This is a wonderful hack!
But — using a Raspberry Pi and Linux is overkill for this. It introduces huge unnecessary complexity. A simpler approach would be to go with Zephyr and a small microcontroller (ARM Cortex M4).
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Why? My friend needed a way to use his Bluetooth mouse and keyboard on a PC with Bluetooth disabled due to policy restrictions. This tool acts as a bridge, relaying Bluetooth input over USB. It also lets you use Bluetooth peripherals with older devices that only support USB input.
Tech: Written in Go, optimized for Raspberry Pi Zero W.
I love HN’s community and often lurk here—I’m hoping this project is useful or at least sparks some interesting discussions. Feedback and contributions are welcome!