I hacked a small app for Android's Termux to use any USB keyboard (or bluetooth or android's default keyboard) as a remote OSC controller with 100~ buttons. It sends "/key/pressed/<char>" to any IP and port over wifi. Cannot be installed as an app, it only runs in Termux, which is enough for me. Maybe it's enough for someone else, so here it goes. https://codeberg.org/loopier/osc-monster If you want to do the same from the computer, I would suggest you use MIDIMonster instead; its a proper thing and works great.