Anybody come across a pedal/switch that would output sustain MIDI signal? Or would Arduino's MIDIUSB work for a DIY version? I have a couple of keyboards (Roli Seaboard block and Roland JD-Xi) without sustain pedal inputs and would like to use a sustain pedal with them

edit: found one - https://webaudiotech.com/2017/02/20/a-piano-sustain-pedal-to...