I have a system that uses RS232 serial communication that I’ve run off a RaspberryPi for years using Mono (.NET) framework. It works well, but I would really like to simplify the setup considerably although I have never done any type of RS232 work in the Particle / Arduino environment, so I’d like to know where to start.
The system sends 50 bytes of data every second. Currently I store all of the data on the Pi and then once every 15 mins I average out the data and push it to a web service. This keeps the web communications less chatty.
Here is some technical info:
My serial output requires that the DTR (pin 4) be driven high (set) and that RTS (pin 7) be driven low (cleared), in order to power the port. The hardware transmits data on the RX (pin 2) line, and listens for commands on the TX (pin 3) line. GND (pin 5) is ground. No other pins are used.
The output is just ASCII data. Nothing special, but it does change on the second quite often. Having each second of data is important.
Has anyone done this and what is the best way to get started? I’ve coded for years, but I am still green on hardware so any good reads or hardware starts would be awesome. Let me know if you need more info.