>>> I am looking for a device that sits transparently in an RS-232 serial line >>> and upon seeing a particular code go over the serial line ((or sequence of >>> codes) will actual a relay (or a transistor). Something with two DB25s or >>> DE9s and is configurable to what code will trigger the output? Some kind of >>> box? >> >> not that it's easy but a raspberry pi could be set up to watch the serial >> line. > > Or even cheaper, and Arduino uno
I second the Arduino recommendation. I have a Power Mac G4 with a serial dongle that drives an Arduino Nano-based IR blaster. It sends serial commands to it and the blaster transmits a signal to the room air conditioner. Should be easy to adapt the GPIO pins to a relay. Arduino programming and interfacing is pretty straightforward. https://oldvcr.blogspot.com/2022/10/ir-controlling-new-air-conditioner-in.html -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com -- The more corrupt the state, the more numerous the laws. -- Tacitus ---------
