diff --git a/buzzer_tool/core/connection.py b/buzzer_tool/core/connection.py
index 3a46d8f..d440ea3 100644
--- a/buzzer_tool/core/connection.py
+++ b/buzzer_tool/core/connection.py
@@ -1,6 +1,7 @@
 # core/connection.py
 import serial
 import time
+import os
 
 class BuzzerError(Exception):
     pass
diff --git a/firmware/src/protocol.c b/firmware/src/protocol.c
index 206b097..0f8c051 100644
--- a/firmware/src/protocol.c
+++ b/firmware/src/protocol.c
@@ -83,7 +83,7 @@ int put_binary_file(const char *filename, ssize_t filesize, uint32_t expected_cr
     uint32_t retry_count = 0;
 
     fs_file_t_init(&file);
-
+    LOG_DBG("Opening file '%s' for writing (expected size: %zd bytes, expected CRC32: 0x%08x)", filename, filesize, expected_crc32);
     rc = fs_open(&file, filename, FS_O_CREATE | FS_O_WRITE);
     if (rc < 0)
     {
@@ -93,6 +93,7 @@ int put_binary_file(const char *filename, ssize_t filesize, uint32_t expected_cr
 
     usb_write_buffer((const uint8_t *)"READY\n", 6);
 
+    uint32_t start = k_uptime_get_32();
     while (bytes_written < filesize)
     {
         size_t to_write = MIN(sizeof(buffer), filesize - bytes_written);
@@ -140,7 +141,9 @@ int put_binary_file(const char *filename, ssize_t filesize, uint32_t expected_cr
 
         bytes_written += written;
     }
-
+    uint32_t duration = k_uptime_get_32() - start;
+    uint32_t kb_per_s = (filesize * 1000) / (duration * 1024 +1);
+    LOG_DBG("Received file '%s' (%zd bytes) in %u ms (%u kb/s), CRC32: 0x%08x", filename, filesize, duration, kb_per_s, running_crc32);
     fs_close(&file);
 
     if (running_crc32 != expected_crc32)