It's the same as the Megasquirt 2 (same manufacture software etc), but smaller and cheaper: https://www.diyautotune.com/product/...t-module-v2-2/
It was originally sold for bikes and such in a water tight case, but that has a few less pins.
You can now buy just the module and it has a few extra.
It looks like pin 20 is an input from the climate control, and 22 controls the AC clutch directly, so I'll need to do something with that (the Arduino will control that).
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