Hi there,
I bought an SIM900 from amazon but i couldn't get him to send sms, sorry if i mad any mistaks, but i realy need your help, can you look to the attached pics and tell me the pins i need to attach.
I set jumpers to D8 and D7, then i connect this pins to D10 and D11 of the arduino mega, but it is not working !
Waiting for your answers
Thanks.
