i am using arduino uno and sim808. i connected the sim808 to pins 2,3 on arduino uno and used GSM library. i tested all examples: make and receive a call or messages. the part of GPRS initialization is not working after many tries in changing APN and pin number. i want to use the arduino as a webserver exactly as the example includded in the library. any one can help? thanks, https://www.arduino.cc/en/Reference/GSM

1 Answer 1


I had the same problem I solved it by moving the jumper wires on the shield(if you are using one) to SW serial. if that doesn't work try testing it with AT commands

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.