SIM800L GPRS GSM Module MicroSIM Card Core Board Quad-Band TTL Serial Port for ESP8266 ESP32

GSM module is a great additional feature to  your next projects. There are actually a lot   of GSM module available in the market but I  personally recommend and prefer the SIM800L   due to its size and simplicity. It has a small  footprint so it occupies a very small space   in your project. This is because SIM800L only  provides the basic core of GSM, meaning to say,   you need to provide additional circuitry to use  it. But don't worry, I will show you the simplest   way to use it. So stay tuned. SIM800L is capable  of the following functions: sending and receiving   SMS, making or answering voice calls, and it  has a mobile Internet data available as GPRS   communication protocol. The SIM800L GSM module is  beautifully designed so that the pins are arranged   logically like a Dual Inline Package (DIP).  Suitable for breadboard. So as you can see,   the pins in the left side is all w