I think this could has to do with the APN my provider, which must be set before the internet connection. I tried to set the APN with AT+CSTT in GPRS::connectTCP in gprs.cpp with no success. On wiki there is no info, can somebody help how to this?
Try using the example sketch from Seeduino_GPRS_Master, named SIM800_Serial_Debug example.
Then you could use AT commands directly and get response from Seeduino GPRS.
This will help you to test a lot of parameters from your Seeduino GPRS and your Sim Card.
To check your APN you could type:
AT+CSTT?
Then, if that APN is not the rigth one you can change it by:
AT+CSTT=“myAPN”
If you still having problems maybe is because you need to put more parameters, if you type the at command follow by “=?” it will show you the values that the order could have.
I couldn’t get the board with the Seeeduino GPRS library but it works with AT commands. I implemented also the connection manually without the library.
I can set the APN as following without problems:
GPRS.println(“AT+CSTT=“APN””);
My problem now is that the SIM800H is automatically powering on after 30 seconds later I close the connection. But I will open a new topic with details.
