# How to configure H803WF module for DMX output

**URL:** <https://wled.discourse.group/t/how-to-configure-h803wf-module-for-dmx-output/3477>\
**Category:** Uncategorized\
**Created:** [August 29, 2021, 2:15pm UTC](https://wled.discourse.group/t/how-to-configure-h803wf-module-for-dmx-output/3477 "2021-08-29T14:15:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![andorian](https://avatars.discourse-cdn.com/v4/letter/a/46a35a/32.png) [@andorian](https://wled.discourse.group/u/andorian)\
**Post date:** [August 29, 2021, 2:15pm UTC](https://wled.discourse.group/t/how-to-configure-h803wf-module-for-dmx-output/3477/1 "2021-08-29T14:15:29Z")

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Anyone here experience configuraing H803WF module for DMX out ?  
I compiled WLED with DMX enabled, neasure the output with a scope, but initially the output seems only to be affected by settings on the LED preferences page, not the DMX page. I do not have a schematic for the H803, but I asume the output for DMX = 1 ( Same pin as used for usart TX during flash)

After power up I see a pulse on the output ( repetition ~ 25ms, width ~1.2ms)  
This pulse disappears when I change proxy universe to a value \> 0 ( what should proxy unverse be ?  
(I just want MQTT → DMX)

Anyone with H803 experience ?

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**Author:** ![huggy-d1](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/huggy-d1/32/51_2.png) [@huggy-d1](https://wled.discourse.group/u/huggy-d1)\
**Post date:** [August 31, 2021, 6:46pm UTC](https://wled.discourse.group/t/how-to-configure-h803wf-module-for-dmx-output/3477/2 "2021-08-31T18:46:16Z")

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The H803 is designed (before WLED firmware is installed) to accept ArtNet / DMX input from an ArtNet or a DMX controller.

WLED firmware is designed the very same way. It is designed to accept DMX or ArtNet control from an external source.

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**Author:** ![andorian](https://avatars.discourse-cdn.com/v4/letter/a/46a35a/32.png) [@andorian](https://wled.discourse.group/u/andorian)\
**Post date:** [September 1, 2021, 8:01pm UTC](https://wled.discourse.group/t/how-to-configure-h803wf-module-for-dmx-output/3477/3 "2021-09-01T20:01:20Z")

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What I understand, is that it is also possible with WLED to use MQTT to control DMX lights. This is what I try to accomplish.