I am using EFCom/GPRS Shield which is a GSM shield using SIM900, as these GSM modules consume a lot of current, I decided to buy 12V/2A adapter.
however, the GSM shield keeps restarting even though its connected to the arduino (the STA (status) pin turns off and on while try to connecting to the network)
here is a picture of my arduino and the adapter,
here is a picture of the LEDS of this shield
the problem is:I can not connect to the network - the NET led is blinking every 800 ms which means the shield is trying to connect to the network (it should be blinking every 3s to be connected to network) - and while the NET LED is blinking, the STA (status) LED turns off and on from time to time which means the shield is restarting
can you advise on this ?