This is a conversion of a library by vittorioexp. His library was designed to use SoftwareSerial, and this one is designed to use hardware serial. Additionally, his implimentation seems to have been ...

It is very easy to build an “SMS-controlled relay” with the help of a cheap GSM modem module and a small microcontroller board. Here, I’m using the SIM800L and Arduino Nano V3 to develop a nifty ...

I've connected my arduino nano to sim800l in a correct order but the LED on sim800l didn't turn on, and also the sim800l was heated a little. (I used a 12V-15A power source with a Module LM2596 to ...