement = VALVE_MOVEMENT_IDLE;
+
+	valve_stop();
+}
+
+/**
+ * @brief Timer handler for valve movement timeouts.
+ *
+ * This function is called when the maximum allowed time for valve movement
+ * (opening or closing) has been reached. It stops the valve motor, cancels
+ * any pending end-position checks, and sets the movement status to error.
+ *
+ * @param timer Pointer to the k_timer instance that expired.
+ */
+void movement_timeout_handler(struct k_timer *timer)
+{
+	// Stop the end position check if the timer expires
+	k_work_cancel_delayable(&valve_work);
+	if (current_movement == VALVE_MOVEMENT_OPENING) {
+		LOG_WRN("Valve opening timeout reached, stopping motor.");
+		current_movement = VALVE_MOVEMENT_ERROR;
+	} else if (current_movement == VALVE_MOVEMENT_CLOSING) {
+		LOG_WRN("Valve closing timeout reached, stopping motor.");
+		current_movement = VALVE_MOVEMENT_ERROR;
+	}
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_OPEN, false);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_CLOSE, false);
+	current_state = VALVE_STATE_OPEN;
+	current_movement = VALVE_MOVEMENT_IDLE;
+}
+
+int valve_init(void)
+{
+	if (!device_is_ready(vnd7050aj_dev)) {
+		LOG_ERR("VND7050AJ device is not ready");
+		return -ENODEV;
+	}
+
+	k_work_init_delayable(&valve_work, valve_work_handler);
+	k_timer_init(&movement_timer, movement_timeout_handler, NULL);
+
+	settings_load_one("valve/max_open_time", &max_opening_time_s, sizeof(max_opening_time_s));
+	settings_load_one("valve/max_close_time", &max_closing_time_s, sizeof(max_closing_time_s));
+	settings_load_one("valve/end_current_threshold_open",
+	    &end_current_threshold_open_ma,
+	    sizeof(end_current_threshold_open_ma));
+	settings_load_one("valve/end_current_threshold_close",
+	    &end_current_threshold_close_ma,
+	    sizeof(end_current_threshold_close_ma));
+	settings_load_one("valve/obstacle_threshold_open",
+	    &obstacle_threshold_open_ma,
+	    sizeof(obstacle_threshold_open_ma));
+	settings_load_one("valve/obstacle_threshold_close",
+	    &obstacle_threshold_close_ma,
+	    sizeof(obstacle_threshold_close_ma));
+
+	LOG_INF("Valve initialized: max_open=%us, max_close=%us, end_curr_open=%umA, "
+	        "end_curr_close=%umA, obs_open=%umA, obs_close=%umA",
+	    max_opening_time_s,
+	    max_closing_time_s,
+	    end_current_threshold_open_ma,
+	    end_current_threshold_close_ma,
+	    obstacle_threshold_open_ma,
+	    obstacle_threshold_close_ma);
+	valve_close();
+	return 0;
+}
+
+void valve_open(void)
+{
+	LOG_DBG("Opening valve");
+	vnd7050aj_reset_fault(vnd7050aj_dev);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_CLOSE, false);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_OPEN, true);
+	current_state =
+	    VALVE_STATE_OPEN; /* Security: assume valve open as soon as it starts opening */
+	current_movement = VALVE_MOVEMENT_OPENING;
+	if (max_opening_time_s > 0) {
+		k_timer_start(&movement_timer, K_SECONDS(max_opening_time_s), K_NO_WAIT);
+	}
+	k_work_schedule(&valve_work, VALVE_INITIAL_CURRENT_CHECK_INTERVAL);
+}
+
+void valve_close(void)
+{
+	LOG_DBG("Closing valve");
+	vnd7050aj_reset_fault(vnd7050aj_dev);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_OPEN, false);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_CLOSE, true);
+	if (max_closing_time_s > 0) {
+		k_timer_start(&movement_timer, K_SECONDS(max_closing_time_s), K_NO_WAIT);
+	}
+	current_movement = VALVE_MOVEMENT_CLOSING;
+	k_work_schedule(&valve_work, VALVE_INITIAL_CURRENT_CHECK_INTERVAL);
+}
+
+void valve_stop(void)
+{
+	k_work_cancel_delayable(&valve_work);
+	k_timer_stop(&movement_timer);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_OPEN, false);
+	vnd7050aj_set_output_state(vnd7050aj_dev, VALVE_CHANNEL_CLOSE, false);
+	current_movement = VALVE_MOVEMENT_IDLE;
+}
+
+enum valve_state valve_get_state(void)
+{
+	return current_state;
+}
+enum valve_movement valve_get_movement(void)
+{
+	return current_movement;
+}
+
+void valve_set_max_open_time(uint16_t seconds)
+{
+	max_opening_time_s = seconds;
+	settings_save_one("valve/max_open_time", &max_opening_time_s, sizeof(max_opening_time_s));
+}
+void valve_set_max_close_time(uint16_t seconds)
+{
+	max_closing_time_s = seconds;
+	settings_save_one("valve/max_close_time", &max_closing_time_s, sizeof(max_closing_time_s));
+}
+
+void valve_set_end_current_threshold_open(uint16_t current_ma)
+{
+	end_current_threshold_open_ma = current_ma;
+	settings_save_one("valve/end_current_threshold_open",
+	    &end_current_threshold_open_ma,
+	    sizeof(end_current_threshold_open_ma));
+}
+
+void valve_set_end_current_threshold_close(uint16_t current_ma)
+{
+	end_current_threshold_close_ma = current_ma;
+	settings_save_one("valve/end_current_threshold_close",
+	    &end_current_threshold_close_ma,
+	    sizeof(end_current_threshold_close_ma));
+}
+
+uint16_t valve_get_max_open_time(void)
+{
+	return max_opening_time_s;
+}
+uint16_t valve_get_max_close_time(void)
+{
+	return max_closing_time_s;
+}
+
+uint16_t valve_get_end_current_threshold_open(void)
+{
+	return end_current_threshold_open_ma;
+}
+
+uint16_t valve_get_end_current_threshold_close(void)
+{
+	return end_current_threshold_close_ma;
+}
+
+int32_t valve_get_opening_current(void)
+{
+	int32_t current;
+	vnd7050aj_read_load_current(vnd7050aj_dev, VALVE_CHANNEL_OPEN, &current);
+	return current;
+}
+
+int32_t valve_get_closing_current(void)
+{
+	int32_t current;
+	vnd7050aj_read_load_current(vnd7050aj_dev, VALVE_CHANNEL_CLOSE, &current);
+	return current;
+}
+
+int32_t valve_get_vnd_temp(void)
+{
+	int32_t temp_c;
+	vnd7050aj_read_chip_temp(vnd7050aj_dev, &temp_c);
+	return temp_c;
+}
+
+int32_t valve_get_vnd_voltage(void)
+{
+	int32_t voltage_mv;
+	vnd7050aj_read_supply_voltage(vnd7050aj_dev, &voltage_mv);
+	return voltage_mv;
+}
+
+void valve_set_obstacle_threshold_open(uint16_t current_ma)
+{
+	obstacle_threshold_open_ma = current_ma;
+	settings_save_one("valve/obstacle_threshold_open",
+	    &obstacle_threshold_open_ma,
+	    sizeof(obstacle_threshold_open_ma));
+}
+
+void valve_set_obstacle_threshold_close(uint16_t current_ma)
+{
+	obstacle_threshold_close_ma = current_ma;
+	settings_save_one("valve/obstacle_threshold_close",
+	    &obstacle_threshold_close_ma,
+	    sizeof(obstacle_threshold_close_ma));
+}
+
+uint16_t valve_get_obstacle_threshold_open(void)
+{
+	return obstacle_threshold_open_ma;
+}
+
+uint16_t valve_get_obstacle_threshold_close(void)
+{
+	return obstacle_threshold_close_ma;
+}
+
+__weak void valve_current_open_callback(int current_ma)
+{
+	LOG_DBG("Open current callback: %d mA", current_ma);
+}
+
+__weak void valve_current_close_callback(int current_ma)
+{
+	LOG_DBG("Close current callback: %d mA", current_ma);
+}