ESP3D/wiki/ESP8266-01.md
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# Wiring ESP01
* Use GPIO2 to ground to reset all settings in hard way - 2-6 sec after boot / not before!! Set GPIO2 to ground before boot change boot mode and go to special boot that do not reach FW. Currently boot take 10 sec - giving 8 seconds to connect GPIO2 to GND and do an hard recovery for settings
* Use GPIO0 to ground to be in update mode
![](https://github.com/luc-github/ESP3D/blob/master/images/HW/Wires.png)