powercontrol

PC power/reset controller built around a Raspberry Pi, a relay board, and a Vue/Capacitor client.

It can also send serial key presses to the motherboard so the app can select the next GRUB entry before boot.

How It Works

The server is a small Express API running on the Raspberry Pi. It controls GPIO pins connected to a relay board for power and reset, and it can also write HID key presses to /dev/hidg0 to drive the GRUB menu before the PC starts.

The client is a Vue 3 + Capacitor app that discovers the server, stores connection details locally, and exposes actions such as power, reset, reboot, next-boot selection, and host online status.

In practice the hardware chain is:

motherboard front-panel pins <-> relay board <-> Raspberry Pi <-> client app

Quick start

1. Copy server/config.example.json to server/config.json.
2. Adjust the GPIO pins, host_ip, and token.
3. Start the server with cd server && npm install && npm run dev.
4. Start the client with cd client && npm install && npm run dev.

Android build

cd client
npm run android

Config Notes

• shutdownTime controls the delay used for reboot-style flows.
• menuTime controls when GRUB key presses are sent.
• nextboot is the boot-menu key sequence to send.
• Authentication is a single shared bearer token.

Pictures