i’m using arduino uno + sim900 icomsat v1.1
i want to test my gsm module with my library but i have problem.
when i test with GSM library
GSM Shield testing.
Trying to force the baud-rate to 9600
ERROR: SIM900 doesn’t answer. Check power and serial pins in GSM.cpp
and in my picture sim 900 error.jpg always ATT : OK | RIC : | ERROR
please help me :"(