![]() ![]() Using the USB power through the computer is not enough while HTTP communication. As the chipset can draw 2A maximum, it is better to use an external power source.I personnaly use a module with voltage convertor from/to 5V like this one. ![]() So, don't connect the naked module directly on the Arduino. The original module is working with an input voltage of 3.7V to 4.2V.The available AT commands are described in the SIM800 series AT Command Manual. The communication with the SIM800L module relies on AT commands.The SIM800L is a GSM/GPRS module built by SIMCom.The library has been designed to limit the memory usage by working with the same shared buffer all the time. The library supports the HTTP, the HTTPS, GET method, POST method, GPRS setup, power mode and network registration. This is a comprehensive Arduino library to make HTTP or HTTPS communication through the SIMCom SIM800L module.
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