ESP32 Forum

Posted: **Sat Feb 20, 2021 7:19 pm**

I have an ESP32 dev board wired up as a Domoticz sensor node. Apart from the WiFi library, it's 100% my own code. I don't control the onboard LED.

Lately I noticed the onboard LED is blinking in a specific pattern (long short short short short) even though my software is still running.

Does anyone have an idea what it might be?

Posted: **Mon Feb 22, 2021 2:13 am**

What board are you using? Any idea what 'the onboard LED' is connected to?

Posted: **Tue Feb 23, 2021 7:56 pm**

Some Chinese knock-off ("HW-628 V1.1") of the NodeMCU v3.

The LED is wired to Arduino pin D2 / Board pin 4 / ESP pin 22. When I digitalwrite this pin I can control the LED.

Posted: **Wed Feb 24, 2021 2:24 am**

Hm, that pin doesn't do anything specific. No clue then, sorry.

ESP32 Forum

Weird led blinking

Weird led blinking

Re: Weird led blinking

Re: Weird led blinking

Re: Weird led blinking