NMEA ATGM336 - support 10Hz refresh rate (#12008)

* NMEA ATGM336 - support 10Hz refresh rate, the gps should be set to 57600pbs, autobound/autoconfig not required

* Update src/main/io/gps.c

Co-authored-by: Jan Post <Rm2k-Freak@web.de>

* Update src/main/io/gps.c

Co-authored-by: Jan Post <Rm2k-Freak@web.de>

Co-authored-by: Jan Post <Rm2k-Freak@web.de>

src/main/io/gps.c

@@ -359,6 +359,7 @@ void gpsInit(void)
 #ifdef USE_GPS_NMEA
 void gpsInitNmea(void)
 {
+    static bool atgmRestartDone = false;
 #if !defined(GPS_NMEA_TX_ONLY)
     uint32_t now;
 #endif
@@ -395,6 +396,12 @@ void gpsInitNmea(void)
                gpsData.state_position++;
            } else if (gpsData.state_position < 2) {
                serialPrint(gpsPort, "$PSRF103,00,6,00,0*23\r\n");
+                // special initialization for NMEA ATGM336 and similar GPS recivers - should be done only once
+               if (!atgmRestartDone) {
+                   atgmRestartDone = true;
+                   serialPrint(gpsPort, "$PCAS02,100*1E\r\n");  // 10Hz refresh rate
+                   serialPrint(gpsPort, "$PCAS10,0*1C\r\n");    // hot restart 
+               }
                gpsData.state_position++;
            } else
 #else