Weird led blinking

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mark.jeronimus
Posts: 6
Joined: Sun Jan 31, 2021 10:11 am

Weird led blinking

Postby mark.jeronimus » 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?
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ESP_Sprite
Posts: 9759
Joined: Thu Nov 26, 2015 4:08 am

Re: Weird led blinking

Postby ESP_Sprite » Mon Feb 22, 2021 2:13 am

What board are you using? Any idea what 'the onboard LED' is connected to?
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mark.jeronimus
Posts: 6
Joined: Sun Jan 31, 2021 10:11 am

Re: Weird led blinking

Postby mark.jeronimus » 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.
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ESP_Sprite
Posts: 9759
Joined: Thu Nov 26, 2015 4:08 am

Re: Weird led blinking

Postby ESP_Sprite » Wed Feb 24, 2021 2:24 am

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