how to connect automatically the GSM sim900D in the network without pressing the power button? tnx
http://www.etteam.com/prod2013/et-base%20gsm%20sim900/ET-BASE%20GSM%20SIM900.pdf
http://www.etteam.com/prod2013/et-base%20gsm%20sim900/ET-BASE%20GSM%20SIM900.pdf