8/8/2023 0 Comments Sim900 st nucleo![]() Originally developed by the modem maker Hayes as means to operate their dial-up landline products, AT commands - the ‘AT’ stands for ‘come to ATtention’ - are now used by all modems, of all types. WebAT commands are essentially modem instructions. But before you do anything in code, practice sending. Once you have basic serial comms working, then it's just a matter of creating the required strings, and sending them receiving the responses, and parsing them. So the first thing to do is to get your basic serial comms working. WebAT commands are just about sending
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