Back in 2019 I learned about and testing using a Raspberry Pi as an accessory to an iPad. The idea is useful for people who want a local Linux terminal on an iPad rather than making a remote connection to one on a server. People who use terminal apps like vi or emacs and developer tools are the ones who find this the most useful.

The process involves connecting a Raspberry Pi to an iPad via USB-C cable, and software on the Raspberry Pi make the USB-C connection function like an ethernet network connection. You get an IP address that you can use to login to the Pi using SSH, at which point then have access to all the tools available in the Raspberry Pi OS. If a VNC Server is running on the Pi you can even get a desktop connect using a VNC Viewer.

The instructions for setting this all up,, in which is called USB Gadget Mode, are not daunting but take a little bit of work. Today I learned that the functionality for USB Gadget Mode is now available directly in the Raspberry PI OS.