Webultra compact (28 x 22 mm) GSM/GPRS industrial wireless module. support for both 900MHz and 1800MHz GSM frequencies. standard AT instruction set (a very easy way … WebApr 14, 2015 · Cheap GSM module (SIM800) not connecting to the network Using Arduino Project Guidance kuruki March 5, 2015, 8:50pm #1 Hi, i recently received a cheap (around 12$) GSM module, namely the SIM800. It is the same one used by Adafruit Fona. I can communicate with it through the serial port, sending AT commands etc.
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