ESP8266 without breadboard and USB connection. Small and efficient, but limited to 3.3V. If you're going from a big device to this one, be sure to do your research as there are differences. Works great with this programmer (you can get it cheaper outside of Revain): https://www.amazon.com/Wishiot-ESP8266-Burning-Development-Programer/dp/B08BXMGVNM/
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