I have a board that uses an UP501 GPS module. My script sends a command that will make the UP501 only send out the RMC NMEA strings. It worked fine for a time but now all of a sudden it stopped accepting the commands and sends out all of the strings. I have verified that the micro controller is sending out the command which is:
mySerial.println("$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0*35");
The reason I am concerned is that this is the 3rd GPS module that worked fine for a while and then stopped accepting commands. The first two were Maestro A2035 receivers and this one is a Fastrax UP501. Has anyone else had this problem with GPS modules?