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Topic: gsmAccess.begin() problem (Read 5357 times) previous topic - next topic


Often, the sketch stop on "gsmAccess.begin(PINNUMBER)" instruction... But if I make the phone call rings so there is no network problem. Library problems??? Help me. Thank You.



I have the same problem, I try to unite everybody who has this problem to the same post, so we can search together for a solution.



Replace line "GSM gsmAccess();" with "GSM gsmAccess(true);" to activate debug mode.


This will only print out the AT-Commands, the Problem will still occur, and the Output will be CREG: 0,2 or something like this, the problem is that the GSM library doesn't have a catch or something for this case so it won't return anything, neither GSM_READY nor ERROR or anything, thus crashing the whole sketch without being stopped.


I am having what appears to be the same problem. I have tried two different SIM's, one being the Telefonica M2M which came with the Shield and the other another data SIM tested in another product.

Its a new Shield which I received today and I have tried several of the sample projects.

The gsmAccess.begin never returns and hangs, I am Monitoring the serial port, only once and last message received:
"GSM networks while not Connected" :~

// Default no SIM
// Start GSM shield
  // If your SIM has PIN, pass it as a parameter of begin() in quotes
    Serial.println("GSM networks while not Connected");
      notConnected = false;
      Serial.println("Not connected");


I have a similar problem in the example's SendSMS sketch. I have a SIM900 with Mega and I have configured by bending pin 2 and using a jumper between pins 2 and 10.
However, it gets stuck at " gsmAccess.begin(PINNUMBER) " line of the code. When I enabled debugging on gsmAccess, the serial monitor shows "AT%13%".
Does anyone have any suggestions that I could try to solve this?



I still cannot get this resolved, just wondering did anyone else make any progress on this?


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