ESP8266 Community Forum

Board: Lolin NodeMcu V3

Steps:
1.- Compile project (Eclispe)
2.- Flash the board (ESP8266Flasher)
3.- Reset the board (with onboard reset switch and without unplugging the USB cord)
4.- The project runs just fine (blinking led, playing tune on buzzer,etc.)
5.- Unplug the USB cord -> project keeps running fine
6.- Reset the board (with onboard reset switch. Remember! USB cord already disconnected in step 5) -> project doesn't start. Even cutting the power off and bringing it back on doesn't help.

Is this behaviour expected? Any ideas?

Thanks!

Best regards

I've just realized the problem:

- I was powering the board with a 3.3v power source connected to VIn pin (should be connected to 3V pin).

I still can't tell why the board keep running when the power source is misconnected and I take off the USB cord...

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