GM862 GPS problem with AT$GPSACP

GPS/GNSS Development Boards
1

Hi there,

I have a problem with my GM862-GPS.

I managed so far interfacing it with an ATmega8. What works:

  • switching it on and off

  • initializing it

  • pulling gps position through the AT command AT$GPSACP (second serial port is unused)

  • sending position as SMS.

Now I try to do these things in a loop.

The problem is, that after sending the SMS, further AT commands only are echoed, but no “OK” or error is returned. It is not a problem of the microcontroller as I have checked it with a direct PC to GM862 serial communication.

Any hint, someone?

Cheers,

Alex

2

After some more tweaking and debugging I found my error.

The SMS has to end with 0x1A and I added an additional CR. If I leave that one out, everything runs fine.

Cheers,

Alex