I'm looking for some guidance on setting up a microcontroller to monitor the voltage from my PC's power LED pins on the motherboard. I've dabbled a bit in analog projects but I'm still a beginner. I believe the LED pins output either 5V or 3.3V, but I plan to test that myself. There are two pins: one for positive and one for negative. Ideally, I'd like this microcontroller to communicate wirelessly, and it would be great if I could send the data directly to Home Assistant. I'm not sure which microcontroller would work best for this task, or how to wire it up. Additionally, while I have no prior experience with programming for this, I'm curious if it's even achievable. Any advice would be appreciated!
1 Answer
If you want something simple for Home Assistant, I'd recommend an ESP32. They only cost a few bucks and integrate easily with ESPHome. Keep in mind the ESP32 uses 3.3V, so if your LED pins output 5V, you might need to use a voltage divider.
Thanks for the tip!