Trying to harness the #fediverse #electronics #hobbyist #brain ...

I've got a busted consumer product here that has 2 #Holtek #microcontrollers in it. Either one would be sufficient to run this product (a brushless-motor tower fan), but #MCUs are cheap, so why not throw a second one in if it saves a few centimeters of wire?

I'm trying to determine if there's a #standard #serial #physical #layer in use here to communicate from one #MCU to the other. It's one-way communication.

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