# HELP! "Connection to light failed!" and no leds working

**URL:** <https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826>\
**Category:** Issues\
**Created:** [January 6, 2025, 6:26pm UTC](https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826 "2025-01-06T18:26:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![ChrisBy](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@ChrisBy](https://wled.discourse.group/u/ChrisBy)\
**Post date:** [January 6, 2025, 6:26pm UTC](https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826/1 "2025-01-06T18:26:59Z")

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Hi, right now I am using a BTF-LIGHTING WS2812B LED strip and a ESP 32 off of amazon. I just flashed the ESP with the online website and configured it with my wifi, but I keep getting this “Connection to light failed!” message at the bottom of my screen. I have looked around online about the problem, but everything I found just told me to ping it or re-flash it. I have done both multiple times but it still is having the same issue. I also tried using another identical board that is brand new.

I don’t know if this is related or a completely separate issue but none of my LEDs turn on except for the first one on the strip, very faintly, kind of green.

This is my first time dealing with wled so If anyone has a clue to what is causing this Please help!

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**Author:** ![srg74](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/srg74/32/3018_2.png) [@srg74](https://wled.discourse.group/u/srg74)\
**Post date:** [January 7, 2025, 12:20am UTC](https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826/2 "2025-01-07T00:20:10Z")

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It might cause bad Wi-Fi signal

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**Author:** ![dedehai](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/dedehai/32/7265_2.png) [@dedehai](https://wled.discourse.group/u/dedehai)\
**Post date:** [January 7, 2025, 4:22am UTC](https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826/3 "2025-01-07T04:22:42Z")

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there seems to be several things wrong with your hardware.  
first: try a better powersupply, dont run LEDs off USB (if you did). Use a decent phone charger to power the ESP with a decent, short cable.

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**Author:** ![ChrisBy](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@ChrisBy](https://wled.discourse.group/u/ChrisBy)\
**Post date:** [January 7, 2025, 5:44pm UTC](https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826/4 "2025-01-07T17:44:25Z")

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Thanks, this worked! I also realized that the GPIO Data Pin was set wrong in settings. Thats why my LEDs were not working.

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**Author:** ![ChrisBy](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@ChrisBy](https://wled.discourse.group/u/ChrisBy)\
**Post date:** [January 7, 2025, 5:45pm UTC](https://wled.discourse.group/t/help-connection-to-light-failed-and-no-leds-working/13826/5 "2025-01-07T17:45:34Z")

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I moved it closer to my AP for a while and it fixed it. Thanks!