Using Arduino HID on non-v0 platforms is useful if you need a simple and primitive keyboard emulation device. For example, when used with a hardware KVM switch. You can use the firmware to emulate a USB keyboard and mouse, or for the PS/2 keyboard only.
## USB keyboard & mouse
* Build and connect HID according to the [diagram](../README.md#setting-up-the-v0) (the bottom part with transistor, level-shifter and Arduino).
* Switch to RW-mode using command `rw`.
* Add these lines to `/etc/kvmd/override.yaml` (remove `{}` in the file before):
Both of these problems will be solved one way or another in the future and the two different firmware versions will be combined into one universal one.
To select the PS/2 firmware, you need to follow the instructions for USB, but with one exception. At the device firmware stage instead of commands:
Next, you need to connect the Arduino pins to the female PS/2 port of your motherboard. Choose the purple port. If your motherboard only have one port, it's probably universal and can be used either for the keyboard or for the mouse. Most likely, it is painted in two colors: green and purple. You can use it either.