#26241

RHR KeyMate XIAO

CW to MIDI adapter

• #hardware
• #creation

Based on the Seeed Studio XIAO RP2040, the KeyMate acts as USB MIDI interface between Morse code keys and transceivers.

In client mode, it precisely timestamps every key-down and key-up transition, emitting MIDI events in the MoMIDI spec.

In server mode, it use an optoisolator to drive the key input to a radio, accurately reconstructing the timestamped key signals.