Count Beidou satellites for average SNR

main/gps.cpp

@@ -173,6 +173,7 @@ static void ProcessGSV(NMEA_RxMsg &GSV)              // process GxGSV to extract
        if(GSV.isGPGSV()) { SatSys=0; }
   else if(GSV.isGLGSV()) { SatSys=1; }
   else if(GSV.isGAGSV()) { SatSys=2; }
+  else if(GSV.isBDGSV()) { SatSys=3; }
   else return;
   if(GSV.Parms<3) return;
   int8_t Pkts=Read_Dec1((const char *)GSV.ParmPtr(0)); if(Pkts<0) return;            // how many packets to pass all sats

main/nmea.h

@@ -207,6 +207,12 @@ inline uint8_t NMEA_AppendCheckCRNL(char *NMEA, uint8_t Len) { return NMEA_Appen
        if(Data[4]!='S') return 0;
        return Data[5]=='V'; }
 
+   uint8_t isBDGSV(void) const                   // BEIDOU satellite data
+     { if(!isBD()) return 0;
+       if(Data[3]!='G') return 0;
+       if(Data[4]!='S') return 0;
+       return Data[5]=='V'; }
+
    uint8_t isGPTXT(void) const                   // GPS test message
      { if(!isGP()) return 0;
        if(Data[3]!='T') return 0;