Olimex Support Forum

Microcontrollers => ESP32 => Topic started by: Stipulate2010 on June 03, 2025, 10:27:57 PM

Title: POE powered relays
Post by: Stipulate2010 on June 03, 2025, 10:27:57 PM
I am trying to put together a device that is POE powered with Relays. I was looking at the ESP32-POE and the MOD-IO2. My desire is to use it with ESPhome. I am not clear though that there is enough power to trigger the relays. If anyone has knowledge of this or a different combination of products I would appreciate it.

Thanks.
Title: Re: POE powered relays
Post by: LubOlimex on June 04, 2025, 08:12:13 AM
ESP32-POE can't power MOD-IO2 sufficiently - MOD-IO2 requires 12V DC and ESP32-POE doesn't have 12V DC output.

Consider using ESP32-POE2 instead which has 12V DC output:

https://www.olimex.com/Products/IoT/ESP32/ESP32-POE2/open-source-hardware

You would also need a cable like this between the 12V DC output and the power jack of MOD-IO2:

https://www.olimex.com/Products/Components/Cables/PWR-CABLE/

Title: Re: POE powered relays
Post by: Stipulate2010 on June 04, 2025, 04:16:02 PM
Exactly what I needed to know, thank you so much.