I have an iComSat v1.0 Arduino shield from iteadstudio and I still can’t get it working properly.
SIM900 GSM/GPRS shield for Arduino - IComSat v1.0
IComsat is a GSM/GPRS shield for Arduino and based on the SIM900 Quad-band GSM/GPRS module. It is controlled via AT commands (GSM 07.07)
I bought the shield from:
iteadstudio.com/store/index.php? … cts_id=413
These are the problems that myself and many other people are experiencing:
arduino.cc/forum/index.php/topic … #msg609237
I keep getting a problem:
system startup
no response
SMS ERROR
etc, etc