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I'm using the new version of this one: https://tscommunication.com/
Their new version has 4 user inputs and 4 or 6 user outputs. The both are controllable via SMS
you need to know the at+ commands, it's the same for all manufacturers.
Also you must make an interface to the movil phone because it works with 3.7 volts aonly
hello!! i also have a problem in interfacing the pic to the gsm module. can anybody send me a pic coding conversion for the at command? i am having a problem on that topic. tnx
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