@foone not yet, I’ve just been noodling so far, but I’m gonna try and get it done very soon. It occurred to me to include as part of a completely different project of converting that old keyboard I like into one that can connect via Bluetooth and ideally represent itself as at least 3, but maybe an arbitrary number of separate keyboards, so I can connect it to all of my (BT supporting) computers and switch between them. Adding the Pi while I’m in there anyhow just seemed logical somehow. There’s plenty of room inside for the pi and the esp32 I’m planning to use for the Bluetooth part.