I am new to Arduino, although I have had 40 years of practice with industrial control systems.
I have a project in my mind that requires an SMS driven control system. I have hit a hurdle that I was hoping someone could help me with.
I have a Leonardo and a SIM900 GSM Shield.
I downloaded the Test Code from the page above, compiled and uploaded. I get the following Message
"Trying to force the baud-rate to 9600 1200 2400 4800 9600 19200 38400 57600 115200 ERROR: SIM900 doesn't answer. Check power and serial pins in GSM.cpp status=IDLE"
I followed this up a bit and can see that the message is coming from the included librarys GSM.h and GSM.cpp. The way I understand this is that it really is saying that the GSM shield can not connect to the phone network.
The sim card is OK, I have tried with two different sim cards, both work in a phone but give the same error message in the GSM Shield.
Is anyone able to help me work out what is going wrong?
I am sure I have enough power, USB and a 12V car battery. The GSM.cpp assigns pin 8 and 9, this seems to be correct.