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
A Raspberry Pi Mouse is also supported if plugged in, eg: https://shop.pimoroni.com/products/raspberry-pi-mouse?variant=29390982119507
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.
Add dtoverlay=dwc2
to /boot/config.txt
Reboot!
sudo modprobe libcomposite
wget https://github.com/Gadgetoid/pi400kb/blob/main/pi400kb?raw=true
chmod +x pi400kb
sudo ./pi400kb
✨ YOUR PI 400 IS NOW A FREAKING KEYBOARD & MOUSE FOR YOUR PC WHAAAAT!? ✨
Your keyboard input will be detached from your Pi while it's forwarded to your host computer.
Press Ctrl + Raspberry
to grab/release your keyboard and mouse, switching between local use and USB.
Press Ctrl + Shift + Raspberry
(on the grabbed keyboard) to exit.
Pi 400 KB supports the official Raspberry Pi Mouse VID:PID = 093a:2510 by default, but other mice should work.
sudo cp pi400kb /usr/sbin/pi400kb
sudo systemctl edit --force --full pi400kb.service
Add the contents of the pi400kb.service
file.
Start the service and check its status:
sudo systemctl start pi400kb.service
sudo systemctl status pi400kb.service
Enable start on boot if it's okay:
sudo systemctl enable pi400kb.service
sudo apt install libconfig-dev
git clone https://github.com/Gadgetoid/pi400kb
cd pi400kb
git submodule update --init
mkdir build
cd build
cmake ..
make
CMake accepts the following build arguments to customise the VID/PID and device path for the mouse/keyboard:
KEYBOARD_VID
- Keyboard Vendor ID, default: 0x04d9KEYBOARD_PID
- Keyboard Product ID, default: 0x0007KEYBOARD_DEV
- Keyboard device path, default: /dev/input/by-id/usb-_Raspberry_Pi_Internal_Keyboard-event-kbdMOUSE_VID
- Mouse Vendor ID, default: 0x093aMOUSE_PID
- Mouse Product ID, default: 0x2510MOUSE_DEV
- Mouse device path, default: /dev/input/by-id/usb-PixArt_USB_Optical_Mouse-event-mouse
Supply these arguments when configuring with CMake, eg:
cmake .. -DMOUSE_DEV="/dev/input/by-id/usb-EndGameGear_XM1_Gaming_Mouse_0000000000000000-event-mouse" -DMOUSE_VID=0x3367 -DMOUSE_PID=0x1903