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Topic: GSM not working with Arduino UNO (Read 326 times) previous topic - next topic


Hi, I've beeb trying to set a sketch to send and receive SMS but it looks there is a problem with my SIM card, I tried different options setting up the module to be able to standby to read messages. I tried CNMI (1,2,0,0,0) and (2,2,0,0,0) but no one works. I live in Mexico and I'm using Movistar operator. Would you please help me with any recommendations or a sketch to verify what the problem is?
Thank you!

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