Hi. I am new in GSM shield. Using sim900 I successfully connected my Arduino Uno to pin 4 and pin 5 with library BETA_GSM_GPRS_GPS_IDE100_v304.. For some reason the code authorization doesn't really do anything even though I have 1 phone-book save in the SIMCARD the other SMS that is not save in t…

Authorized SMS using GSM SHIELD

system March 6, 2013, 4:27am 2

What is the output you are getting with the code you posted?

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