I would like to send sms when the status of a switch is changed. I have choosed to use an Arduino Ethernet and Gsm Shield 2 but I can not get this work properly :
Sometimes the Gsm shields connects properly but most of the time it is not connected. I have seen on the forum that a lot of persons have this problem but I don't find any concrete solution ...
I run the SMS Messages Sender and get the message : AT%13% 0 6>%13%%10%OK%13%%10% AT+CPIN=2925%13% 6 23>%13%%10%+CME ERROR: 3%13%%10% Not connected
The gsm shield is powered with a 1000mA power supply The SIM is placed on the board and the PIN is introduced into the code. The status light is ON and the NET light is blinking. It's an Arduino Gsm Shield 2 : so it has an integrated antenna. I have tested with a new second Arduino and same problem.
Do you have an idea of what I can do to make it work ? Is this Gsmshield the right tool ? Is there another solution more reliable ?
Thanks for your help Mario