If you're specifically following Rui's random nerd guides, you'll need an ESP-32. Clearly labeled pins above that match ESP-32 in tutorials. Reliable performance. I'll probably always use a development board for my stuff :) You use a USB connection for power, upload your code and look at things via serial. Be sure to bring your Raspberry PI 3 AC adapter and microUSB cable. long enough (6 feet :))
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