The SIM800 is a low cost SMS module that you can use in electronic/IoT projects. It does have a few quirks, though. I set one up here and show how to send and receive text messages.

See also:
Tutorial on the SIM900 modue: [ Ссылка ]
Tutorial on the M590 module: [ Ссылка ]
My github site: [ Ссылка ]

AT command reference for the SIM800: [ Ссылка ]

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