WS2812B doesn’t light up

• I’ve got a 5V60A PSU and an 8266 controller which was connected to the +5V, D4 & GND pins
• in the 1st attempt, the strip has lit up for a few secs and the control panel was accessible at his point, but then the strip shuts down and I couldn’t managed to get it lighten up again, and the server of the control panel is also unaccessible
• in the following attempts, only two diodes has shown sign of live
• I’ve tried without the controller, only the +5V and GND channels were connected to the supply. And yet nothing happened.
• I even gave wago connectors a shot but nothing came to live.
Any suggestion to make it alive? Any response would be helpful. Thank you for your time!

D4 is not matching to the GPIO 4, Try select GPIO 2 on LED settings

Hi, thank you for your response. Do you mean to select GPIO 2 in the WLED setting panel? I could not access the setting panel, have you got any other option?

Be more specific about the issue.
I may then could find a solution!

They are addressable LEDs. They need data from the controller to tell them what color/brightness/when to light up. You likely won’t see them do anything w/out data.

Try just powering the controller (no LEDs) and see if you can access the WLED UI. If you can, then go to LED Preferences and set your first output to GPIO 2. Now connect your LEDs data to d4 (gpio2) and see if they work.

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Thank you for your response, I was able to access UI now — without the LED.
•The GPIO was already set-up to 2, so I don’t think this was the culprit.
• but as I solder the data wire to the D4 pin, the UI again becomes unaccessible
• and only 1 single LED diode lit up with blue color on the strip
Have you got any idea why is it? Thank you again

gpio 2 needs to be pulled high @ boot, else the controller won’t boot. Some boards seem to have an issue with that. You can add a 10k resistor between gpio 2 and 3.3v or you can try using gpio 1 for your LEDs instead and see if it works. gpio 1 is TX on your controller.