# Eps32 pin out

**URL:** <https://wled.discourse.group/t/eps32-pin-out/6537>\
**Category:** Issues\
**Created:** [November 28, 2022, 10:43pm UTC](https://wled.discourse.group/t/eps32-pin-out/6537 "2022-11-28T22:43:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Parzival](https://avatars.discourse-cdn.com/v4/letter/p/ed8c4c/32.png) [@Parzival](https://wled.discourse.group/u/Parzival)\
**Post date:** [November 28, 2022, 10:43pm UTC](https://wled.discourse.group/t/eps32-pin-out/6537/1 "2022-11-28T22:43:36Z")

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I use Eps 32 and I want to check a lot of leds and I give GPIO (18,19,21 ) data if a led works uncontrollably what should I do as the video appears  
video link : [iCloud](https://share.icloud.com/photos/0f1wfWxoM7Umcc20XWWfcs8Rw)  
Thanks in advance for your answers

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**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [November 29, 2022, 2:49am UTC](https://wled.discourse.group/t/eps32-pin-out/6537/2 "2022-11-29T02:49:11Z")

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That looks like a ground issue. Do you have all the grounds tied together? Esp, strips, power supply. All need common ground.

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**Author:** ![Parzival](https://avatars.discourse-cdn.com/v4/letter/p/ed8c4c/32.png) [@Parzival](https://wled.discourse.group/u/Parzival)\
**Post date:** [November 29, 2022, 4:30am UTC](https://wled.discourse.group/t/eps32-pin-out/6537/3 "2022-11-29T04:30:44Z")

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I did as you said, it happened, only the led explodes 3 colors, the video is as it looks video link [iCloud](https://share.icloud.com/photos/024S3re5lPjk7-rXWqPLxL8Yw)

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**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [November 29, 2022, 8:52am UTC](https://wled.discourse.group/t/eps32-pin-out/6537/4 "2022-11-29T08:52:42Z")

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Now it looks like the Esp is too far from the first LED and the data signal is not strong enough. You should add a level shifter to boost the data signal from 3.3v to 5v [Compatible Hardware - WLED Project](https://kno.wled.ge/basics/compatible-hardware/#levelshifters) SN74AHCT125N is a good choice. Or you could try moving the Esp closer to the first LED.