defunct: playing around with bootloaders

- Corrected device tree overlays to prevent MCUboot and app overlap
- MCUboot now at 0x8000000 (32KB), app at 0x8008000 (96KB)
- Successfully boots MCUboot which chains to application
- Shell and reset command working properly
- Black Magic Probe flashing confirmed working for both domains

.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.

.vscode/settings.json

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

README.de.md

@@ -1,3 +1,5 @@
+<img src="./docs/img/logo.png" alt="Logo" width="100"/>
+
 🇩🇪 Deutsch | [🇬🇧 English](README.md) | [🇫🇷 Français](README.fr.md) | [🇪🇸 Español](README.es.md)
 
 # Modulares Bewässerungssystem
@@ -11,6 +13,8 @@ Die detaillierte Dokumentation befindet sich im Verzeichnis [`docs/`](./docs/):
 *   **[Konzept](./docs/concept.de.md)**: Beschreibt die Systemarchitektur, die verwendeten Komponenten und die grundlegenden Design-Entscheidungen.
 *   **[MODBUS Register](./docs/modbus-registers.de.md)**: Definiert die Register-Map für die Kommunikation mit den Slave-Nodes.
 *   **[Projektplan](./docs/planning.de.md)**: Enthält den Entwicklungs- und Implementierungsplan.
+*   **[Firmware-Handbuch](./docs/firmware-manual.de.md)**: Beschreibt den Funktionsumfang und die Bedienung der Slave-Node-Firmware.
+*   **[Modbus Test-Tool](./software/tools/modbus_tool/README.de.md)**: Anleitung für das Python-basierte Kommandozeilen-Tool zum Testen der Slaves.
 
 ## Schnellstart
 

README.es.md

@@ -1,3 +1,5 @@
+<img src="./docs/img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](README.de.md) | [🇬🇧 English](README.md) | [🇫🇷 Français](README.fr.md) | 🇪🇸 Español
 
 # Sistema de riego modular

README.fr.md

@@ -1,3 +1,5 @@
+<img src="./docs/img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](README.de.md) | [🇬🇧 English](README.md) | 🇫🇷 Français | [🇪🇸 Español](README.es.md)
 
 # Système d'irrigation modulaire

README.md

@@ -1,3 +1,5 @@
+<img src="./docs/img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](README.de.md) | 🇬🇧 English | [🇫🇷 Français](README.fr.md) | [🇪🇸 Español](README.es.md)
 
 # Modular Irrigation System

docs/concept.de.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 🇩🇪 Deutsch | [🇬🇧 English](concept.en.md) | [🇫🇷 Français](concept.fr.md) | [🇪🇸 Español](concept.es.md)
 
 # Konzept: Modulares Bewässerungssystem

docs/concept.en.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](concept.de.md) | 🇬🇧 English | [🇫🇷 Français](concept.fr.md) | [🇪🇸 Español](concept.es.md)
 
 # Concept: Modular Irrigation System

docs/concept.es.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](concept.de.md) | [🇬🇧 English](concept.en.md) | [🇫🇷 Français](concept.fr.md) | 🇪🇸 Español
 
 # Concepto: Sistema de riego modular

docs/concept.fr.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](concept.de.md) | [🇬🇧 English](concept.en.md) | 🇫🇷 Français | [🇪🇸 Español](concept.es.md)
 
 # Concept : Système d'irrigation modulaire

docs/img/logo.svg

@@ -0,0 +1,16 @@
+<svg width="100" height="120" viewBox="0 0 100 120" xmlns="http://www.w3.org/2000/svg" aria-labelledby="logoTitle">
+  <title id="logoTitle">Logo: Wassertropfen mit integriertem Chip</title>
+  
+  <path 
+    d="M50 115 C 85 85, 95 65, 95 45 A 45 45 0 1 0 5 45 C 5 65, 15 85, 50 115 Z" 
+    fill="#2563EB" 
+  />
+  
+  <g fill="#FFFFFF">
+    <rect x="25" y="35" width="50" height="8" rx="2"/>
+    <rect x="25" y="50" width="35" height="8" rx="2"/>
+    <rect x="70" y="50" width="5" height="8" rx="2"/>
+    <rect x="25" y="65" width="50" height="8" rx="2"/>
+  </g>
+  
+</svg>

docs/modbus-registers.de.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 🇩🇪 Deutsch | [🇬🇧 English](modbus-registers.en.md) | [🇫🇷 Français](modbus-registers.fr.md) | [🇪🇸 Español](modbus-registers.es.md)
 
 # MODBUS Register Map Definition v1.0
@@ -36,6 +38,7 @@ Alle Register sind in einer einzigen, durchgehenden Liste pro Register-Typ (`Inp
 | **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.                                                                                                                  |
+| **0x00F5** | `SUPPLY_VOLTAGE_MV`            | System            | Aktuelle Versorgungsspannung in Millivolt (mV).                                                                                           |
 | **0x0100** | `FWU_LAST_CHUNK_CRC`           | Firmware-Update   | Enthält den CRC16 des zuletzt im Puffer empfangenen Daten-Chunks.                                                                         |
 
 ## 3. Holding Registers (4xxxx, Read/Write)
@@ -47,6 +50,7 @@ Alle Register sind in einer einzigen, durchgehenden Liste pro Register-Typ (`Inp
 | **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.                                                                                                          |

docs/modbus-registers.en.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](modbus-registers.de.md) | 🇬🇧 English | [🇫🇷 Français](modbus-registers.fr.md) | [🇪🇸 Español](modbus-registers.es.md)
 
 # MODBUS Register Map Definition v1.0

docs/modbus-registers.es.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](modbus-registers.de.md) | [🇬🇧 English](modbus-registers.en.md) | [🇫🇷 Français](modbus-registers.fr.md) | 🇪🇸 Español
 
 # Definición del mapa de registros MODBUS v1.0

docs/modbus-registers.fr.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](modbus-registers.de.md) | [🇬🇧 English](modbus-registers.en.md) | 🇫🇷 Français | [🇪🇸 Español](modbus-registers.es.md)
 
 # Définition de la carte des registres MODBUS v1.0

docs/planning.de.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 🇩🇪 Deutsch | [🇬🇧 English](planning.en.md) | [🇫🇷 Français](planning.fr.md) | [🇪🇸 Español](planning.es.md)
 
 # Projektplan: Modulares Bewässerungssystem

docs/planning.en.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](planning.de.md) | 🇬🇧 English | [🇫🇷 Français](planning.fr.md) | [🇪🇸 Español](planning.es.md)
 
 # Project Plan: Modular Irrigation System

docs/planning.es.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](planning.de.md) | [🇬🇧 English](planning.en.md) | [🇫🇷 Français](planning.fr.md) | 🇪🇸 Español
 
 # Plan del proyecto: Sistema de riego modular

docs/planning.fr.md

@@ -1,3 +1,5 @@
+<img src="./img/logo.png" alt="Logo" width="100"/>
+
 [🇩🇪 Deutsch](planning.de.md) | [🇬🇧 English](planning.en.md) | 🇫🇷 Français | [🇪🇸 Español](planning.es.md)
 
 # Plan de projet : Système d'irrigation modulaire

software/.vscode/settings.json

@@ -8,5 +8,10 @@
 
 		// File Associations
 		"files.associations": {
+			"array": "c",
+			"string_view": "c",
+			"initializer_list": "c",
+			"span": "c",
+			"format": "c"
 		}
 }

software/Kconfig

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

software/apps/adc_dt/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(ADC)
+
+target_sources(app PRIVATE src/main.c)

software/apps/adc_dt/README.rst

@@ -0,0 +1,62 @@
+.. zephyr:code-sample:: adc_dt
+   :name: Analog-to-Digital Converter (ADC) with devicetree
+   :relevant-api: adc_interface
+
+   Read analog inputs from ADC channels.
+
+Overview
+********
+
+This sample demonstrates how to use the :ref:`ADC driver API <adc_api>`.
+
+Depending on the target board, it reads ADC samples from one or more channels
+and prints the readings on the console. If voltage of the used reference can
+be obtained, the raw readings are converted to millivolts.
+
+The pins of the ADC channels are board-specific. Please refer to the board
+or MCU datasheet for further details.
+
+Building and Running
+********************
+
+The ADC peripheral and pinmux is configured in the board's ``.dts`` file. Make
+sure that the ADC is enabled (``status = "okay";``).
+
+In addition to that, this sample requires an ADC channel specified in the
+``io-channels`` property of the ``zephyr,user`` node. This is usually done with
+a devicetree overlay. The example overlay in the ``boards`` subdirectory for
+the ``nucleo_l073rz`` board can be easily adjusted for other boards.
+
+Configuration of channels (settings like gain, reference, or acquisition time)
+also needs to be specified in devicetree, in ADC controller child nodes. Also
+the ADC resolution and oversampling setting (if used) need to be specified
+there. See :zephyr_file:`boards/nrf52840dk_nrf52840.overlay
+<samples/drivers/adc/adc_dt/boards/nrf52840dk_nrf52840.overlay>` for an example of
+such setup.
+
+Building and Running for ST Nucleo L073RZ
+=========================================
+
+The sample can be built and executed for the
+:zephyr:board:`nucleo_l073rz` as follows:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/drivers/adc/adc_dt
+   :board: nucleo_l073rz
+   :goals: build flash
+   :compact:
+
+To build for another board, change "nucleo_l073rz" above to that board's name
+and provide a corresponding devicetree overlay.
+
+Sample output
+=============
+
+You should get a similar output as below, repeated every second:
+
+.. code-block:: console
+
+   ADC reading:
+   - ADC_0, channel 7: 36 = 65mV
+
+.. note:: If the ADC is not supported, the output will be an error message.

software/apps/adc_dt/boards/weact_stm32g431_core.overlay

@@ -0,0 +1,38 @@
+/ {
+	vdd_sense: voltage-divider {
+		compatible = "voltage-divider";
+		/*
+		 * This reference must provide one argument (the channel number)
+		 * because of the "#io-channel-cells = <1>" in the &adc1 node.
+		 */
+		io-channels = <&adc1 1>;
+		output-ohms = <2200>;
+		full-ohms = <3200>;
+	};
+};
+
+&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>;
+	/*
+	 * This line is required by the st,stm32-adc driver binding.
+	 * It declares that references to its channels need one extra argument.
+	 */
+	#io-channel-cells = <1>;
+
+	adc_channel_1: channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/adc_dt/prj.conf

@@ -0,0 +1,4 @@
+CONFIG_ADC=y
+CONFIG_SENSOR=y
+CONFIG_VOLTAGE_DIVIDER=y
+CONFIG_LOG=y

software/apps/adc_dt/sample.yaml

@@ -0,0 +1,53 @@
+sample:
+  name: ADC devicetree driver sample
+tests:
+  sample.drivers.adc.adc_dt:
+    tags:
+      - adc
+    depends_on: adc
+    platform_allow:
+      - nucleo_l073rz
+      - disco_l475_iot1
+      - cc3220sf_launchxl
+      - cc3235sf_launchxl
+      - cy8cproto_063_ble
+      - stm32l496g_disco
+      - stm32h735g_disco
+      - nrf51dk/nrf51822
+      - nrf52840dk/nrf52840
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54h20dk/nrf54h20/cpuapp
+      - ophelia4ev/nrf54l15/cpuapp
+      - mec172xevb_assy6906
+      - gd32f350r_eval
+      - gd32f450i_eval
+      - gd32vf103v_eval
+      - gd32f403z_eval
+      - esp32_devkitc/esp32/procpu
+      - esp32s2_saola
+      - esp32c3_devkitm
+      - gd32l233r_eval
+      - lpcxpresso55s36
+      - mr_canhubk3
+      - longan_nano
+      - longan_nano/gd32vf103/lite
+      - rd_rw612_bga
+      - frdm_mcxn947/mcxn947/cpu0
+      - mcx_n9xx_evk/mcxn947/cpu0
+      - frdm_mcxc242
+      - ucans32k1sic
+      - xg24_rb4187c
+      - xg29_rb4412a
+      - raytac_an54l15q_db/nrf54l15/cpuapp
+      - frdm_mcxa166
+      - frdm_mcxa276
+    integration_platforms:
+      - nucleo_l073rz
+      - nrf52840dk/nrf52840
+    harness: console
+    timeout: 10
+    harness_config:
+      type: multi_line
+      regex:
+        - "ADC reading\\[\\d+\\]:"
+        - "- .+, channel \\d+: -?\\d+"

software/apps/adc_dt/socs/esp32_procpu.overlay

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2022 Wolter HV <wolterhv@gmx.de>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 0>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_4";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/adc_dt/socs/esp32c3.overlay

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2022 Wolter HV <wolterhv@gmx.de>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 0>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_4";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/adc_dt/socs/esp32s2.overlay

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2022 Wolter HV <wolterhv@gmx.de>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 0>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_4";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/adc_dt/socs/esp32s3_procpu.overlay

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2022 Wolter HV <wolterhv@gmx.de>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 0>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_4";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

software/apps/adc_dt/src/main.c

@@ -0,0 +1,45 @@
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+#include <zephyr/devicetree.h>
+#include <zephyr/drivers/sensor.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_REGISTER(adc_dt_example, LOG_LEVEL_DBG);
+
+/* Get the voltage divider device */
+#define VOLTAGE_DIVIDER_NODE DT_NODELABEL(vdd_sense)
+
+int main(void)
+{
+	const struct device *vdd_dev = DEVICE_DT_GET(VOLTAGE_DIVIDER_NODE);
+	struct sensor_value val;
+	int err;
+
+	if (!device_is_ready(vdd_dev)) {
+		LOG_ERR("Voltage divider device not ready");
+		return 0;
+	}
+
+	LOG_INF("Voltage divider device ready!");
+
+	while (1) {
+		err = sensor_sample_fetch(vdd_dev);
+		if (err < 0) {
+			LOG_ERR("Could not fetch sample (%d)", err);
+			k_sleep(K_MSEC(1000));
+			continue;
+		}
+
+		err = sensor_channel_get(vdd_dev, SENSOR_CHAN_VOLTAGE, &val);
+		if (err < 0) {
+			LOG_ERR("Could not get channel (%d)", err);
+			k_sleep(K_MSEC(1000));
+			continue;
+		}
+
+		LOG_INF("Voltage reading: %d.%06d V", val.val1, val.val2);
+
+		k_sleep(K_MSEC(1000));
+	}
+	return 0;
+}

software/apps/adc_test/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.20)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(adc_test)
+
+target_sources(app PRIVATE src/main.c)

software/apps/adc_test/boards/weact_stm32g431_core.overlay

@@ -0,0 +1,8 @@
+&adc1 {
+    pinctrl-0 = <&adc1_in1_pa0>;
+    pinctrl-names = "default";
+    status = "okay";
+
+    st,adc-clock-source = "SYNC";
+    st,adc-prescaler = <4>;
+};

software/apps/adc_test/prj.conf

@@ -0,0 +1,3 @@
+CONFIG_ADC=y
+CONFIG_ADC_STM32=y
+CONFIG_LOG=y

software/apps/adc_test/src/main.c

@@ -0,0 +1,73 @@
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/adc.h>
+#include <zephyr/device.h>
+#include <zephyr/sys/printk.h>
+
+// ADC-Knoten holen
+static const struct device *adc_dev = DEVICE_DT_GET(DT_NODELABEL(adc1));
+
+// Kanaldefinitionen
+#define MY_SIGNAL_CHANNEL   1  // PA0
+#define ADC_VREFINT_CHANNEL 18 // Intern
+
+// Puffer für ZWEI Messwerte
+static int16_t sample_buffer[2];
+
+void main(void)
+{
+    int err;
+    // Die VREFINT-Spannung in mV aus dem Datenblatt deines Controllers
+    #define VREFINT_MV 1212
+
+    printk("*** ADC Ratiometric Measurement (Single Sequence) ***\n");
+
+    if (!device_is_ready(adc_dev)) {
+        printk("ADC device not ready!\n");
+        return;
+    }
+
+    // --- Einmaliges Setup der beiden Kanäle ---
+    const struct adc_channel_cfg signal_channel_cfg = {
+        .gain             = ADC_GAIN_1,
+        .reference        = ADC_REF_INTERNAL,
+        .acquisition_time = ADC_ACQ_TIME_DEFAULT, // Kurz für niederohmige Quellen
+        .channel_id       = MY_SIGNAL_CHANNEL,
+    };
+    const struct adc_channel_cfg vrefint_channel_cfg = {
+        .gain             = ADC_GAIN_1,
+        .reference        = ADC_REF_INTERNAL,
+        .acquisition_time = ADC_ACQ_TIME_MAX, // Lang für VREFINT
+        .channel_id       = ADC_VREFINT_CHANNEL,
+    };
+
+    adc_channel_setup(adc_dev, &signal_channel_cfg);
+    adc_channel_setup(adc_dev, &vrefint_channel_cfg);
+
+    // --- EINE Sequenz, die BEIDE Kanäle enthält ---
+    const struct adc_sequence sequence = {
+        .channels    = BIT(MY_SIGNAL_CHANNEL) | BIT(ADC_VREFINT_CHANNEL),
+        .buffer      = sample_buffer,
+        .buffer_size = sizeof(sample_buffer),
+        .resolution  = 12,
+    };
+
+    while (1) {
+        err = adc_read(adc_dev, &sequence);
+        if (err != 0) {
+            printk("ADC read failed with code %d\n", err);
+        } else {
+            // Die Ergebnisse sind in der Reihenfolge der Kanalnummern im Puffer
+            // Kanal 1 (MY_SIGNAL_CHANNEL) kommt vor Kanal 18 (ADC_VREFINT_CHANNEL)
+            int16_t signal_raw = sample_buffer[0];
+            int16_t vrefint_raw = sample_buffer[1];
+
+            // Ratiometrische Berechnung
+            int32_t signal_mv = (int32_t)signal_raw * VREFINT_MV / vrefint_raw;
+
+            printk("Signal: raw=%4d  |  VREFINT: raw=%4d  |  Calculated Voltage: %d mV\n",
+                   signal_raw, vrefint_raw, signal_mv);
+        }
+
+        k_msleep(2000);
+    }
+}

software/apps/adc_test/src/main.c2

@@ -0,0 +1,80 @@
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/adc.h>
+#include <zephyr/device.h>
+
+// Definiere die Kanäle
+#define ADC_VREFINT_CHANNEL 18 // Muss mit dem DTS übereinstimmen
+#define MY_SIGNAL_CHANNEL   1  // Muss mit dem pinctrl im DTS übereinstimmen
+
+// ADC Device
+static const struct device *adc_dev = DEVICE_DT_GET(DT_NODELABEL(adc1));
+
+// ADC Kanal Konfigurationen
+static const struct adc_channel_cfg vrefint_channel_cfg = {
+    .gain             = ADC_GAIN_1,
+    .reference        = ADC_REF_INTERNAL, // Bedeutet VDDA
+    .acquisition_time = ADC_ACQ_TIME_MAX,
+    .channel_id       = ADC_VREFINT_CHANNEL,
+    .differential     = 0,
+};
+
+static const struct adc_channel_cfg signal_channel_cfg = {
+    .gain             = ADC_GAIN_1,
+    .reference        = ADC_REF_INTERNAL, // Bedeutet VDDA
+    .acquisition_time = ADC_ACQ_TIME_MAX,
+    .channel_id       = MY_SIGNAL_CHANNEL,
+    .differential     = 0,
+};
+
+// Puffer für die Messwerte
+#define BUFFER_SIZE 1
+static int16_t sample_buffer[BUFFER_SIZE];
+
+// Sequenz für die Messungen
+struct adc_sequence sequence_vrefint = {
+    .channels    = BIT(ADC_VREFINT_CHANNEL),
+    .buffer      = sample_buffer,
+    .buffer_size = sizeof(sample_buffer),
+    .resolution  = 12, // STM32G4 hat 12-bit
+};
+
+struct adc_sequence sequence_signal = {
+    .channels    = BIT(MY_SIGNAL_CHANNEL),
+    .buffer      = sample_buffer,
+    .buffer_size = sizeof(sample_buffer),
+    .resolution  = 12,
+};
+
+
+void main(void) {
+    if (!device_is_ready(adc_dev)) {
+        printk("ADC device not found\n");
+        return;
+    }
+
+    // Kanäle konfigurieren
+    adc_channel_setup(adc_dev, &vrefint_channel_cfg);
+    adc_channel_setup(adc_dev, &signal_channel_cfg);
+
+    while (1) {
+        // 1. VREFINT messen zur Kalibrierung
+        adc_read(adc_dev, &sequence_vrefint);
+        int16_t vrefint_raw = sample_buffer[0];
+
+        // 2. Dein eigentliches Signal messen
+        adc_read(adc_dev, &sequence_signal);
+        int16_t signal_raw = sample_buffer[0];
+
+        // 3. Spannung berechnen
+        // VREFINT Wert für STM32G431 bei 3.0V Vdda ist typ. 1.212V (1212 mV)
+        // Überprüfe den genauen Wert im Datenblatt für deinen Controller!
+        #define VREFINT_MV 1212 
+        
+        int32_t signal_mv = (int32_t)signal_raw * VREFINT_MV / vrefint_raw;
+
+        printk("VREFINT raw: %d, Signal raw: %d, Calculated Voltage: %d mV\n", 
+               vrefint_raw, signal_raw, signal_mv);
+
+        k_msleep(1000);
+    }
+}

software/apps/adc_test/src/main.tabby

@@ -0,0 +1,38 @@
+#include <zephyr.h>
+#include <drivers/adc.h>
+
+#define PA0_PIN 0x04
+#define ADC_CHANNEL 0x03
+
+int main(void) {
+    int16_t adc_value = 0;
+
+    // Initialize the ADC
+    adc_config_t adc_config;
+    adc_config.mode = ADC_MODE_SINGLE_SHOT;
+    adc_config.channel = ADC_CHANNEL_PA0;
+    adc_config.sampling_rate = ADC_SAMP_RATE_1MS;
+
+    adc_config.data_rate = ADC_DATA_RATE_4MS;
+    adc_config.aux = ADC_AUX_ALL;
+
+    adc_config.atten = ADC_ATTEN_DB_11;
+    adc_config.ref = ADC_REF_INTERNAL;
+
+    adc_config.cal = ADC_CAL_ALL;
+
+    if (adc_config_data(&adc_config, &adc_context) < 0) {
+        zephyr_printf("Failed to configure ADC\n");
+        return -1;
+    }
+
+    // Read the analog input value
+    if (adc_read(&adc_context, &adc_value) < 0) {
+        zephyr_printf("Failed to read ADC value\n");
+        return -1;
+    }
+
+    zephyr_printf("ADC Value: %d\n", adc_value);
+
+    return 0;
+}

software/apps/firmware_node/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.20)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(firmware_node LANGUAGES C)
+zephyr_include_directories(../../include)
+add_subdirectory(../../lib lib)
+target_sources(app PRIVATE src/main.c)

software/apps/firmware_node/README.md

@@ -0,0 +1,34 @@
+# Firmware Node Application
+
+This Zephyr application provides firmware management capabilities for the irrigation system.
+
+**Tested on Zephyr 4.1.99**
+
+## Features
+
+### Step 1: Shell with Reset Command
+- Shell interface with custom "reset" command
+- Warm reboot functionality
+
+### Planned Features
+- MCUboot support with partition manager
+- Firmware version display
+- MCUmgr support for OTA updates
+
+## Building
+
+```bash
+west build -p auto -b weact_stm32g431_core apps/firmware_node -- -DBOARD_FLASH_RUNNER=blackmagicprobe
+```
+
+## Flashing
+
+```bash
+west flash
+```
+
+## Usage
+
+Connect to the device via serial console and use the shell:
+- `reset` - Reboot the system
+- `help` - Show available commands

software/apps/firmware_node/boards/flash_partitions_128kb.dtsi

@@ -0,0 +1,29 @@
+/*
+ * Flash partition layout for STM32G431 (128KB total flash)
+ * MCUboot + single application slot configuration
+ */
+
+&flash0 {
+        partitions {
+                compatible = "fixed-partitions";
+                #address-cells = <1>;
+                #size-cells = <1>;
+
+                boot_partition: partition@0 {
+                        label = "mcuboot";
+                        reg = <0x00000000 0x0000A000>; /* 40 KB for MCUboot */
+                        read-only;
+                };
+
+                slot0_partition: partition@A000 {
+                        label = "image-0";
+                        reg = <0x0000A000 0x00016000>; /* 88 KB for application */
+                };
+        };
+};
+
+/ {
+	chosen {
+		zephyr,code-partition = &slot0_partition;
+	};
+};

software/apps/firmware_node/boards/weact_stm32g431_core.conf

@@ -0,0 +1,2 @@
+# Board specific configuration for weact_stm32g431_core
+# This file can be used for board-specific overrides if needed

software/apps/firmware_node/boards/weact_stm32g431_core.overlay

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "flash_partitions_128kb.dtsi"

software/apps/firmware_node/boards/weact_stm32g431_core_mcuboot.overlay

@@ -0,0 +1,18 @@
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x00000000 0x00008000>; /* 32 KB */
+			read-only;
+		};
+
+		slot0_partition: partition@8000 {
+			label = "image-0";
+			reg = <0x00008000 0x00018000>; /* 96 KB */
+		};
+	};
+};

software/apps/firmware_node/pm.yml

@@ -0,0 +1,25 @@
+# Partition manager configuration for firmware_node
+
+# Boot partition (MCUboot)
+mcuboot_primary:
+  address: 0x00000000
+  size: 0x8000
+  region: flash_primary
+
+# Application partition (primary slot)
+mcuboot_primary_app:
+  address: 0x00008000
+  size: 0x18000
+  region: flash_primary
+
+# Secondary slot for updates
+mcuboot_secondary:
+  address: 0x00020000
+  size: 0x18000
+  region: flash_primary
+
+# Settings partition
+settings_partition:
+  address: 0x00038000
+  size: 0x8000
+  region: flash_primary

software/apps/firmware_node/prj.conf

@@ -0,0 +1,21 @@
+# Enable Console and printk for logging
+CONFIG_CONSOLE=y
+CONFIG_LOG=y
+CONFIG_LOG_PROCESS_THREAD=y
+
+# Enable Shell
+CONFIG_SHELL=y
+CONFIG_REBOOT=y
+
+# Enable the reset command
+CONFIG_KERNEL_SHELL=y
+
+# Enable settings for persistent storage
+CONFIG_SETTINGS=y
+CONFIG_SETTINGS_NVS=y
+CONFIG_NVS=y
+
+# Enable Flash and Flash Map for image trailer manipulation
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_FLASH_PAGE_LAYOUT=y

software/apps/firmware_node/src/main.c

@@ -0,0 +1,167 @@
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/shell/shell.h>
+#include <zephyr/sys/reboot.h>
+#include <zephyr/drivers/flash.h>
+#include <zephyr/storage/flash_map.h>
+#include <zephyr/devicetree.h>
+
+LOG_MODULE_REGISTER(firmware_node, LOG_LEVEL_INF);
+
+// Image header magic number (from MCUboot)
+#define IMAGE_MAGIC 0x96f3b83d
+#define IMAGE_HEADER_SIZE 32
+
+// Function to invalidate current image and trigger serial recovery
+static int invalidate_current_image(void)
+{
+    const struct flash_area *fa;
+    int rc;
+
+    // Get the flash area for the current image slot (slot0_partition)
+    rc = flash_area_open(FIXED_PARTITION_ID(slot0_partition), &fa);
+    if (rc != 0) {
+        LOG_ERR("Failed to open flash area: %d", rc);
+        return rc;
+    }
+
+    // Ensure the flash area is valid
+    if (fa->fa_id != FIXED_PARTITION_ID(slot0_partition)) {
+        LOG_ERR("Invalid flash area ID: %d", fa->fa_id);
+        flash_area_close(fa);
+        return -EINVAL;
+    }
+
+    // Get the flash device associated with this area
+    // This is necessary to perform erase operations
+
+    const struct device *flash_dev = flash_area_get_device(fa);
+    if (flash_dev == NULL) {
+        LOG_ERR("Failed to get flash device for area");
+        flash_area_close(fa);
+        return -ENODEV;
+    }
+
+    struct flash_pages_info page_info;
+    off_t last_block_offset;
+
+    // Find the last block of the flash area
+    rc = flash_get_page_info_by_offs(flash_dev, fa->fa_off + fa->fa_size - 1, &page_info);
+    if (rc != 0) {
+        LOG_ERR("Failed to get page info: %d", rc);
+        flash_area_close(fa);
+        return rc;
+    }
+
+    // Calculate the last block offset
+    rc = flash_get_page_info_by_offs(flash_dev, fa->fa_off + fa->fa_size - 1, &page_info);
+    if (rc != 0) {
+        LOG_ERR("Failed to get page info: %d", rc);
+        flash_area_close(fa);
+        return rc;
+    }
+    last_block_offset = page_info.start_offset;
+
+   // Convert absolute flash offset to relative offset within the flash area
+   off_t relative_offset = last_block_offset - fa->fa_off;
+   
+   // Erase the image trailer/metadata at the end of the partition
+   LOG_INF("Erasing image trailer at absolute offset: %ld, relative offset: %ld, size: %d bytes", 
+           last_block_offset, relative_offset, page_info.size);
+   rc = flash_area_erase(fa, relative_offset, page_info.size);
+   if (rc != 0) {
+       LOG_ERR("Failed to erase image trailer: %d", rc);
+  
+   } else {
+       LOG_INF("Image trailer erased successfully");
+   }
+   
+   flash_area_close(fa);
+   return rc;
+}
+// Custom reset command handler
+static int cmd_reset(const struct shell *shell, size_t argc, char **argv)
+{
+    ARG_UNUSED(argc);
+    ARG_UNUSED(argv);
+    
+    shell_print(shell, "Resetting system...");
+    k_msleep(100); // Give time for the message to be sent
+    sys_reboot(SYS_REBOOT_COLD);
+    
+    return 0;
+}
+
+// MCUboot serial recovery command handler
+static int cmd_recovery(const struct shell *shell, size_t argc, char **argv)
+{
+    ARG_UNUSED(argc);
+    ARG_UNUSED(argv);
+    
+    shell_print(shell, "Entering MCUboot serial recovery mode...");
+    shell_print(shell, "Corrupting current image magic to trigger recovery...");
+    
+    // Invalidate the current image by corrupting its header
+    int rc = invalidate_current_image();
+    if (rc != 0) {
+        shell_error(shell, "Failed to invalidate image: %d", rc);
+        return rc;
+    }
+    
+    shell_print(shell, "Image magic corrupted. System will reset and MCUboot will detect bad image.");
+    shell_print(shell, "MCUboot should show error and wait for recovery.");
+    k_msleep(100); // Give time for the message to be sent
+    
+    // Reset the system - MCUboot will detect invalid image and enter serial recovery
+    // log_process(true);
+    // sys_reboot(SYS_REBOOT_COLD);
+    
+    return 0;
+}
+
+// Command to show firmware info
+static int cmd_info(const struct shell *shell, size_t argc, char **argv)
+{
+    ARG_UNUSED(argc);
+    ARG_UNUSED(argv);
+    
+    const struct flash_area *fa;
+    int rc = flash_area_open(FIXED_PARTITION_ID(slot0_partition), &fa);
+    
+    if (rc != 0) {
+        shell_error(shell, "Failed to open flash area: %d", rc);
+        return rc;
+    }
+    
+    // Read the first few bytes to check the image header
+    uint32_t magic;
+    rc = flash_area_read(fa, 0, &magic, sizeof(magic));
+    if (rc == 0) {
+        shell_print(shell, "Image magic: 0x%08x", magic);
+        if (magic == IMAGE_MAGIC) {
+            shell_print(shell, "Image header is valid");
+            shell_print(shell, "Image starts at flash offset: 0x%lx", (unsigned long)fa->fa_off);
+            shell_print(shell, "Image partition size: %d bytes", fa->fa_size);
+        } else {
+            shell_print(shell, "Image header is INVALID (expected 0x%08x)", IMAGE_MAGIC);
+        }
+    } else {
+        shell_error(shell, "Failed to read image header: %d", rc);
+    }
+    
+    flash_area_close(fa);
+    return 0;
+}
+
+SHELL_CMD_REGISTER(reset, NULL, "Reset the system", cmd_reset);
+SHELL_CMD_REGISTER(recovery, NULL, "Enter MCUboot serial recovery mode", cmd_recovery);
+SHELL_CMD_REGISTER(info, NULL, "Show firmware info", cmd_info);
+
+int main(void)
+{
+    LOG_INF("Firmware Node starting up");
+    LOG_INF("Shell with reset command available");
+    LOG_INF("Serial recovery command available");
+
+    return 0;
+}

software/apps/firmware_node/sysbuild.cmake

@@ -0,0 +1,4 @@
+# Sysbuild configuration for firmware_node with MCUboot
+
+# Enable MCUboot as bootloader
+set(SB_CONFIG_BOOTLOADER_MCUBOOT TRUE)

software/apps/firmware_node/sysbuild.conf

@@ -0,0 +1,5 @@
+# Sysbuild configuration for firmware_node with MCUboot
+
+# Enable MCUboot as bootloader
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_MCUBOOT_MODE_SINGLE_APP=y

software/apps/firmware_node/sysbuild/firmware_node.overlay

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "../boards/flash_partitions_128kb.dtsi"
+
+/ {
+	chosen {
+		zephyr,code-partition = &slot0_partition;
+	};
+};

software/apps/firmware_node/sysbuild/mcuboot.conf

@@ -0,0 +1,31 @@
+# MCUboot configuration for firmware_node
+# Enable basic console and logging for debugging
+CONFIG_LOG=y
+CONFIG_BOOT_BANNER=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+CONFIG_PRINTK=y
+
+# Single slot configuration (no upgrades)
+CONFIG_SINGLE_APPLICATION_SLOT=y
+
+# Enable serial recovery mode (temporarily commented out for debugging)
+# CONFIG_MCUBOOT_SERIAL=y
+# CONFIG_BOOT_SERIAL_UART=y
+# CONFIG_BOOT_SERIAL_DETECT_PORT=y
+
+# Disable signature validation for testing to save space
+CONFIG_BOOT_SIGNATURE_TYPE_NONE=y
+
+# Size optimizations to fit in 40KB flash
+CONFIG_SIZE_OPTIMIZATIONS=y
+CONFIG_CBPRINTF_NANO=y
+CONFIG_MINIMAL_LIBC=y
+CONFIG_ASSERT=n
+
+# Disable debug features for size
+CONFIG_DEBUG_INFO=n
+CONFIG_DEBUG_OPTIMIZATIONS=n
+
+# Minimal heap for size optimization
+CONFIG_HEAP_MEM_POOL_SIZE=0

software/apps/firmware_node/sysbuild/mcuboot.overlay

@@ -0,0 +1,12 @@
+/*
+ * MCUboot device tree overlay for firmware_node
+ * Uses shared flash partition layout
+ */
+
+#include "../boards/flash_partitions_128kb.dtsi"
+
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
+};

software/apps/firmware_node/sysbuild/mcuboot/boards/weact_stm32g431_core.overlay

@@ -0,0 +1,33 @@
+/*
+ * MCUboot specific overlay for weact_stm32g431_core
+ * This overlay defines flash partitions for MCUboot
+ */
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x00000000 0x00008000>;
+		};
+		slot0_partition: partition@8000 {
+			label = "image-0";
+			reg = <0x00008000 0x0000E000>;
+		};
+		slot1_partition: partition@16000 {
+			label = "image-1";
+			reg = <0x00016000 0x0000E000>;
+		};
+		storage_partition: partition@24000 {
+			label = "storage";
+			reg = <0x00024000 0x00004000>;
+		};
+	};
+};
+
+&chosen {
+	zephyr,boot-partition = &boot_partition;
+};

software/apps/slave_node/CMakeLists.txt

@@ -1,9 +1,8 @@
 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)
 
-target_sources(app PRIVATE src/main.c src/shell_modbus.c src/shell_system.c)
+project(slave_node LANGUAGES C)
+zephyr_include_directories(../../include)
+add_subdirectory(../../lib lib)
+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/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/slave_node/boards/weact_stm32g431_core.overlay

@@ -0,0 +1,64 @@
+/ {
+    vnd7050aj: vnd7050aj {
+        compatible = "vnd7050aj-valve-controller";
+        status = "okay";
+        
+        // VND7050AJ GPIO pin definitions
+        in0-gpios = <&gpiob 7 GPIO_ACTIVE_HIGH>; // IN0 (PB7) - Input 0 control signal
+        in1-gpios = <&gpiob 9 GPIO_ACTIVE_HIGH>; // IN1 (PB9) - Input 1 control signal
+        rst-gpios = <&gpiob 3 GPIO_ACTIVE_HIGH>; // RST (PB3) - Reset pin for VND7050AJ
+        sen-gpios = <&gpiob 4 GPIO_ACTIVE_HIGH>; // SEN (PB4) - Sense Enable for current monitoring
+        s0-gpios = <&gpiob 6 GPIO_ACTIVE_HIGH>;  // S0 (PB6) - Status/Select 0 output from VND7050AJ
+        s1-gpios = <&gpiob 5 GPIO_ACTIVE_HIGH>;  // S1 (PB5) - Status/Select 1 output from VND7050AJ
+    };
+};
+
+&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";
+};
+
+&adc1 {
+    status = "okay";
+    pinctrl-0 = <&adc1_in1_pa0 &adc1_in15_pb0>;
+    pinctrl-names = "default";
+    st,adc-clock-source = "SYNC";
+    st,adc-prescaler = <1>;
+    #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_MAX>;  // Use maximum acquisition time for stability
+        zephyr,resolution = <12>;
+        zephyr,vref-mv = <2048>;  // STM32G431 VREFBUF at 2.048V
+    };
+
+    channel@15 {
+        reg = <15>;
+        zephyr,gain = "ADC_GAIN_1";
+        zephyr,reference = "ADC_REF_INTERNAL";
+        zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+        zephyr,resolution = <12>;
+        zephyr,vref-mv = <2048>;  // STM32G431 VREFBUF at 2.048V
+    };
+};
+
+&pinctrl {
+    // Pinmux für PA0 als ADC1_IN1 (Analogmodus)
+    adc1_in1_pa0: adc1_in1_pa0 {
+        pinmux = <STM32_PINMUX('A', 0, ANALOG)>; // PA0 in den Analogmodus setzen
+    };
+
+    // Pinmux für PB0 als ADC1_IN15 (Analogmodus) - for lab supply testing
+    adc1_in15_pb0: adc1_in15_pb0 {
+        pinmux = <STM32_PINMUX('B', 0, ANALOG)>; // PB0 in den Analogmodus setzen
+    };
+};

software/apps/slave_node/cdc-acm.overlay

@@ -0,0 +1,14 @@
+&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/vnd7050aj-valve-controller.yaml

@@ -0,0 +1,35 @@
+# VND7050AJ Valve Controller binding
+description: VND7050AJ valve controller GPIO configuration
+
+compatible: "vnd7050aj-valve-controller"
+
+properties:
+  in0-gpios:
+    type: phandle-array
+    description: GPIO for IN0 control signal
+    required: true
+
+  in1-gpios:
+    type: phandle-array
+    description: GPIO for IN1 control signal
+    required: true
+
+  rst-gpios:
+    type: phandle-array
+    description: GPIO for reset pin
+    required: true
+
+  sen-gpios:
+    type: phandle-array
+    description: GPIO for sense enable pin
+    required: true
+
+  s0-gpios:
+    type: phandle-array
+    description: GPIO for select 0 pin
+    required: true
+
+  s1-gpios:
+    type: phandle-array
+    description: GPIO for select 1 pin
+    required: true

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

@@ -2,16 +2,8 @@
 CONFIG_CONSOLE=y
 CONFIG_LOG=y
 
-# Disable UART console
-CONFIG_UART_CONSOLE=n
-
-# Enable RTT console
-CONFIG_RTT_CONSOLE=y
-CONFIG_USE_SEGGER_RTT=y
-
 # Enable Shell
 CONFIG_SHELL=y
-CONFIG_SHELL_BACKEND_RTT=y
 CONFIG_REBOOT=y
 
 # Enable Settings Subsystem
@@ -27,3 +19,9 @@ CONFIG_SETTINGS_LOG_LEVEL_DBG=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
 CONFIG_MODBUS=y
 CONFIG_MODBUS_ROLE_SERVER=y
+CONFIG_MODBUS_BUFFER_SIZE=256
+
+# Enable ADC driver
+CONFIG_ADC=y
+CONFIG_ADC_STM32=y
+

software/apps/slave_node/src/main.c

@@ -1,352 +1,35 @@
-/*
- * Copyright (c) 2020 PHYTEC Messtechnik GmbH
- * Copyright (c) 2022 Nordic Semiconductor ASA
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
 #include <zephyr/kernel.h>
-#include <zephyr/sys/util.h>
-#include <zephyr/drivers/gpio.h>
-#include <zephyr/modbus/modbus.h>
-#include <zephyr/usb/usb_device.h>
 #include <zephyr/settings/settings.h>
-
 #include <zephyr/logging/log.h>
-#include "modbus_bridge.h"
+#include <lib/modbus_server.h>
+#include <lib/valve.h>
+#include <lib/fwu.h>
 
-LOG_MODULE_REGISTER(mbs_sample, LOG_LEVEL_INF);
+LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
-
-#define APP_VERSION_MAJOR 1
-#define APP_VERSION_MINOR 0
-#define APP_VERSION_PATCH 0
-
-enum {
-	REG_INPUT_VALVE_STATE_MOVEMENT        = 0x0000,
-	REG_INPUT_MOTOR_CURRENT_MA            = 0x0001,
-	REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR = 0x00F0,
-	REG_INPUT_FIRMWARE_VERSION_PATCH      = 0x00F1,
-	REG_INPUT_DEVICE_STATUS               = 0x00F2,
-	REG_INPUT_UPTIME_SECONDS_LOW          = 0x00F3,
-	REG_INPUT_UPTIME_SECONDS_HIGH         = 0x00F4,
-};
-
-enum {
-	REG_HOLDING_VALVE_COMMAND             = 0x0000,
-	REG_HOLDING_MAX_OPENING_TIME_S        = 0x0001,
-	REG_HOLDING_MAX_CLOSING_TIME_S        = 0x0002,
-	REG_HOLDING_WATCHDOG_TIMEOUT_S        = 0x00F0,
-};
-
-enum valve_state {
-    VALVE_STATE_CLOSED,
-    VALVE_STATE_OPEN,
-};
-
-enum valve_movement {
-    VALVE_MOVEMENT_IDLE,
-    VALVE_MOVEMENT_OPENING,
-    VALVE_MOVEMENT_CLOSING,
-    VALVE_MOVEMENT_ERROR,
-};
-
-static enum valve_state current_state = VALVE_STATE_CLOSED;
-static enum valve_movement current_movement = VALVE_MOVEMENT_IDLE;
-static uint16_t max_opening_time_s = 60;
-static uint16_t max_closing_time_s = 60;
-static uint16_t watchdog_timeout_s;
-static int modbus_iface;
-
-static struct k_work_delayable valve_work;
-
-static struct modbus_iface_param server_param = {
-	.mode = MODBUS_MODE_RTU,
-	.server = {
-		.user_cb = NULL, // Will be set later
-		.unit_id = 1,
-	},
-	.serial = {
-		.baud = 19200,
-		.parity = UART_CFG_PARITY_NONE,
-	},
-};
-
-static void valve_work_handler(struct k_work *work)
-{
-    if (current_movement == VALVE_MOVEMENT_OPENING) {
-        LOG_INF("Virtual valve finished opening");
-    } else if (current_movement == VALVE_MOVEMENT_CLOSING) {
-        current_state = VALVE_STATE_CLOSED;
-        LOG_INF("Virtual valve finished closing");
-    }
-    current_movement = VALVE_MOVEMENT_IDLE;
-}
-
-
-static int coil_rd(uint16_t addr, bool *state)
-{
-	*state = true;
-	LOG_INF("Coil read, addr %u, %d", addr, (int)*state);
-	return 0;
-}
-
-static int coil_wr(uint16_t addr, bool state)
-{
-	LOG_INF("Coil write, addr %u, %d", addr, (int)state);
-	return 0;
-}
-
-static int holding_reg_rd(uint16_t addr, uint16_t *reg)
-{
-	switch (addr) {
-	case REG_HOLDING_MAX_OPENING_TIME_S:
-		*reg = max_opening_time_s;
-		break;
-	case REG_HOLDING_MAX_CLOSING_TIME_S:
-		*reg = max_closing_time_s;
-		break;
-	case REG_HOLDING_WATCHDOG_TIMEOUT_S:
-		*reg = watchdog_timeout_s;
-		break;
-	default:
-		*reg = 0;
-		break;
-	}
-
-	LOG_INF("Holding register read, addr %u, value %u", addr, *reg);
-	return 0;
-}
-
-static int holding_reg_wr(uint16_t addr, uint16_t reg)
-{
-	switch (addr) {
-	case REG_HOLDING_VALVE_COMMAND:
-		if (reg == 1) { /* Open */
-            if (current_state == VALVE_STATE_CLOSED) {
-                current_state = VALVE_STATE_OPEN;
-                current_movement = VALVE_MOVEMENT_OPENING;
-                LOG_INF("Virtual valve opening...");
-                k_work_schedule(&valve_work, K_MSEC(max_opening_time_s * 1000 * 0.9));
-            }
-		} else if (reg == 2) { /* Close */
-            if (current_state == VALVE_STATE_OPEN) {
-                current_movement = VALVE_MOVEMENT_CLOSING;
-                LOG_INF("Virtual valve closing...");
-                k_work_schedule(&valve_work, K_MSEC(max_closing_time_s * 1000 * 0.9));
-            }
-		} else if (reg == 0) { /* Stop */
-            k_work_cancel_delayable(&valve_work);
-			current_movement = VALVE_MOVEMENT_IDLE;
-			LOG_INF("Virtual valve movement stopped");
-		}
-		break;
-	case REG_HOLDING_MAX_OPENING_TIME_S:
-		max_opening_time_s = reg;
-        settings_save_one("valve/max_open_time", &max_opening_time_s, sizeof(max_opening_time_s));
-		break;
-	case REG_HOLDING_MAX_CLOSING_TIME_S:
-		max_closing_time_s = reg;
-        settings_save_one("valve/max_close_time", &max_closing_time_s, sizeof(max_closing_time_s));
-		break;
-	case REG_HOLDING_WATCHDOG_TIMEOUT_S:
-		watchdog_timeout_s = reg;
-		break;
-	default:
-		break;
-	}
-
-	LOG_INF("Holding register write, addr %u, value %u", addr, reg);
-	return 0;
-}
-
-static int input_reg_rd(uint16_t addr, uint16_t *reg)
-{
-	uint32_t uptime_s = k_uptime_get_32() / 1000;
-
-	switch (addr) {
-	case REG_INPUT_VALVE_STATE_MOVEMENT:
-		*reg = (current_movement << 8) | (current_state & 0xFF);
-		break;
-	case REG_INPUT_MOTOR_CURRENT_MA:
-		*reg = 50; /* Dummy value */
-		break;
-	case REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR:
-		*reg = (APP_VERSION_MAJOR << 8) | (APP_VERSION_MINOR & 0xFF);
-		break;
-	case REG_INPUT_FIRMWARE_VERSION_PATCH:
-		*reg = APP_VERSION_PATCH;
-		break;
-	case REG_INPUT_DEVICE_STATUS:
-		*reg = 0; /* 0 = OK */
-		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;
-	default:
-		*reg = 0;
-		break;
-	}
-
-	LOG_INF("Input register read, addr %u, value %u", addr, *reg);
-	return 0;
-}
-
-static struct modbus_user_callbacks mbs_cbs = {
-	.coil_rd = coil_rd,
-	.coil_wr = coil_wr,
-	.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_reconfigure(uint32_t baudrate, uint8_t unit_id)
-{
-	int err;
-
-	LOG_INF("Reconfiguring Modbus: baudrate=%u, id=%u", baudrate, unit_id);
-
-	err = modbus_disable(modbus_iface);
-	if (err) {
-		LOG_ERR("Failed to disable Modbus: %d", err);
-		return err;
-	}
-
-	server_param.serial.baud = baudrate;
-	server_param.server.unit_id = unit_id;
-
-	err = modbus_init_server(modbus_iface, server_param);
-	if (err) {
-		LOG_ERR("Failed to re-init Modbus server: %d", err);
-		return err;
-	}
-
-	return 0;
-}
-
-uint32_t modbus_get_baudrate(void)
-{
-	return server_param.serial.baud;
-}
-
-uint8_t modbus_get_unit_id(void)
-{
-	return server_param.server.unit_id;
-}
-
-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));
-}
-
-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;
-}
-
-static int settings_load_cb(const char *name, size_t len,
-                                settings_read_cb read_cb, void *cb_arg)
-{
-    const char *next;
-    int rc;
-
-    if (settings_name_steq(name, "baudrate", &next) && !next) {
-        rc = read_cb(cb_arg, &server_param.serial.baud, sizeof(server_param.serial.baud));
-        if (rc < 0) {
-            return rc;
-        }
-        LOG_INF("Loaded modbus/baudrate: %u", server_param.serial.baud);
-        return 0;
-    }
-
-    if (settings_name_steq(name, "unit_id", &next) && !next) {
-        rc = read_cb(cb_arg, &server_param.server.unit_id, sizeof(server_param.server.unit_id));
-        if (rc < 0) {
-            return rc;
-        }
-        LOG_INF("Loaded modbus/unit_id: %u", server_param.server.unit_id);
-        return 0;
-    }
-
-    if (settings_name_steq(name, "max_open_time", &next) && !next) {
-        rc = read_cb(cb_arg, &max_opening_time_s, sizeof(max_opening_time_s));
-        if (rc < 0) {
-            return rc;
-        }
-        LOG_INF("Loaded valve/max_open_time: %u", max_opening_time_s);
-        return 0;
-    }
-
-    if (settings_name_steq(name, "max_close_time", &next) && !next) {
-        rc = read_cb(cb_arg, &max_closing_time_s, sizeof(max_closing_time_s));
-        if (rc < 0) {
-            return rc;
-        }
-        LOG_INF("Loaded valve/max_close_time: %u", max_closing_time_s);
-        return 0;
-    }
-
-    return -ENOENT;
-}
-
-SETTINGS_STATIC_HANDLER_DEFINE(modbus, "modbus", NULL, settings_load_cb, NULL, NULL);
-SETTINGS_STATIC_HANDLER_DEFINE(valve, "valve", NULL, settings_load_cb, NULL, NULL);
-
-
-static int init_modbus_server(void)
-{
-	const char iface_name[] = {DEVICE_DT_NAME(MODBUS_NODE)};
-
-	modbus_iface = modbus_iface_get_by_name(iface_name);
-	if (modbus_iface < 0) {
-		LOG_ERR("Failed to get iface index for %s", iface_name);
-		return modbus_iface;
-	}
-
-	server_param.server.user_cb = &mbs_cbs;
-
-	return modbus_init_server(modbus_iface, server_param);
-}
 
 int main(void)
 {
-	LOG_INF("Starting APP");
+	LOG_INF("Starting Irrigation System Slave Node");
 
-    k_work_init_delayable(&valve_work, valve_work_handler);
+	if (settings_subsys_init() || settings_load()) {
-
+		LOG_ERR("Settings initialization or loading failed");
-	if (settings_subsys_init()) {
-		LOG_ERR("Failed to initialize settings subsystem");
 	}
 
-	if (settings_load()) {
+	valve_init();
-		LOG_ERR("Failed to load settings");
+	fwu_init();
-	}
 
-
+	if (modbus_server_init()) {
-	if (init_modbus_server()) {
 		LOG_ERR("Modbus RTU server initialization failed");
+		return 0;
 	}
-	LOG_INF("APP started");
 	
+	// Test supply voltage reading periodically
 	while (1) {
-		k_sleep(K_MSEC(1000));
+		uint16_t supply_voltage = valve_get_supply_voltage();
+		LOG_INF("Supply voltage: %u mV", supply_voltage);
+		k_msleep(5000);  // Read every 5 seconds
 	}
 	
+	LOG_INF("Irrigation System Slave Node started successfully");
 	return 0;
 }

software/apps/slave_node/src/modbus_bridge.h

@@ -1,32 +0,0 @@
-#ifndef MODBUS_BRIDGE_H
-#define MODBUS_BRIDGE_H
-
-#include <stdint.h>
-
-/**
- * @brief Reconfigures the Modbus server with new parameters.
- *
- * @param baudrate New baudrate.
- * @param unit_id New slave unit ID.
- * @return 0 on success, negative error code on failure.
- */
-int modbus_reconfigure(uint32_t baudrate, uint8_t unit_id);
-
-/**
- * @brief Gets the currently active Modbus baudrate.
- * @return The current baudrate.
- */
-uint32_t modbus_get_baudrate(void);
-
-/**
- * @brief Gets the currently active Modbus slave unit ID.
- * @return The current slave unit ID.
- */
-uint8_t modbus_get_unit_id(void);
-
-void valve_set_max_open_time(uint16_t seconds);
-void valve_set_max_close_time(uint16_t seconds);
-uint16_t valve_get_max_open_time(void);
-uint16_t valve_get_max_close_time(void);
-
-#endif // MODBUS_BRIDGE_H

software/apps/snippets/bootloader/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.20)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(bootloader LANGUAGES C)
+zephyr_include_directories(../../../include)
+add_subdirectory(../../../lib lib)
+target_sources(app PRIVATE src/main.c)

software/apps/snippets/bootloader/README.md

@@ -0,0 +1,34 @@
+# Firmware Node Application
+
+This Zephyr application provides firmware management capabilities for the irrigation system.
+
+**Tested on Zephyr 4.1.99**
+
+## Features
+
+### Step 1: Shell with Reset Command
+- Shell interface with custom "reset" command
+- Warm reboot functionality
+
+### Planned Features
+- MCUboot support with partition manager
+- Firmware version display
+- MCUmgr support for OTA updates
+
+## Building
+
+```bash
+west build -p auto -b weact_stm32g431_core apps/firmware_node -- -DBOARD_FLASH_RUNNER=blackmagicprobe
+```
+
+## Flashing
+
+```bash
+west flash
+```
+
+## Usage
+
+Connect to the device via serial console and use the shell:
+- `reset` - Reboot the system
+- `help` - Show available commands

software/apps/snippets/bootloader/VERSION

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

software/apps/snippets/bootloader/erase.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+/home/edi/zephyr-sdk-0.17.1/arm-zephyr-eabi/bin/arm-zephyr-eabi-gdb \
+	-ex 'target extended-remote /dev/ttyACM0' \
+	-ex 'monitor swdp_scan' \
+	-ex 'attach 1' \
+	-ex 'monitor erase_mass' \
+	-ex 'detach' \
+	-ex 'quit' \

software/apps/snippets/bootloader/prj.conf

@@ -0,0 +1,16 @@
+CONFIG_SHELL=y
+CONFIG_REBOOT=y
+
+# MCUboot support for recovery request function
+CONFIG_MCUBOOT_BOOTUTIL_LIB=y
+CONFIG_MCUBOOT_IMG_MANAGER=y
+CONFIG_IMG_MANAGER=y
+
+# Flash and Stream Configuration (required for IMG_MANAGER)
+CONFIG_FLASH=y
+CONFIG_STREAM_FLASH=y
+
+# Retention system
+CONFIG_RETENTION=y
+CONFIG_RETENTION_BOOT_MODE=y
+CONFIG_RETAINED_MEM=y

software/apps/snippets/bootloader/src/main.c

@@ -0,0 +1,42 @@
+#include <zephyr/kernel.h>
+#include <app_version.h>
+#include <zephyr/shell/shell.h>
+#include <zephyr/sys/reboot.h>
+#include <zephyr/dfu/mcuboot.h>
+#include <zephyr/retention/bootmode.h>
+#include <stdlib.h>
+
+/* Shell command handler for "reset" */
+static int cmd_reset(const struct shell *sh, size_t argc, char **argv)
+{
+    shell_print(sh, "Rebooting system...");
+    k_sleep(K_MSEC(100)); // Optional delay for user to see the message
+    sys_reboot(SYS_REBOOT_WARM);
+    return 0;
+}
+
+static int cmd_download(const struct shell *sh, size_t argc, char **argv)
+{
+    int rc;
+    
+    /* Set boot mode to serial recovery */
+    rc = bootmode_set(BOOT_MODE_TYPE_BOOTLOADER);
+    if (rc < 0) {
+        shell_error(sh, "Failed to set boot mode: %d", rc);
+        return rc;
+    }
+    
+    shell_print(sh, "Boot mode set to recovery. Rebooting to bootloader...");
+    k_sleep(K_MSEC(100));
+    sys_reboot(SYS_REBOOT_WARM);
+    return 0;
+}
+
+/* Register the shell command */
+SHELL_CMD_REGISTER(reset, NULL, "Reboot the system", cmd_reset);
+SHELL_CMD_REGISTER(download, NULL, "Download firmware", cmd_download);
+
+int main(void){
+    printk("Bootloader test version %s\n", APP_VERSION_EXTENDED_STRING);
+    return 0;
+}

software/apps/snippets/bootloader/sysbuild.conf

@@ -0,0 +1,5 @@
+# Sysbuild configuration for firmware_node with MCUboot
+
+# Enable MCUboot as bootloader
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_MCUBOOT_MODE_SINGLE_APP=y

software/apps/snippets/bootloader/sysbuild/bootloader.overlay

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "flash_partitions_128kb.dtsi"
+
+/ {
+	chosen {
+		zephyr,code-partition = &slot0_partition;
+	};
+};

software/apps/snippets/bootloader/sysbuild/flash_partitions_128kb.dtsi

@@ -0,0 +1,62 @@
+/*
+ * Devicetree Overlay for 128KB Flash
+ * - MCUboot Bootloader (32KB)
+ * - Application Slot (96KB)
+ */
+
+&flash0 {
+        /delete-node/ partitions;
+        partitions {
+                compatible = "fixed-partitions";
+                #address-cells = <1>;
+                #size-cells = <1>;
+
+                boot_partition: partition@0 {
+                        label = "mcuboot";
+                        reg = <0x00000000 DT_SIZE_K(32)>;
+                        read-only;
+                };
+
+                slot0_partition: partition@8000 {
+                        label = "image-0";
+                        reg = <0x00008000 DT_SIZE_K(96)>;
+                };
+        };
+};
+
+/* Add retention memory to the existing SRAM node */
+&sram0 {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        
+        retainedmem {
+                compatible = "zephyr,retained-ram";
+                status = "okay";
+                #address-cells = <1>;
+                #size-cells = <1>;
+                
+                boot_mode: retention@7f00 {
+                        compatible = "zephyr,retention";
+                        status = "okay";
+                        reg = <0x7f00 0x100>;
+                        prefix = [08 04];
+                        checksum = <1>;
+                };
+        };
+};
+
+/ {
+        chosen {
+                zephyr,boot-mode = &boot_mode;
+                zephyr,console = &cdc_acm_uart0;
+    };
+};
+
+&zephyr_udc0 {
+    status = "okay";
+    
+    cdc_acm_uart0: cdc_acm_uart0 {
+        compatible = "zephyr,cdc-acm-uart";
+        label = "CDC_ACM_0";
+    };
+};

software/apps/snippets/bootloader/sysbuild/mcuboot.conf

@@ -0,0 +1,46 @@
+#
+# MCUboot Configuration for Serial Recovery over USB-CDC
+#
+
+# Enables serial recovery mode in MCUboot.
+CONFIG_MCUBOOT_SERIAL=y
+
+# Tell MCUboot to check for a trigger to enter recovery
+CONFIG_BOOT_SERIAL_BOOT_MODE=y
+
+# --- USB Stack Configuration ---
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_DEVICE_PRODUCT="MCUboot Serial Recovery"
+
+# Use USB CDC ACM for MCUboot serial recovery (not UART)
+CONFIG_BOOT_SERIAL_CDC_ACM=y
+
+# --- Disable Zephyr Console to avoid conflicts ---
+# MCUboot's serial_adapter doesn't work well with the general console subsystem.
+CONFIG_UART_CONSOLE=n
+CONFIG_CONSOLE_HANDLER=n
+CONFIG_CONSOLE=n
+
+# --- Flash and Stream Configuration (required for IMG_MANAGER) ---
+CONFIG_FLASH=y
+CONFIG_STREAM_FLASH=y
+
+# --- mcumgr Configuration ---
+# MCUMGR requires NET_BUF, even for serial transport.
+CONFIG_NET_BUF=y
+CONFIG_NET_LOG=n
+
+# Enables the mcumgr library and necessary command handlers
+CONFIG_MCUMGR=y
+CONFIG_IMG_MANAGER=y
+CONFIG_MCUMGR_GRP_IMG=y
+CONFIG_MCUMGR_GRP_OS=y
+
+# --- Retention Configuration ---
+CONFIG_RETAINED_MEM=y
+CONFIG_RETENTION=y
+CONFIG_RETENTION_BOOT_MODE=y
+
+# --- Optional: Reduce memory usage ---
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=1024

software/apps/snippets/bootloader/sysbuild/mcuboot.overlay

@@ -0,0 +1,17 @@
+#include "flash_partitions_128kb.dtsi"
+
+/ {
+    chosen {
+        zephyr,code-partition = &boot_partition;
+        zephyr,console = &cdc_acm_uart0;
+    };
+};
+
+&zephyr_udc0 {
+    status = "okay";
+    
+    cdc_acm_uart0: cdc_acm_uart0 {
+        compatible = "zephyr,cdc-acm-uart";
+        label = "CDC_ACM_0";
+    };
+};

software/include/lib/fwu.h

@@ -0,0 +1,10 @@
+#ifndef FWU_H
+#define FWU_H
+
+#include <stdint.h>
+
+void fwu_init(void);
+void fwu_handler(uint16_t addr, uint16_t reg);
+uint16_t fwu_get_last_chunk_crc(void);
+
+#endif // FWU_H

software/include/lib/modbus_server.h

@@ -0,0 +1,54 @@
+#ifndef MODBUS_SERVER_H
+#define MODBUS_SERVER_H
+
+#include <stdint.h>
+
+/**
+ * @brief Modbus Input Register Addresses.
+ */
+enum
+{
+	/* Valve Control & Status */
+	REG_INPUT_VALVE_STATE_MOVEMENT = 0x0000,
+	REG_INPUT_MOTOR_CURRENT_MA = 0x0001,
+	/* Digital Inputs */
+	REG_INPUT_DIGITAL_INPUTS_STATE = 0x0020,
+	REG_INPUT_BUTTON_EVENTS = 0x0021,
+	/* System Config & Status */
+	REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR = 0x00F0,
+	REG_INPUT_FIRMWARE_VERSION_PATCH = 0x00F1,
+	REG_INPUT_DEVICE_STATUS = 0x00F2,
+	REG_INPUT_UPTIME_SECONDS_LOW = 0x00F3,
+	REG_INPUT_UPTIME_SECONDS_HIGH = 0x00F4,
+	REG_INPUT_SUPPLY_VOLTAGE_MV = 0x00F5,
+	REG_INPUT_FWU_LAST_CHUNK_CRC = 0x0100
+};
+
+/**
+ * @brief Modbus Holding Register Addresses.
+ */
+enum
+{
+	/* Valve Control */
+	REG_HOLDING_VALVE_COMMAND = 0x0000,
+	REG_HOLDING_MAX_OPENING_TIME_S = 0x0001,
+	REG_HOLDING_MAX_CLOSING_TIME_S = 0x0002,
+	/* Digital Outputs */
+	REG_HOLDING_DIGITAL_OUTPUTS_STATE = 0x0010,
+	/* System Config */
+	REG_HOLDING_WATCHDOG_TIMEOUT_S = 0x00F0,
+	REG_HOLDING_DEVICE_RESET = 0x00F1,
+	/* Firmware Update */
+	REG_HOLDING_FWU_COMMAND = 0x0100,
+	REG_HOLDING_FWU_CHUNK_OFFSET_LOW = 0x0101,
+	REG_HOLDING_FWU_CHUNK_OFFSET_HIGH = 0x0102,
+	REG_HOLDING_FWU_CHUNK_SIZE = 0x0103,
+	REG_HOLDING_FWU_DATA_BUFFER = 0x0180,
+};
+
+int modbus_server_init(void);
+int modbus_reconfigure(uint32_t baudrate, uint8_t unit_id);
+uint32_t modbus_get_baudrate(void);
+uint8_t modbus_get_unit_id(void);
+
+#endif // MODBUS_SERVER_H

software/include/lib/valve.h

@@ -0,0 +1,37 @@
+#ifndef VALVE_H
+#define VALVE_H
+
+#include <stdint.h>
+#include <zephyr/drivers/gpio.h>
+
+struct valve_gpios {
+    const struct gpio_dt_spec in0;
+    const struct gpio_dt_spec in1;
+    const struct gpio_dt_spec rst;
+    const struct gpio_dt_spec sen;
+    const struct gpio_dt_spec s0;
+    const struct gpio_dt_spec s1;
+};
+
+enum valve_state {
+    VALVE_STATE_CLOSED,
+    VALVE_STATE_OPEN,
+};
+enum valve_movement { VALVE_MOVEMENT_IDLE, VALVE_MOVEMENT_OPENING, VALVE_MOVEMENT_CLOSING, VALVE_MOVEMENT_ERROR };
+
+void valve_init(void);
+void valve_open(void);
+void valve_close(void);
+void valve_stop(void);
+
+enum valve_state valve_get_state(void);
+enum valve_movement valve_get_movement(void);
+uint16_t valve_get_motor_current(void);
+uint16_t valve_get_supply_voltage(void);
+
+void valve_set_max_open_time(uint16_t seconds);
+void valve_set_max_close_time(uint16_t seconds);
+uint16_t valve_get_max_open_time(void);
+uint16_t valve_get_max_close_time(void);
+
+#endif // VALVE_H

software/lib/CMakeLists.txt

@@ -1,4 +1,5 @@
-# Add your shared libraries here
+add_subdirectory_ifdef(CONFIG_LIB_FWU fwu)
-# Example:
+add_subdirectory_ifdef(CONFIG_LIB_MODBUS_SERVER modbus_server)
-# add_library(modbus modbus/modbus.c)
+add_subdirectory_ifdef(CONFIG_LIB_VALVE valve)
-# target_include_directories(modbus PUBLIC .)
+add_subdirectory_ifdef(CONFIG_SHELL_SYSTEM shell_system)
+add_subdirectory_ifdef(CONFIG_SHELL_MODBUS shell_modbus)

software/lib/Kconfig

@@ -0,0 +1,8 @@
+menu "Irrigation system software libraries"
+
+rsource "fwu/Kconfig"
+rsource "modbus_server/Kconfig"
+rsource "valve/Kconfig"
+rsource "shell_system/Kconfig"
+rsource "shell_modbus/Kconfig"
+endmenu

software/lib/fwu/CMakeLists.txt

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

software/lib/fwu/Kconfig

@@ -0,0 +1,5 @@
+config LIB_FWU
+    bool "Enable Firmware Update Library"
+    default y
+    help
+      Enable the Firmware Update Library.

software/lib/fwu/fwu.c

@@ -0,0 +1,45 @@
+#include <zephyr/kernel.h>
+#include <zephyr/sys/crc.h>
+#include <zephyr/sys/byteorder.h>
+#include <zephyr/logging/log.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];
+static uint32_t fwu_chunk_offset = 0;
+static uint16_t fwu_chunk_size = 0;
+static uint16_t fwu_last_chunk_crc = 0;
+
+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 y
+    help
+      Enable the Modbus Server Library.

software/lib/modbus_server/modbus_server.c

@@ -0,0 +1,233 @@
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/uart.h>
+#include <zephyr/device.h>
+#include <zephyr/modbus/modbus.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/sys/reboot.h>
+#include <lib/modbus_server.h>
+#include <lib/valve.h>
+#include <lib/fwu.h>
+
+#include <zephyr/usb/usb_device.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;
+
+static void watchdog_timer_handler(struct k_timer *timer_id)
+{
+	LOG_WRN("Modbus watchdog expired! Closing valve as a fail-safe.");
+	valve_close();
+}
+
+static inline void reset_watchdog(void)
+{
+	if (watchdog_timeout_s > 0)
+	{
+		k_timer_start(&watchdog_timer, K_SECONDS(watchdog_timeout_s), K_NO_WAIT);
+	}
+}
+
+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;
+	default:
+		*reg = 0;
+		break;
+	}
+	return 0;
+}
+
+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_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;
+}
+
+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_CURRENT_MA:
+		*reg = valve_get_motor_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 = 12300;
+		break;
+	case REG_INPUT_FWU_LAST_CHUNK_CRC:
+		*reg = fwu_get_last_chunk_crc();
+		break;
+	case REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR:
+		*reg = (0 << 8) | 0;
+		break;
+	case REG_INPUT_FIRMWARE_VERSION_PATCH:
+		*reg = 2;
+		break;
+	default:
+		*reg = 0;
+		break;
+	}
+	return 0;
+}
+
+static struct modbus_user_callbacks mbs_cbs = {
+	.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 +1,5 @@
+config SHELL_MODBUS
+    bool "Enable Shell Modbus"
+    default y
+    help
+      Enable the modnbus shell commands.

software/lib/shell_modbus/shell_modbus.c

@@ -1,6 +1,7 @@
 #include <zephyr/shell/shell.h>
 #include <stdlib.h>
-#include "modbus_bridge.h"
+#include <lib/modbus_server.h>
+#include <lib/valve.h>
 
 static int cmd_modbus_set_baud(const struct shell *sh, size_t argc, char **argv)
 {

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 y
+    help
+      Enable the system commands.

software/lib/valve/CMakeLists.txt

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

software/lib/valve/Kconfig

@@ -0,0 +1,5 @@
+config LIB_VALVE
+    bool "Enable Valve Library"
+    default y
+    help
+      Enable the Valve Library.

software/lib/valve/valve.c

@@ -0,0 +1,216 @@
+#include <zephyr/kernel.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/device.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/drivers/adc.h>
+#include <lib/valve.h>
+
+LOG_MODULE_REGISTER(valve, LOG_LEVEL_DBG);
+
+// ADC configuration for MULTISENSE (PA0)
+static const struct device *adc_dev = DEVICE_DT_GET(DT_NODELABEL(adc1));
+static const struct adc_channel_cfg adc_channel_cfg = {
+    .gain = ADC_GAIN_1,
+    .reference = ADC_REF_INTERNAL,  // STM32 only supports internal ref (1.2V)
+    .acquisition_time = ADC_ACQ_TIME_DEFAULT,  // Use default acquisition time
+    .channel_id = 1, // ADC1_IN1 (PA0)
+    .differential = 0,
+};
+
+static const struct valve_gpios valve_gpios = {
+    .in0 = GPIO_DT_SPEC_GET(DT_NODELABEL(vnd7050aj), in0_gpios),
+    .in1 = GPIO_DT_SPEC_GET(DT_NODELABEL(vnd7050aj), in1_gpios),
+    .rst = GPIO_DT_SPEC_GET(DT_NODELABEL(vnd7050aj), rst_gpios),
+    .sen = GPIO_DT_SPEC_GET(DT_NODELABEL(vnd7050aj), sen_gpios),
+    .s0 = GPIO_DT_SPEC_GET(DT_NODELABEL(vnd7050aj), s0_gpios),
+    .s1 = GPIO_DT_SPEC_GET(DT_NODELABEL(vnd7050aj), s1_gpios),
+};
+
+static enum valve_state current_state = VALVE_STATE_CLOSED;
+static enum valve_movement current_movement = VALVE_MOVEMENT_IDLE;
+static uint16_t max_opening_time_s = 60;
+static uint16_t max_closing_time_s = 60;
+static struct k_work_delayable valve_work;
+
+static void valve_work_handler(struct k_work *work)
+{
+    gpio_pin_set_dt(&valve_gpios.in0, 0);
+    gpio_pin_set_dt(&valve_gpios.in1, 0);
+    gpio_pin_set_dt(&valve_gpios.rst, 0);
+
+    if (current_movement == VALVE_MOVEMENT_OPENING) {
+        LOG_INF("Valve finished opening");
+    } else if (current_movement == VALVE_MOVEMENT_CLOSING) {
+        current_state = VALVE_STATE_CLOSED;
+        LOG_INF("Valve finished closing");
+    }
+    current_movement = VALVE_MOVEMENT_IDLE;
+}
+
+void valve_init(void)
+{
+    k_work_init_delayable(&valve_work, valve_work_handler);
+    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));
+
+    // Initialize ADC for MULTISENSE
+    if (!device_is_ready(adc_dev)) {
+        LOG_ERR("ADC device not ready");
+        return;
+    }
+
+    int ret = adc_channel_setup(adc_dev, &adc_channel_cfg);
+    if (ret < 0) {
+        LOG_ERR("Could not setup ADC channel (%d)", ret);
+        return;
+    }
+
+    gpio_pin_configure_dt(&valve_gpios.in0, GPIO_OUTPUT_INACTIVE); // IN0 control pin - output, deactivate
+    gpio_pin_configure_dt(&valve_gpios.in1, GPIO_OUTPUT_INACTIVE); // IN1 control pin - output, deactivate
+    gpio_pin_configure_dt(&valve_gpios.rst, GPIO_OUTPUT_INACTIVE);  // Keep VND7050AJ in reset
+    gpio_pin_configure_dt(&valve_gpios.sen, GPIO_OUTPUT_INACTIVE);  // Sensor enable pin - output, inactive
+    // S0 and S1 pins are used for selecting the valve state, they are initially inactive
+    // and will be set to active when the valve is opened or closed.
+    gpio_pin_configure_dt(&valve_gpios.s0, GPIO_OUTPUT_INACTIVE);  // S0 select pin - output
+    gpio_pin_configure_dt(&valve_gpios.s1, GPIO_OUTPUT_INACTIVE);  // S1 select pin - output
+    
+    LOG_INF("Valve initialized: max_open=%us, max_close=%us", max_opening_time_s, max_closing_time_s);
+}
+
+void valve_open(void)
+{
+    if (current_state == VALVE_STATE_CLOSED) {
+        gpio_pin_set_dt(&valve_gpios.rst, 1);
+        gpio_pin_set_dt(&valve_gpios.in1, 0);
+        gpio_pin_set_dt(&valve_gpios.in0, 1);
+        current_state = VALVE_STATE_OPEN;
+        current_movement = VALVE_MOVEMENT_OPENING;
+        k_work_schedule(&valve_work, K_MSEC(max_opening_time_s * 1000 * 0.9));
+    }
+}
+
+void valve_close(void)
+{
+    if (current_state == VALVE_STATE_OPEN) {
+        gpio_pin_set_dt(&valve_gpios.rst, 1);
+        gpio_pin_set_dt(&valve_gpios.in0, 0);
+        gpio_pin_set_dt(&valve_gpios.in1, 1);
+        current_movement = VALVE_MOVEMENT_CLOSING;
+        k_work_schedule(&valve_work, K_MSEC(max_closing_time_s * 1000 * 0.9));
+    }
+}
+
+void valve_stop(void)
+{
+    k_work_cancel_delayable(&valve_work);
+    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; }
+uint16_t valve_get_motor_current(void) { return (current_movement != VALVE_MOVEMENT_IDLE) ? 150 : 10; }
+
+uint16_t valve_get_supply_voltage(void)
+{
+    LOG_INF("=== ADC TEST MODE - PA0 LAB SUPPLY TEST ===");
+    LOG_INF("Connect lab supply to PA0. Recommended: 1.0V");
+    LOG_INF("Expected raw value for 1.0V: ~2007 (using 2.048V VREFBUF)");
+    LOG_INF("ADC range: 0-2.048V (STM32G431 VREFBUF internal reference)");
+    LOG_INF("");
+    
+    // No VND7050AJ configuration - pure ADC test
+    // Just make sure pins are in safe state
+    gpio_pin_configure_dt(&valve_gpios.rst, GPIO_OUTPUT);
+    gpio_pin_configure_dt(&valve_gpios.sen, GPIO_OUTPUT); 
+    gpio_pin_configure_dt(&valve_gpios.s0, GPIO_OUTPUT);
+    gpio_pin_configure_dt(&valve_gpios.s1, GPIO_OUTPUT);
+    gpio_pin_configure_dt(&valve_gpios.in0, GPIO_OUTPUT);
+    gpio_pin_configure_dt(&valve_gpios.in1, GPIO_OUTPUT);
+    
+    // Set all VND7050AJ pins LOW for safety
+    gpio_pin_set_dt(&valve_gpios.rst, 0);
+    gpio_pin_set_dt(&valve_gpios.s0, 0);
+    gpio_pin_set_dt(&valve_gpios.s1, 0);
+    gpio_pin_set_dt(&valve_gpios.sen, 0);
+    gpio_pin_set_dt(&valve_gpios.in0, 0);
+    gpio_pin_set_dt(&valve_gpios.in1, 0);
+    
+    LOG_INF("VND7050AJ disabled - all pins LOW");
+    LOG_INF("PA0 is now isolated for lab supply testing");
+    k_msleep(100);
+    
+    // Setup simple ADC sequence
+    int16_t buf;
+    struct adc_sequence sequence = {
+        .buffer = &buf,
+        .buffer_size = sizeof(buf),
+        .channels = BIT(adc_channel_cfg.channel_id),
+        .resolution = 12,
+    };
+    
+    LOG_INF("Starting continuous ADC readings every 500ms...");
+    
+    // Continuous monitoring loop with improved stability
+    int reading_count = 0;
+    int32_t samples[10];  // Buffer for averaging
+    
+    while (1) {
+        // Take multiple samples and average them for stability
+        int valid_samples = 0;
+        int32_t sum = 0;
+        
+        for (int i = 0; i < 10; i++) {
+            k_msleep(50);  // Longer delay between samples for stability
+            int adc_ret = adc_read(adc_dev, &sequence);
+            
+            if (adc_ret == 0 && buf > 100) {  // Filter out near-zero readings (floating input)
+                samples[i] = buf;
+                sum += buf;
+                valid_samples++;
+            } else {
+                LOG_WRN("Sample %d invalid: raw=%d, ret=%d", i, buf, adc_ret);
+                samples[i] = 0;  // Mark as invalid
+            }
+        }
+        
+        if (valid_samples > 0) {
+            // Calculate average
+            int32_t avg_raw = sum / valid_samples;
+            
+            // Calculate voltage using the correct VREFBUF reference (2.048V)
+            int32_t pa0_mv = (avg_raw * 2048) / 4096;  // Using 2.048V VREFBUF
+            
+            // Calculate standard deviation to show stability
+            int32_t variance = 0;
+            for (int i = 0; i < valid_samples; i++) {
+                int32_t diff = samples[i] - avg_raw;
+                variance += diff * diff;
+            }
+            int32_t std_dev = (valid_samples > 1) ? variance / (valid_samples - 1) : 0;
+            
+            // Find min/max for this sample set
+            int32_t min_raw = samples[0], max_raw = samples[0];
+            for (int i = 1; i < valid_samples; i++) {
+                if (samples[i] < min_raw) min_raw = samples[i];
+                if (samples[i] > max_raw) max_raw = samples[i];
+            }
+            
+            LOG_INF("Reading %d: avg_raw=%d (%dmV) | range=%d-%d | std_dev=%d | samples=%d/10", 
+                    reading_count, (int)avg_raw, (int)pa0_mv,
+                    (int)min_raw, (int)max_raw, (int)std_dev, valid_samples);
+        } else {
+            LOG_ERR("Reading %d: All ADC samples failed", reading_count);
+        }
+        
+        reading_count++;
+        k_msleep(400);  // Wait before next reading set
+    }
+    
+    return 0;  // Never reached
+}
+
+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)); }
+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; }

software/serial_monitor.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+import serial
+import time
+import sys
+import argparse
+
+def monitor_serial(port):
+    try:
+        # Open serial connection
+        ser = serial.Serial(port, 115200, timeout=1)
+        print(f"Connected to {port}")
+        
+        # Send reset command
+        ser.write(b'reset\n')
+        print("Sent reset command")
+        
+        # Wait a bit and then read output
+        time.sleep(0.5)
+        
+        # Read output for 10 seconds
+        start_time = time.time()
+        while 1: #time.time() - start_time < 10:
+            if ser.in_waiting > 0:
+                data = ser.read(ser.in_waiting)
+                try:
+                    text = data.decode('utf-8', errors='ignore')
+                    print(text, end='')
+                except:
+                    print(f"Raw bytes: {data}")
+            time.sleep(0.1)
+        
+        ser.close()
+        print("\nSerial monitor closed")
+        
+    except Exception as e:
+        print(f"Error: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='Serial monitor.')
+    parser.add_argument('-p', '--port', help='Serial port to connect to', required=True)
+    args = parser.parse_args()
+    monitor_serial(args.port)

software/serial_reset_monitor.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+import serial
+import time
+import sys
+
+def monitor_serial_with_reset():
+    try:
+        # Open serial port
+        ser = serial.Serial('/dev/ttyACM1', 115200, timeout=1)
+        print("Serial port opened successfully")
+        
+        # Clear any existing data
+        ser.flushInput()
+        ser.flushOutput()
+        
+        # Send reset command
+        print("Sending reset command...")
+        ser.write(b"reset\n")
+        time.sleep(0.1)
+        
+        # Read output for 10 seconds
+        print("Reading serial output...")
+        start_time = time.time()
+        output_lines = []
+        
+        while time.time() - start_time < 10:
+            if ser.in_waiting > 0:
+                try:
+                    line = ser.readline().decode('utf-8', errors='replace').strip()
+                    if line:
+                        print(f"[{time.time() - start_time:.3f}s] {line}")
+                        output_lines.append(line)
+                except Exception as e:
+                    print(f"Error reading line: {e}")
+            time.sleep(0.01)
+        
+        ser.close()
+        print("\nSerial monitoring complete")
+        
+        # Summary
+        print("\n=== SUMMARY ===")
+        supply_voltage_lines = [line for line in output_lines if "Supply voltage" in line]
+        if supply_voltage_lines:
+            print("Supply voltage readings:")
+            for line in supply_voltage_lines:
+                print(f"  {line}")
+        else:
+            print("No supply voltage readings found")
+            
+    except Exception as e:
+        print(f"Error: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    monitor_serial_with_reset()

software/tools/modbus_tool/README.de.md

@@ -1,3 +1,5 @@
+<img src="../../../docs/img/logo.png" alt="Logo" width="100"/>
+
 # Modbus Tool für Bewässerungssystem-Knoten
 
 Dieses Python-Skript bietet eine interaktive Kommandozeilen-Benutzeroberfläche (TUI) zur Steuerung und Überwachung eines Ventil-Knotens des Bewässerungssystems über Modbus RTU.
@@ -5,10 +7,15 @@ Dieses Python-Skript bietet eine interaktive Kommandozeilen-Benutzeroberfläche
 ## Features
 
 - **Interaktive Benutzeroberfläche:** Eine benutzerfreundliche, auf `curses` basierende Oberfläche, die eine einfache Bedienung ermöglicht.
-- **Live-Statusanzeige:** Zeigt tabellarisch und in Echtzeit den Zustand des Ventils, die Bewegung, den Motorstrom, die konfigurierten Öffnungs-/Schließzeiten sowie Firmware-Version und Uptime des Geräts an.
+- **Live-Statusanzeige:** Zeigt tabellarisch und in Echtzeit alle wichtigen Register des Slaves an:
-- **Volle Kontrolle:** Ermöglicht das Senden von Befehlen zum Öffnen, Schließen und Stoppen des Ventils.
+    - Ventilstatus (Zustand, Bewegung, Motorstrom)
-- **Konfiguration zur Laufzeit:** Die maximalen Öffnungs- und Schließzeiten können direkt in der Oberfläche geändert werden.
+    - Zustand der digitalen Ein- und Ausgänge
-- **Anpassbares Design:** Die Benutzeroberfläche ist für eine klare Lesbarkeit mit einem durchgehenden blauen Hintergrund und abgesetzten Schaltflächen gestaltet.
+    - "Clear-on-Read" Taster-Events
+    - Systemkonfiguration (Öffnungs-/Schließzeiten, Watchdog-Timeout)
+    - Gerätestatus (Firmware-Version, Uptime)
+- **Volle Kontrolle:** Ermöglicht das Senden von Befehlen zum Öffnen, Schließen und Stoppen des Ventils sowie zum Umschalten der digitalen Ausgänge.
+- **Konfiguration zur Laufzeit:** Die maximalen Öffnungs-/Schließzeiten und der Watchdog-Timeout können direkt in der Oberfläche geändert werden.
+- **Simulierter Firmware-Upload:** Implementiert den vollständigen, in der Dokumentation beschriebenen Firmware-Update-Prozess. Das Tool sendet eine `firmware.bin`-Datei in Chunks an den Slave und folgt dem CRC-Verifizierungs-Protokoll.
 
 ## Installation
 
@@ -91,5 +98,6 @@ Ersetzen Sie `/dev/ttyACM0` durch den korrekten Port Ihres Geräts.
 
 - **Navigation:** Verwenden Sie die **Pfeiltasten (↑/↓)**, um zwischen den Menüpunkten zu navigieren.
 - **Auswählen:** Drücken Sie **Enter**, um den ausgewählten Befehl auszuführen.
-- **Werte eingeben:** Bei Aktionen wie "Set Max Opening Time" werden Sie zur Eingabe eines Wertes aufgefordert. Geben Sie den Wert ein und bestätigen Sie mit **Enter**.
+- **Werte eingeben:** Bei Aktionen wie "Set Watchdog" werden Sie zur Eingabe eines Wertes aufgefordert. Geben Sie den Wert ein und bestätigen Sie mit **Enter**.
+- **Firmware Update:** Diese Funktion startet den Upload der Datei `firmware.bin` aus dem aktuellen Verzeichnis. Während des Updates wird eine Fortschrittsanzeige dargestellt.
 - **Beenden:** Wählen Sie den Menüpunkt **"Exit"** und drücken Sie **Enter**.

software/tools/modbus_tool/modbus_tool.py

@@ -4,251 +4,331 @@ import threading
 import time
 import sys
 import curses
+import os
 from pymodbus.client import ModbusSerialClient
 from pymodbus.exceptions import ModbusException
 
-# Register Definitions
+# --- Register Definitions ---
+# (omitted for brevity, no changes here)
 REG_INPUT_VALVE_STATE_MOVEMENT = 0x0000
 REG_INPUT_MOTOR_CURRENT_MA = 0x0001
+REG_INPUT_DIGITAL_INPUTS_STATE = 0x0020
+REG_INPUT_BUTTON_EVENTS = 0x0021
 REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR = 0x00F0
 REG_INPUT_FIRMWARE_VERSION_PATCH = 0x00F1
+REG_INPUT_DEVICE_STATUS = 0x00F2
 REG_INPUT_UPTIME_SECONDS_LOW = 0x00F3
 REG_INPUT_UPTIME_SECONDS_HIGH = 0x00F4
+REG_INPUT_SUPPLY_VOLTAGE_MV = 0x00F5
+REG_INPUT_FWU_LAST_CHUNK_CRC = 0x0100
 REG_HOLDING_VALVE_COMMAND = 0x0000
 REG_HOLDING_MAX_OPENING_TIME_S = 0x0001
 REG_HOLDING_MAX_CLOSING_TIME_S = 0x0002
+REG_HOLDING_DIGITAL_OUTPUTS_STATE = 0x0010
+REG_HOLDING_WATCHDOG_TIMEOUT_S = 0x00F0
+REG_HOLDING_DEVICE_RESET = 0x00F1
+REG_HOLDING_FWU_COMMAND = 0x0100
+REG_HOLDING_FWU_CHUNK_OFFSET_LOW = 0x0101
+REG_HOLDING_FWU_CHUNK_OFFSET_HIGH = 0x0102
+REG_HOLDING_FWU_CHUNK_SIZE = 0x0103
+REG_HOLDING_FWU_DATA_BUFFER = 0x0180
 
-# Global state
+
+# --- Global State ---
 stop_event = threading.Event()
 client = None
 status_data = {}
 status_lock = threading.Lock()
+update_status = {"running": False, "message": "", "progress": 0.0}
+update_lock = threading.Lock()
 
 def format_uptime(seconds):
-    """Formats seconds into a human-readable d/h/m/s string."""
+    if not isinstance(seconds, (int, float)) or seconds < 0: return "N/A"
-    if not isinstance(seconds, (int, float)) or seconds < 0:
+    if seconds == 0: return "0s"
-        return "N/A"
+    days, rem = divmod(seconds, 86400); hours, rem = divmod(rem, 3600); minutes, secs = divmod(rem, 60)
-    if seconds == 0:
-        return "0s"
-
-    days, remainder = divmod(seconds, 86400)
-    hours, remainder = divmod(remainder, 3600)
-    minutes, secs = divmod(remainder, 60)
-
     parts = []
-    if days > 0:
+    if days > 0: parts.append(f"{int(days)}d")
-        parts.append(f"{int(days)}d")
+    if hours > 0: parts.append(f"{int(hours)}h")
-    if hours > 0:
+    if minutes > 0: parts.append(f"{int(minutes)}m")
-        parts.append(f"{int(hours)}h")
+    if secs > 0 or not parts: parts.append(f"{int(secs)}s")
-    if minutes > 0:
-        parts.append(f"{int(minutes)}m")
-    # Always show seconds if it's the only unit or if other units are present
-    if secs > 0 or not parts:
-        parts.append(f"{int(secs)}s")
-
     return " ".join(parts)
 
 def poll_status(slave_id, interval):
-    """Periodically polls the status of the node and updates the global status_data dict."""
     global status_data
+    reconnect_attempts = 0
+    max_reconnect_attempts = 5
+    reconnect_delay = 1 # seconds
+
     while not stop_event.is_set():
-        new_data = {"error": None}
+        if update_status["running"]:
+            time.sleep(interval)
+            continue
+
+        new_data = {}
         try:
-            # Read all registers in a few calls
+            if not client.is_socket_open():
-            rr = client.read_input_registers(REG_INPUT_VALVE_STATE_MOVEMENT, count=2, slave=slave_id)
+                reconnect_attempts += 1
-            hr = client.read_holding_registers(REG_HOLDING_MAX_OPENING_TIME_S, count=2, slave=slave_id)
+                if reconnect_attempts >= max_reconnect_attempts:
-            rr_sys = client.read_input_registers(REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR, count=5, slave=slave_id)
+                    new_data["error"] = f"Failed to reconnect after {max_reconnect_attempts} attempts. Exiting."
+                    stop_event.set()
+                    break
                 
-            if rr.isError(): raise ModbusException(f"reading valve status: {rr}")
+                # Attempt to connect
-            if hr.isError(): raise ModbusException(f"reading holding registers: {hr}")
+                if client.connect():
-            if rr_sys.isError(): raise ModbusException(f"reading system status: {rr_sys}")
+                    reconnect_attempts = 0
+                    new_data["error"] = None # Clear error on successful reconnect
+                else:
+                    new_data["error"] = f"Connection lost. Attempting to reconnect ({reconnect_attempts}/{max_reconnect_attempts})..."
+                    time.sleep(reconnect_delay)
+                    continue
 
-            valve_state_raw = rr.registers[0]
+            # If connected, try to read data
+            ir_valve = client.read_input_registers(REG_INPUT_VALVE_STATE_MOVEMENT, count=2, slave=slave_id)
+            ir_dig = client.read_input_registers(REG_INPUT_DIGITAL_INPUTS_STATE, count=2, slave=slave_id)
+            ir_sys = client.read_input_registers(REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR, count=6, slave=slave_id)
+            hr_valve = client.read_holding_registers(REG_HOLDING_MAX_OPENING_TIME_S, count=2, slave=slave_id)
+            hr_dig = client.read_holding_registers(REG_HOLDING_DIGITAL_OUTPUTS_STATE, count=1, slave=slave_id)
+            hr_sys = client.read_holding_registers(REG_HOLDING_WATCHDOG_TIMEOUT_S, count=1, slave=slave_id)
+
+            for res in [ir_valve, ir_dig, ir_sys, hr_valve, hr_dig, hr_sys]:
+                if res.isError():
+                    raise ModbusException(str(res))
+            
+            valve_state_raw = ir_valve.registers[0]
             movement_map = {0: "Idle", 1: "Opening", 2: "Closing", 3: "Error"}
             state_map = {0: "Closed", 1: "Open"}
             new_data["movement"] = movement_map.get(valve_state_raw >> 8, 'Unknown')
             new_data["state"] = state_map.get(valve_state_raw & 0xFF, 'Unknown')
-            new_data["motor_current"] = f"{rr.registers[1]} mA"
+            new_data["motor_current"] = f"{ir_valve.registers[1]} mA"
-            new_data["open_time"] = f"{hr.registers[0]}s"
+            new_data["open_time"] = f"{hr_valve.registers[0]}s"
-            new_data["close_time"] = f"{hr.registers[1]}s"
+            new_data["close_time"] = f"{hr_valve.registers[1]}s"
+            new_data["digital_inputs"] = f"0x{ir_dig.registers[0]:04X}"
+            new_data["button_events"] = f"0x{ir_dig.registers[1]:04X}"
+            new_data["digital_outputs"] = f"0x{hr_dig.registers[0]:04X}"
             
-            fw_major = rr_sys.registers[0] >> 8
+            fw_major = ir_sys.registers[0] >> 8
-            fw_minor = rr_sys.registers[0] & 0xFF
+            fw_minor = ir_sys.registers[0] & 0xFF
-            fw_patch = rr_sys.registers[1]
+            fw_patch = ir_sys.registers[1]
-            uptime_low = rr_sys.registers[3]
+            uptime_seconds = (ir_sys.registers[4] << 16) | ir_sys.registers[3]
-            uptime_high = rr_sys.registers[4]
+            supply_voltage_mv = ir_sys.registers[5]
-            uptime_seconds = (uptime_high << 16) | uptime_low
             new_data["firmware"] = f"v{fw_major}.{fw_minor}.{fw_patch}"
+            new_data["device_status"] = "OK" if ir_sys.registers[2] == 0 else "ERROR"
             new_data["uptime"] = format_uptime(uptime_seconds)
-
+            new_data["supply_voltage"] = f"{supply_voltage_mv / 1000.0:.2f} V"
-        except ModbusException as e:
+            new_data["watchdog"] = f"{hr_sys.registers[0]}s"
-            new_data["error"] = f"Modbus Error: {e}"
+            new_data["error"] = None # Clear any previous error on successful read
+            reconnect_attempts = 0 # Reset attempts on successful communication
         except Exception as e:
-            new_data["error"] = f"Unexpected Error: {e}"
+            new_data["error"] = f"Communication Error: {e}. Closing connection."
+            client.close() # Close connection to force reconnect attempt in next loop
+        finally:
+            with status_lock:
+                status_data = new_data
+            time.sleep(interval)
 
-        with status_lock:
+def firmware_update_thread(slave_id, filepath):
-            status_data = new_data
+    global update_status
-        time.sleep(interval)
+    with update_lock:
+        update_status = {"running": True, "message": "Starting update...", "progress": 0.0}
+    try:
+        with open(filepath, 'rb') as f: firmware = f.read()
+        file_size = len(firmware)
+        chunk_size = 248
+        offset = 0
+        while offset < file_size:
+            chunk = firmware[offset:offset + chunk_size]
+            with update_lock:
+                update_status["message"] = f"Sending chunk {offset//chunk_size + 1}/{(file_size + chunk_size - 1)//chunk_size}..."
+                update_status["progress"] = offset / file_size
+            client.write_register(REG_HOLDING_FWU_CHUNK_OFFSET_LOW, offset & 0xFFFF, slave=slave_id)
+            client.write_register(REG_HOLDING_FWU_CHUNK_OFFSET_HIGH, (offset >> 16) & 0xFFFF, slave=slave_id)
+            client.write_register(REG_HOLDING_FWU_CHUNK_SIZE, len(chunk), slave=slave_id)
+            padded_chunk = chunk + (b'\x00' if len(chunk) % 2 != 0 else b'')
+            registers = [int.from_bytes(padded_chunk[i:i+2], 'big') for i in range(0, len(padded_chunk), 2)]
+            burst_size_regs = 16
+            for i in range(0, len(registers), burst_size_regs):
+                reg_burst = registers[i:i + burst_size_regs]
+                start_addr = REG_HOLDING_FWU_DATA_BUFFER + i
+                client.write_registers(start_addr, reg_burst, slave=slave_id)
+                time.sleep(0.02)
+            time.sleep(0.1)
+            client.read_input_registers(REG_INPUT_FWU_LAST_CHUNK_CRC, count=1, slave=slave_id)
+            client.write_register(REG_HOLDING_FWU_COMMAND, 1, slave=slave_id)
+            offset += len(chunk)
+        with update_lock:
+            update_status["progress"] = 1.0
+            update_status["message"] = "Finalizing update..."
+        client.write_register(REG_HOLDING_FWU_COMMAND, 2, slave=slave_id)
+        time.sleep(1)
+        with update_lock: update_status["message"] = "Update complete! Slave is rebooting."
+        time.sleep(2)
+    except Exception as e:
+        with update_lock: update_status["message"] = f"Error: {e}"
+        time.sleep(3)
+    finally:
+        with update_lock: update_status["running"] = False
 
 def draw_button(stdscr, y, x, text, selected=False):
-    """Draws a button with a border, handling selection highlight."""
+    """Draws a button, handling selection highlight."""
-    button_width = len(text) + 4
     color = curses.color_pair(2) if selected else curses.color_pair(1)
-
+    button_width = len(text) + 2
     stdscr.addstr(y, x, " " * button_width, color)
-    stdscr.addstr(y, x + 2, text, color)
+    stdscr.addstr(y, x + 1, text, color)
-    stdscr.addstr(y - 1, x, "┌" + "─" * (button_width - 2) + "┐", color)
+
-    stdscr.addstr(y, x, "│", color)
+def file_browser(stdscr):
-    stdscr.addstr(y, x + button_width - 1, "│", color)
+    """A simple curses file browser."""
-    stdscr.addstr(y + 1, x, "└" + "─" * (button_width - 2) + "┘", color)
+    curses.curs_set(1)
+    path = os.getcwd()
+    selected_index = 0
+    
+    while True:
+        stdscr.clear()
+        h, w = stdscr.getmaxyx()
+        stdscr.addstr(0, 0, f"Select Firmware File: {path}".ljust(w-1), curses.color_pair(2))
+        
+        try:
+            items = sorted(os.listdir(path))
+        except OSError as e:
+            items = [f".. (Error: {e})"]
+
+        items.insert(0, "..")
+        
+        for i, item_name in enumerate(items):
+            if i >= h - 2: break
+            display_name = item_name
+            if os.path.isdir(os.path.join(path, item_name)):
+                display_name += "/"
+            
+            if i == selected_index:
+                stdscr.addstr(i + 1, 0, display_name, curses.color_pair(2))
+            else:
+                stdscr.addstr(i + 1, 0, display_name)
+
+        key = stdscr.getch()
+
+        if key == curses.KEY_UP:
+            selected_index = max(0, selected_index - 1)
+        elif key == curses.KEY_DOWN:
+            selected_index = min(len(items) - 1, selected_index + 1)
+        elif key == curses.KEY_ENTER or key in [10, 13]:
+            selected_item_path = os.path.join(path, items[selected_index])
+            if os.path.isdir(selected_item_path):
+                path = os.path.abspath(selected_item_path)
+                selected_index = 0
+            else:
+                return selected_item_path
+        elif key == 27: # ESC key
+            return None
 
 def main_menu(stdscr, slave_id):
-    """The main curses UI with a flicker-free, state-based drawing loop."""
+    global status_data, update_status
-    global status_data
+    curses.curs_set(0); stdscr.nodelay(1); stdscr.timeout(100)
-    curses.curs_set(0)
+    curses.start_color(); curses.init_pair(1, curses.COLOR_WHITE, curses.COLOR_BLUE); curses.init_pair(2, curses.COLOR_BLUE, curses.COLOR_WHITE); curses.init_pair(3, curses.COLOR_RED, curses.COLOR_BLUE)
-    stdscr.nodelay(1)
-    stdscr.timeout(100)
-
-    # --- Color Pairs ---
-    curses.start_color()
-    curses.init_pair(1, curses.COLOR_WHITE, curses.COLOR_BLUE)  # Main: white on blue
-    curses.init_pair(2, curses.COLOR_BLUE, curses.COLOR_WHITE)  # Selected: blue on white
-    curses.init_pair(3, curses.COLOR_RED, curses.COLOR_BLUE)    # Error: red on blue
     stdscr.bkgd(' ', curses.color_pair(1))
 
-    # --- UI State ---
+    menu = ["Open Valve", "Close Valve", "Stop Valve", "Toggle Output 1", "Toggle Output 2", "Set Watchdog", "Reset Node", "Firmware Update", "Exit"]
-    menu = ["Open Valve", "Close Valve", "Stop Valve", "Set Max Opening Time", "Set Max Closing Time", "Exit"]
     current_row_idx = 0
-    
+    message, message_time = "", 0
-    # State for transient messages
+    input_mode, input_prompt, input_str, input_target_reg = False, "", "", 0
-    message = ""
-    message_time = 0
-    
-    # State for user input
-    input_mode = False
-    input_prompt = ""
-    input_str = ""
-    input_target_reg = 0
 
     while not stop_event.is_set():
         h, w = stdscr.getmaxyx()
-        
-        # --- Handle Input and State Changes ---
         key = stdscr.getch()
 
-        if input_mode:
+        with update_lock: is_updating = update_status["running"]
-            if key in [10, 13]: # Enter
+
+        if is_updating:
+            pass
+        elif input_mode:
+            if key in [10, 13]:
                 try:
-                    seconds = int(input_str)
+                    value = int(input_str)
-                    client.write_register(input_target_reg, seconds, slave=slave_id)
+                    client.write_register(input_target_reg, value, slave=slave_id)
-                    message = f"-> Set time to {seconds}s"
+                    message = f"-> Set register 0x{input_target_reg:04X} to {value}"
-                except ValueError:
+                except Exception as e: message = f"-> Error: {e}"
-                    message = "-> Invalid input. Please enter a number."
+                message_time, input_mode, input_str = time.time(), False, ""
-                except Exception as e:
+            elif key == curses.KEY_BACKSPACE or key == 127: input_str = input_str[:-1]
-                    message = f"-> Error: {e}"
+            elif key != -1 and chr(key).isprintable(): input_str += chr(key)
-                message_time = time.time()
+        else:
-                input_mode = False
+            if key == curses.KEY_UP: current_row_idx = (current_row_idx - 1) % len(menu)
-                input_str = ""
+            elif key == curses.KEY_DOWN: current_row_idx = (current_row_idx + 1) % len(menu)
-            elif key == curses.KEY_BACKSPACE or key == 127:
-                input_str = input_str[:-1]
-            elif key != -1 and chr(key).isprintable():
-                input_str += chr(key)
-        else: # Navigation mode
-            if key == curses.KEY_UP and current_row_idx > 0:
-                current_row_idx -= 1
-            elif key == curses.KEY_DOWN and current_row_idx < len(menu) - 1:
-                current_row_idx += 1
             elif key == curses.KEY_ENTER or key in [10, 13]:
                 selected_option = menu[current_row_idx]
-                message_time = time.time() # Set time for all actions
+                message_time = time.time()
+                if selected_option == "Exit": stop_event.set(); continue
+                elif selected_option == "Open Valve": client.write_register(REG_HOLDING_VALVE_COMMAND, 1, slave=slave_id); message = "-> Sent OPEN command"
+                elif selected_option == "Close Valve": client.write_register(REG_HOLDING_VALVE_COMMAND, 2, slave=slave_id); message = "-> Sent CLOSE command"
+                elif selected_option == "Stop Valve": client.write_register(REG_HOLDING_VALVE_COMMAND, 0, slave=slave_id); message = "-> Sent STOP command"
+                elif "Toggle Output" in selected_option:
+                    bit = 0 if "1" in selected_option else 1
+                    try:
+                        current_val = client.read_holding_registers(REG_HOLDING_DIGITAL_OUTPUTS_STATE, count=1, slave=slave_id).registers[0]
+                        client.write_register(REG_HOLDING_DIGITAL_OUTPUTS_STATE, current_val ^ (1 << bit), slave=slave_id)
+                        message = f"-> Toggled Output {bit+1}"
+                    except Exception as e: message = f"-> Error: {e}"
+                elif selected_option == "Set Watchdog":
+                    input_mode, input_prompt, input_target_reg = True, "Enter Watchdog Timeout (s): ", REG_HOLDING_WATCHDOG_TIMEOUT_S
+                elif selected_option == "Reset Node":
+                    try:
+                        client.write_register(REG_HOLDING_DEVICE_RESET, 1, slave=slave_id)
+                        message = "-> Sent RESET command. Node should reboot."
+                    except Exception as e:
+                        message = f"-> Error sending reset: {e}"
+                elif selected_option == "Firmware Update":
+                    filepath = file_browser(stdscr)
+                    if filepath:
+                        threading.Thread(target=firmware_update_thread, args=(slave_id, filepath), daemon=True).start()
+                    else:
+                        message = "-> Firmware update cancelled."
 
-                if selected_option == "Exit":
-                    stop_event.set()
-                    continue
-                elif selected_option == "Open Valve":
-                    client.write_register(REG_HOLDING_VALVE_COMMAND, 1, slave=slave_id)
-                    message = "-> Sent OPEN command"
-                elif selected_option == "Close Valve":
-                    client.write_register(REG_HOLDING_VALVE_COMMAND, 2, slave=slave_id)
-                    message = "-> Sent CLOSE command"
-                elif selected_option == "Stop Valve":
-                    client.write_register(REG_HOLDING_VALVE_COMMAND, 0, slave=slave_id)
-                    message = "-> Sent STOP command"
-                elif "Set Max" in selected_option:
-                    input_mode = True
-                    input_prompt = f"Enter new value for '{selected_option}' (seconds): "
-                    input_target_reg = REG_HOLDING_MAX_OPENING_TIME_S if "Opening" in selected_option else REG_HOLDING_MAX_CLOSING_TIME_S
-
-        # --- Drawing Logic (Single Source of Truth) ---
         stdscr.clear()
-
+        if is_updating:
-        # 1. Draw Status Area
+            with update_lock: prog, msg = update_status["progress"], update_status["message"]
-        with status_lock:
+            stdscr.addstr(h // 2 - 1, w // 2 - 25, "FIRMWARE UPDATE IN PROGRESS", curses.A_BOLD | curses.color_pair(2))
-            current_data = status_data.copy()
+            stdscr.addstr(h // 2, w // 2 - 25, f"[{'#' * int(prog * 50):<50}] {prog:.0%}")
-        
+            stdscr.addstr(h // 2 + 1, w // 2 - 25, msg.ljust(50))
-        if current_data.get("error"):
-            stdscr.addstr(0, 0, current_data["error"], curses.color_pair(3) | curses.A_BOLD)
         else:
-            bold = curses.color_pair(1) | curses.A_BOLD
+            with status_lock: current_data = status_data.copy()
-            normal = curses.color_pair(1)
+            bold, normal = curses.color_pair(1) | curses.A_BOLD, curses.color_pair(1)
-            col1_x, col2_x, col3_x = 2, 35, 70
+            if current_data.get("error"): stdscr.addstr(0, 0, current_data["error"], curses.color_pair(3) | curses.A_BOLD)
-            stdscr.addstr(1, col1_x, "Valve State:", bold); stdscr.addstr(1, col1_x + 14, str(current_data.get('state', 'N/A')), normal)
+            else:
-            stdscr.addstr(2, col1_x, "Movement:", bold); stdscr.addstr(2, col1_x + 14, str(current_data.get('movement', 'N/A')), normal)
+                col1, col2, col3, col4 = 2, 30, 58, 88
-            stdscr.addstr(3, col1_x, "Motor Current:", bold); stdscr.addstr(3, col1_x + 14, str(current_data.get('motor_current', 'N/A')), normal)
+                stdscr.addstr(1, col1, "State:", bold); stdscr.addstr(1, col1 + 18, str(current_data.get('state', 'N/A')), normal)
-            stdscr.addstr(1, col2_x, "Max Open Time:", bold); stdscr.addstr(1, col2_x + 16, str(current_data.get('open_time', 'N/A')), normal)
+                stdscr.addstr(2, col1, "Movement:", bold); stdscr.addstr(2, col1 + 18, str(current_data.get('movement', 'N/A')), normal)
-            stdscr.addstr(2, col2_x, "Max Close Time:", bold); stdscr.addstr(2, col2_x + 16, str(current_data.get('close_time', 'N/A')), normal)
+                stdscr.addstr(3, col1, "Motor Current:", bold); stdscr.addstr(3, col1 + 18, str(current_data.get('motor_current', 'N/A')), normal)
-            stdscr.addstr(1, col3_x, "Firmware:", bold); stdscr.addstr(1, col3_x + 11, str(current_data.get('firmware', 'N/A')), normal)
+                stdscr.addstr(1, col2, "Digital Inputs:", bold); stdscr.addstr(1, col2 + 18, str(current_data.get('digital_inputs', 'N/A')), normal)
-            stdscr.addstr(2, col3_x, "Uptime:", bold); stdscr.addstr(2, col3_x + 11, str(current_data.get('uptime', 'N/A')), normal)
+                stdscr.addstr(2, col2, "Digital Outputs:", bold); stdscr.addstr(2, col2 + 18, str(current_data.get('digital_outputs', 'N/A')), normal)
-        stdscr.addstr(5, 0, "─" * (w - 1), normal)
+                stdscr.addstr(3, col2, "Button Events:", bold); stdscr.addstr(3, col2 + 18, str(current_data.get('button_events', 'N/A')), normal)
-
+                stdscr.addstr(1, col3, "Max Open Time:", bold); stdscr.addstr(1, col3 + 16, str(current_data.get('open_time', 'N/A')), normal)
-        # 2. Draw Menu Buttons
+                stdscr.addstr(2, col3, "Max Close Time:", bold); stdscr.addstr(2, col3 + 16, str(current_data.get('close_time', 'N/A')), normal)
-        for idx, row in enumerate(menu):
+                stdscr.addstr(3, col3, "Watchdog:", bold); stdscr.addstr(3, col3 + 16, str(current_data.get('watchdog', 'N/A')), normal)
-            x = w // 2 - (len(row) + 4) // 2
+                stdscr.addstr(1, col4, "Firmware:", bold); stdscr.addstr(1, col4 + 14, str(current_data.get('firmware', 'N/A')), normal)
-            y = h // 2 - len(menu) + (idx * 3)
+                stdscr.addstr(2, col4, "Uptime:", bold); stdscr.addstr(2, col4 + 14, str(current_data.get('uptime', 'N/A')), normal)
-            draw_button(stdscr, y, x, row, idx == current_row_idx)
+                stdscr.addstr(3, col4, "Dev. Status:", bold); stdscr.addstr(3, col4 + 14, str(current_data.get('device_status', 'N/A')), normal)
-
+                stdscr.addstr(4, col4, "Supply V:", bold); stdscr.addstr(4, col4 + 14, str(current_data.get('supply_voltage', 'N/A')), normal)
-        # 3. Draw Transient Message or Input Prompt
+            stdscr.addstr(5, 0, "─" * (w - 1), normal)
-        if time.time() - message_time < 2.0:
+            for idx, row in enumerate(menu):
-            stdscr.addstr(h - 2, 0, message.ljust(w - 1), curses.color_pair(1) | curses.A_BOLD)
+                draw_button(stdscr, h // 2 - len(menu) + (idx * 2), w // 2 - len(row) // 2, row, idx == current_row_idx)
-        
+            if time.time() - message_time < 2.0: stdscr.addstr(h - 2, 0, message.ljust(w - 1), curses.color_pair(1) | curses.A_BOLD)
-        if input_mode:
+            if input_mode:
-            curses.curs_set(1)
+                curses.curs_set(1); stdscr.addstr(h - 2, 0, (input_prompt + input_str).ljust(w-1), curses.color_pair(2)); stdscr.move(h - 2, len(input_prompt) + len(input_str))
-            stdscr.addstr(h - 2, 0, (input_prompt + input_str).ljust(w-1), curses.color_pair(2))
+            else: curses.curs_set(0)
-            stdscr.move(h - 2, len(input_prompt) + len(input_str))
-        else:
-            curses.curs_set(0)
-
         stdscr.refresh()
 
 def main():
     global client
     parser = argparse.ArgumentParser(description="Modbus tool for irrigation system nodes.")
-    parser.add_argument("port", help="Serial port (e.g., /dev/ttyACM0)")
+    parser.add_argument("port", help="Serial port"); parser.add_argument("--baud", type=int, default=19200); parser.add_argument("--slave-id", type=int, default=1); parser.add_argument("--interval", type=float, default=1.0)
-    parser.add_argument("--baud", type=int, default=19200, help="Baud rate")
-    parser.add_argument("--slave-id", type=int, default=1, help="Modbus slave ID")
-    parser.add_argument("--interval", type=float, default=1.0, help="Polling interval (sec)")
     args = parser.parse_args()
-
     client = ModbusSerialClient(port=args.port, baudrate=args.baud, stopbits=1, bytesize=8, parity="N", timeout=1)
-    if not client.connect():
+    if not client.connect(): print(f"Error: Failed to connect to serial port {args.port}"); sys.exit(1)
-        print(f"Error: Failed to connect to serial port {args.port}")
+    print("Successfully connected. Starting UI..."); time.sleep(0.5)
-        sys.exit(1)
+    threading.Thread(target=poll_status, args=(args.slave_id, args.interval), daemon=True).start()
-
+    try: curses.wrapper(main_menu, args.slave_id)
-    print(f"Successfully connected to {args.port}. Starting UI...")
-    time.sleep(0.5)
-
-    poll_thread = threading.Thread(target=poll_status, args=(args.slave_id, args.interval))
-    poll_thread.daemon = True
-    poll_thread.start()
-
-    try:
-        curses.wrapper(main_menu, args.slave_id)
     finally:
         stop_event.set()
         print("\nExiting...")
-        if client.is_socket_open():
+        if client.is_socket_open(): client.close()
-            client.close()
-        poll_thread.join(timeout=2)
 
 if __name__ == "__main__":
     main()