I have designed a system which would give me my location using a GPShttp://www.4dsystems.com.au/prod.php?id=106 receiver. Its been working quite well for past 3 months.
Then I didn't use it for a month and then when I used it again, It is giving me another format of data. i.e at first my data string used to be starting with $GPGGA,$GPGSA etc.
But now it is giving strange strings like $PMTK010 etc. After searching I found that the strings I received is of MTK NMEA format. But then when I kept the GPS for synchronisation again. The GPS did not synchronise.What might be the problem.
As soon as I switch off and switch on the power of the system,I am receiving $GPGGA strings but after sometime it stops and starts giving me $PMTK strings as you can see from the screen shot.What might be the problem?
I am attaching the screenshot of the data received from GPS through XBEE.
Thanks in advance.