v1.5.1: envoi firmware version dans payload UDP (bytes 69-71)

- Lecture fichier VERSION et pack major.minor.patch dans bytes 69-71
- README: documentation complete structure 100 bytes + conso data
- Changelog mis a jour

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

loop/SARA_send_data_v2.py

@@ -386,6 +386,16 @@ class SensorPayload:
         """Set device status flags (byte 68)"""
         self.payload[68] = status & 0xFF
 
+    def set_firmware_version(self, version_str):
+        """Set firmware version bytes 69-71 (major.minor.patch)"""
+        try:
+            parts = version_str.strip().split('.')
+            self.payload[69] = int(parts[0]) & 0xFF
+            self.payload[70] = int(parts[1]) & 0xFF
+            self.payload[71] = int(parts[2]) & 0xFF
+        except (IndexError, ValueError):
+            pass  # leave as 0xFF if VERSION file is malformed
+
     def get_bytes(self):
         """Get the complete 100-byte payload"""
         return bytes(self.payload)
@@ -1126,6 +1136,13 @@ try:
         error_flags |= ERR_RTC_RESET
     payload.set_error_flags(error_flags)
 
+    # ---- Firmware version (bytes 69-71) ----
+    try:
+        with open("/var/www/nebuleair_pro_4g/VERSION", "r") as f:
+            payload.set_firmware_version(f.read())
+    except FileNotFoundError:
+        pass
+
     if send_miotiq:
         print('<p class="fw-bold">➡️SEND TO MIOTIQ</p>', end="")