# Relay module doesn't work on esp32

**URL:** <https://forum.arduino.cc/t/relay-module-doesnt-work-on-esp32/1346023>\
**Category:** General Guidance\
**Created:** [January 23, 2025, 1:44pm UTC](https://forum.arduino.cc/t/relay-module-doesnt-work-on-esp32/1346023 "2025-01-23T13:44:40Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![ZX80](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/zx80/32/643687_2.png) [@ZX80](https://forum.arduino.cc/u/ZX80)\
**Post date:** [January 23, 2025, 2:33pm UTC](https://forum.arduino.cc/t/relay-module-doesnt-work-on-esp32/1346023/19 "2025-01-23T14:33:44Z")

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> [@Problems with ESP32 and relay module](https://forum.arduino.cc/t/problems-with-esp32-and-relay-module/991268):
>
> Hello, I am having problems activating a relay from the ESP32 WROOM 32d module, the signal reaches the relay card, but it does not activate, I tried several relay cards, and it does not activate, I also tried connecting the signal to a led, together with the negative, and the led if it works. I also tried replacing the ESP32 with another one, and that doesn't work either. What could be wrong with my connection or code?, thanks Code: //This example code is in the Public Domain (or CC0 license…

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