ESP8266 Community Forum

Hi. I want to use my ESP8266 module with my Arduino Uno.

I've read that I need an external 3.3V power supply because the Arduino current is not enough.

The issue is: the esp8266 turn on only when I power it with the Arduino.

When I do:

GND esp —> GND arduino et VCC et CH-PD —> 3.3V arduino

The ESP led is turned on.

But when I do:

GND esp —-> minus external power supply 3.3v et VCC et CH-PD esp —-> plus external power supply 3.3V

Nothing happen, the led keep turned off.
The external power supply is: https://www.ebay.com/itm/MB102-Breadboard-Power-Supply-Module-3-3V-5V-For-Arduino-Solderless-Breadboard-/252572234136?hash=item3ace7a7198:g:AxEAAOSw9N1Vk75H

I'v tried to cross plus and minus but nothing change.


Why ( The power supply works, I tested it ) ?

Thanks