Hello,
im trying to send a SMS with a SIM900 Modul.
It says RDY +CFUN: 1 +CPIN: READY.
I tried couple wirings and codes.
Attached the current one.
I read about the jumpers, could this be the problem? I tried to pull one out like in the article where i read about it but still no SMS.
Im not getting a response at all when i enter "s".