u/ButtScratcher9

Hey all, hoping for some fresh eyes on this one.
I’m using an ESP32-C6 to remotely trigger my PC’s power button instead of the case power button.

The signal path is:
ESP32-C6 GPIO pin -> PC817 4 channel optocoupler board (only using 1 of the 4 channels) -> motherboard PWR header

So it’s 4 wires total on that one channel: two on the input side going to the ESP32 GPIO 4 and ground, and two on the output side going to the two PWR pins on the motherboard.

The idea is the ESP32 pulses the GPIO briefly, which switches the optocoupler’s output transistor on for that same brief moment, which closes the PWR circuit just like a normal button press would.

Then I used Esphome in Home Assistant to write the firmware (which seems to be fine, showing the device connected and popped up in integration and added correctly)

esphome:
  name: pc-power-control
  friendly_name: PC Power Control
  area: Living Room

esp32:
  board: esp32-c6-devkitc-1
  framework:
    type: esp-idf

api:
  encryption:
    key: !secret pc_power_api_key

ota:
  platform: esphome
  password: !secret pc_power_ota_password

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  power_save_mode: NONE


  ap:
    ssid: "PC-Power-Control Fallback"
    password: !secret pc_power_fallback_password

logger:
  level: INFO

switch:
  - platform: gpio
    pin: GPIO4
    id: power_button_relay
    internal: true 

button:
  - platform: template
    name: "PC Power Button"
    icon: "mdi:power"
    on_press:
      - switch.turn_on: power_button_relay
      - delay: 300ms
      - switch.turn_off: power_button_relay

However, i believe the problem is on hardware level.

When I plug in the PSU cable, the PC powers on for a second or two, then shuts itself off. Clicking the power on button in home assistant doesn’t do anything. Nothing in the logs as well.

All the wires are properly screwed into the terminal blocks on the optocoupler board, nothing loose.

Appreciate any help, I’m still learning this thing

You see the cables covers, my asia horse app treats them as one strip so i don’t get the separate lines effect. How can I get it?
I have the asiahorse aurora pro cable covers connected to the Umbra hub, umbra hub is connected to the USB header.

Each cable cover is plugged in separate argb port in the hub

/s

It's just an action figure made to look like he's helping. I use the case's GPU holder.