Current weekend fun/hack project - controlling hot tub via raspberry pi.
Goal is to be able to schedule to monitor energy usage and save some energy and be able to heat/check temp remotely.
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Wiring is now functional - powering the pi from the input terminals and a 120V -> 5V converter, and split the RJ45 jack to the control pad and hooked everything up to the pi GPIO.
Took me a bit to figure out how to run piscope to see the signals, but got that working, and now to decode the signals...