Serial port stops responding

2 thoughts on “Serial port stops responding

  1. I’m developing an application with GPS and GSM on a GM862 and yesterday something really strange happend, and after a few days working the serial port just stops responding.


    It recovers itself after 40 minutes.


    What could do that?


    One of the mistake that I did was not having a guardtime before and after escape sequence (+++), could be that?




    1. ok, before and after escape sequence (+++) you have to put a guard time.

      Anyway which is the firmware (at+cgmr)?

      which is the at command sequence used?