For the challenge, I wanted to send data from my computer's real serial port (RS232 9-pin connector). For that, I created an adaptor circuit because the voltages on a computer serial port are ...

DSC - Integration with SmartThings (RS232). Contribute to yracine/DSC-Integration-with-Arduino-Mega-Shield-RS-232 development by creating an account on GitHub.

Arduino and PLCs Hook Up Via RS232 and Modbus There is a thriving online developer community using RS232, Arduinos, and PLCs to build industrial and home automation systems on the familiar serial ...