# Is it possible to send a signal to a relay?

**URL:** <https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503>\
**Category:** Questions\
**Created:** [September 1, 2021, 2:41pm UTC](https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503 "2021-09-01T14:41:37Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![MrArukado](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/mrarukado/32/1912_2.png) [@MrArukado](https://wled.discourse.group/u/MrArukado)\
**Post date:** [September 1, 2021, 2:41pm UTC](https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503/1 "2021-09-01T14:41:37Z")

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I wanted to trigger a relay from the wled app.  
more precisely when a preset in the playlist was executed.  
however, if that was not possible, just a command option to send to the relay.

in short: I need to activate a relay within the wled code so that I can use the same board without needing another  
(trigger relay from another pin on ESP8266 in the same wled code)

I’m very grateful, I love this project a lot, but I don’t understand much about programming.  
(Sorry for the bad English, I’m from Brazil)

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**Author:** ![tonyno](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/tonyno/32/242_2.png) [@tonyno](https://wled.discourse.group/u/tonyno)\
**Post date:** [September 1, 2021, 4:40pm UTC](https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503/2 "2021-09-01T16:40:30Z")

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Not following, but there is a usermod that supports multiple relays and control via HTTP/MQTT.

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**Author:** ![MrArukado](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/mrarukado/32/1912_2.png) [@MrArukado](https://wled.discourse.group/u/MrArukado)\
**Post date:** [September 1, 2021, 5:25pm UTC](https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503/3 "2021-09-01T17:25:17Z")

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thank you very much for the information, i will proceed.

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**Author:** ![Yov](https://avatars.discourse-cdn.com/v4/letter/y/8c91f0/32.png) [@Yov](https://wled.discourse.group/u/Yov)\
**Post date:** [April 22, 2022, 9:07am UTC](https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503/4 "2022-04-22T09:07:38Z")

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Hello, this would also interest me! i would like to build in WLeD next to a bright Lamp and have the option to chose between a GU10 LED spot or WLEd RGB strip. I am not home in the usermod’s, how do i implement this?

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**Author:** ![blazoncek](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/blazoncek/32/1886_2.png) [@blazoncek](https://wled.discourse.group/u/blazoncek)\
**Post date:** [April 22, 2022, 9:37am UTC](https://wled.discourse.group/t/is-it-possible-to-send-a-signal-to-a-relay/3503/5 "2022-04-22T09:37:44Z")

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Get a binary with compiled-in usermod.  
@srg74 has them in his Github repository.

> **[WLED-wemos-shield/resources/Firmware/WLED\_wemos\_shield/v0.13.2-a0 at master ·...](https://github.com/srg74/WLED-wemos-shield/tree/master/resources/Firmware/WLED_wemos_shield/v0.13.2-a0)**
>
> master/resources/Firmware/WLED\_wemos\_shield/v0.13.2-a0

> **[WLED-wemos-shield/resources/experimental/Firmware at master ·...](https://github.com/srg74/WLED-wemos-shield/tree/master/resources/experimental/Firmware)**
>
> master/resources/experimental/Firmware