I have a few questions related to GPRS/GSM SIM900 Shield not working with Arduino.
To keep it short I have a list of concrete questions:
- Is the Arduino GSM library compatible with the Geeetech GPRS/GSM SIM900 Shield?
- On the board the green LED blinks every 3 seconds which I have read
means that it is connected. However, when I try to use any of the
GSM examples, in regard to internet, I either get error messages or
simply no progress in the program. For instance, in the
testGPRSsketch it sits stuck at the port where it says "Connecting GSM network...". And in the
bandManagementexample sketch it can't find the current band,as well as the modem not responding, well basically nothing works, except that the shield itself indicates it is connected to a network.
The SIM card I'm using is data exclusively and can't be used for voice calls or SMS. It has no pin code and works as my secondary SIM card (it shares the same subscription as my primary card).
Edit: I have now tested the SMS capabillities of the board with another simcard, that works with no problems, seems only the internet won't work.