updates to Hello message from AgOpenGPS

only update last message time received from current AgOpenGPS IP
switch to new AgOpenGPS IP Address when last Hello is more than 4
seconds ago
when last Hello is more than 5 seconds ago, start broadcasting to 255

Author: reubenrissler

AOG_GPS_ESP32/src/headingAndPosition.cpp

@@ -758,6 +758,9 @@ void headingAndPosition ( void* z ){
 			else if( ( millis() - powerUnstableMillis ) / 60000 > 5){
 				powerUnstable = false;
 		}
+		if( millis() - lastHelloReceivedMillis > 5000 ){
+			ipDestination = IPAddress( 192, 168, 5, 255 );
+		}
 
 		vTaskDelayUntil( &xLastWakeTime, xFrequency );
 	}

AOG_GPS_ESP32/src/main.cpp

@@ -101,8 +101,13 @@ void setup( void ) {
       switch( pgn ){
         case 32712: {
           // PGN32712, Hello from AgIO to module
-          ipDestination = packet.remoteIP();
-          lastHelloReceivedMillis = millis();
+          IPAddress address = packet.remoteIP();
+          if( ipDestination == address ){ // only send GPS to current AgOpenGPS
+            lastHelloReceivedMillis = millis();
+          } else if ( millis() - lastHelloReceivedMillis > 4000 ){ // AgOpenGPS Hello timed out
+            ipDestination = address; // switch to new AgOpenGPS address
+            lastHelloReceivedMillis = millis();
+          }
         }
         break;