# 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](https://raw.githubusercontent.com/wiki/luc-github/ESP3D/images/HW/WiresESP12E.png)

you can also use Logic LevelConverter Bi-Directional

![picture](https://raw.githubusercontent.com/wiki/luc-github/ESP3D/images/HW/logic.PNG)

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"