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ESP3D/wiki/ESP8266-12E-F.md
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Wiring ESP12E/F

ESP need 3.3v, it is not 5v tolerant, if printer board use more than 3.3V like 5V on ramps.
wiring diagram

you can also use Logic LevelConverter Bi-Directional

picture

In order to flash some ESP12E/F boards via their UART interface, the following pins need to be connected:

  • VCC to GPIO2
  • GND to GPIO0

This has been tested with ESP-12-E boards labeled "ESP8266 For ESP3D FYSETC.COM"

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