v1.12.0: transmission CO2 S88 dans le payload UDP Miotiq (byte 81)

Débloque le WIP S88->Miotiq. Spec serveur reçue: byte 81-82 = CO2 (ISO_17,
uint16 ppm). Source = Senseair S88 (vrai CO2 NDIR).

- SensorPayload.set_co2() -> bytes 81-82 (uint16, clamp 0..65535)
- lecture data_S88 (derniere ligne) si config S88 active, puis set_co2
- defaut 0xFFFF = capteur absent
- canal UDP Miotiq uniquement (CSV/JSON non touches)
- error_flags.md: byte-map a jour (81-82 = CO2)

CCS811 (TVOC/eCO2) NON transmis: pas encore de champ dans la spec Miotiq.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

loop/SARA_send_data_v2.py

@@ -243,9 +243,10 @@ send_uSpot = config.get('send_uSpot', False)                        #envoi sur M
 npm_5channel = config.get('npm_5channel', False)                    #5 canaux du NPM
 envea_cairsens= config.get('envea', False)
 wind_meter= config.get('windMeter', False)
-bme_280_config = config.get('BME280', False)  
+bme_280_config = config.get('BME280', False)
 mppt_charger = config.get('MPPT', False)
 NOISE_sensor = config.get('NOISE', False)
+s88_sensor = config.get('S88', False)
 
 #update device id in the payload json
 payload_json["nebuleairid"] = device_id
@@ -373,7 +374,14 @@ class SensorPayload:
             self.payload[62:64] = struct.pack('>H', int(speed * 10))
         if direction is not None:
             self.payload[64:66] = struct.pack('>H', int(direction))
-    
+
+    def set_co2(self, co2_ppm):
+        """Set CO2 (bytes 81-82, uint16 ppm) — ISO_17 in the Miotiq spec.
+        Source: Senseair S88 (true NDIR CO2). Default stays 0xFFFF (constructor
+        fills 0xFF) = sensor absent. NOT for CCS811 eCO2 (a derived value)."""
+        if co2_ppm is not None:
+            self.payload[81:83] = struct.pack('>H', max(0, min(int(co2_ppm), 65535)))
+
     def set_error_flags(self, flags):
         """Set system error flags (byte 66)"""
         self.payload[66] = flags & 0xFF
@@ -1073,7 +1081,19 @@ try:
             payload.set_noise(
                 cur_leq=cur_LEQ,       # current LEQ (dBA)
                 cur_level=cur_level    # current level (dBA)
-            ) 
+            )
+
+    # S88 CO2 sensor (Senseair S88, NDIR) -> byte 81-82 (ISO_17, uint16 ppm)
+    if s88_sensor:
+        print("➡️Getting S88 CO2 value")
+        cursor.execute("SELECT * FROM data_S88 ORDER BY rowid DESC LIMIT 1")
+        last_row = cursor.fetchone()
+        if last_row and last_row[1] is not None:
+            co2_ppm = last_row[1]
+            print(f"CO2 (S88): {co2_ppm} ppm")
+            payload.set_co2(co2_ppm)
+        else:
+            print("No S88 data available in the database.")
 
     #print("Verify SARA connection (AT)")