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It's Aliveeee
Nah really this was like 6:30 last night. Around 10pm I had the full board wired up with a python flask app to control the relay via gpio.
It's nice, now I need an rpi zero for the controller and I think this is as good as done.
@chuck Nice! I did something similar recently with the same board, a teensy 3.6, and a BLE HM-10 module. Those sainsmart boards (or their clones) are nice; no need to put a fake load or a flyback diode.
If I can ask: what's the load the relays will be switching?