It's all bits, right? So keep things simple at first. Don't try to reverse engineer the protocol for a proprietary hardware driver first. Blink an LED. Then blink an LED from the internet. I can't count how many times I've pulled my hair out first, and an oscilloscope second. Get a cheap multimeter and poke around the circuit. Arduino is great. But don't neglect old school logic from transistors and ICs.
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It's all bits, right? So keep things simple at first. Don't try to reverse engineer the protocol for a proprietary hardware driver first. Blink an LED. Then blink an LED from the internet. I can't count how many times I've pulled my hair out first, and an oscilloscope second. Get a cheap multimeter and poke around the circuit. Arduino is great. But don't neglect old school logic from transistors and ICs.