USB-C power port is used to connect to power source and keyboard input. On the other hand, shortage of power supply makes Pi 400 unstable. Further, USB-C cannot be said it is common enough for keyboard terminal.

ELECOM makes a splitter that PD via USB-C and data link via USB-A: https://www.elecom.co.jp/products/MPA-CAPDBK.html

For mouse following works: https://www.elecom.co.jp/products/M-Y8UBPN.html

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.

• YASetup
• Modifications

--Original--

• Quickstart (Ish)
  • Mouse Support
• Building & Contributing
  • Building
  • Custom Mouse/Keyboard Devices

sudo apt install libconfig-dev git cmake
git clone https://github.com/Gadgetoid/pi400kb
cd pi400kb
git submodule update --init
mkdir build
cd build
cmake ..
make
chmod +x pi400kb
ln -s ./pi400kb /usr/sbin/pi400kbl
sudo systemctl edit --force --full pi400kb.service

It is need to add dtoverlay=dwc2 to /boot/config.txt. Then reboot. On the terminal, type sudo modprobe libcomposite.

cd ..
mv pi400kb.service /etc/systemd/system/pi400kb.service
mv modprobe.service /etc/systemd/system/modprobe.service
sudo systemctl enable pi400kb.service
sudo systemctl enable modprobe.service

Or use /etc/modules-load.d/modules.conf instead of enabling.

However, it is recommended to test before enabling services by following commands.

sudo systemctl start pi400kb.service
sudo systemctl start modprobe.service
sudo systemctl status pi400kb.service
sudo systemctl status modprobe.service

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. (This exit means break of detection loop)

• improve error handling #25 DeeNewcum:main
• Pass through all the devices #41 Daft-Freak:all-the-devices
• Adds the modprobe.service on startup #33 tigertank591:main

• Modify the key to grab/release keyboard and mouse from the host #27 Shuya4
  • DeeNewcum/pi400kb

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.

• Quickstart (Ish)
  • Mouse Support
• Building & Contributing
  • Building
  • Custom Mouse/Keyboard Devices

Add dtoverlay=dwc2 to /boot/config.txt

Reboot!

sudo modprobe libcomposite

Grab the latest pi400kb for your system from releases: https://github.com/Gadgetoid/pi400kb/releases

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 cmake
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: 0x04d9
• KEYBOARD_PID - Keyboard Product ID, default: 0x0007
• KEYBOARD_DEV - Keyboard device path, default: /dev/input/by-id/usb-_Raspberry_Pi_Internal_Keyboard-event-kbd
• MOUSE_VID - Mouse Vendor ID, default: 0x093a
• MOUSE_PID - Mouse Product ID, default: 0x2510
• MOUSE_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