Raspberry Pi 400 as a USB HID Keyboard
Hook your Pi 400 up to your PC somehow, using a USB Type-C cable into the power port. Anker make good ones- I used a 3m white one for my tests.
Our USB-C to USB-A is great if you're using a USB-A port (but make sure it's a high power one): https://shop.pimoroni.com/products/usb-c-to-usb-a-cable-1m-black
This project started out life as a gist - https://gist.github.com/Gadgetoid/5a8ceb714de8e630059d30612503653f
Thank you to all the people who dropped by with kind words, suggestions and improvements.
sudo modprobe libcomposite
chmod +x pi400kb
YOUR PI 400 IS NOW A FREAKING KEYBOARD FOR YOUR PC WHAAAAT!?
Your keyboard input will be detached from your Pi while it's forwarded to your host computer.
Ctrl + Raspberry to exit and restore your keyboard on the Pi.
Building & Contributing
sudo apt install libconfig-dev git clone https://github.com/Gadgetoid/pi400kb cd pi400kb git submodule update --init mkdir build cd build cmake .. make