Because it uses the serial communication method, it’s easy to interface with the UART of almost all popular microcontrollers. There are 12 connections in total (6×2 rows) on the SIM800L module and, ...

but since this post is about “interfacing an arduino with a serial lcd controller”, i’m quite disappointed. old lcd panels in my junk box: 4. lcd panels with serial controller: none.

The code (Arduino sketch) is a basic one without any dedicated SIM800L libraries. In the code, the RX and TX pins are assigned as software serial pins. This is done deliberately so that the Arduino’s ...