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That's because USB runs on 5V, but the ESP8266 only takes 3.3V. To share power between both chips, you need a voltage regulator that takes 5V and turns it into 3.3V. ![]() Ideally, you want the Atmega32u4 to power the ESP8266, so it can run on one USB connection, instead of having to always plug in both. ‼️ DIGISPARK or other ATTINY85 based development boards, are NOT supported! ‼️ ESP8266 Development BoardsĪ map of pins that need to be connected. The Atmega32u4 to act as USB keyboard, and the ESP8266 for WiFi. ⚠️ Keep in mind that you will need both microcontrollers! You can use any Atmega32u4 or ESP8266 based development board,īut if you have no idea where to start, here's a list. If you wish to solder everything together into a small gadget, ![]() In this case, you'd also need a breadboard with a couple of jumper wires. If you're a beginner, it's recommended you wire everything together on a breadboard first! To flash the microcontrollers you need a computer and USB cable.
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