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 ...

About Arduino Serial (RS232) to Ethernet gateway, dynamically configurable. Makes your RS232 devices network-compatible.

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 ...

Balluff has added this neatly-packaged bi-directional interface for connecting RS232 cables to IO-Link (IEC 61131-9) cables. “The converter lets you connect devices like barcode scanners, printers or ...