This page connects to an MQTT broker, and uses WebMIDI to connect to any MIDI inputs or outputs on your system. It will auto-detect new MIDI devices as they are connected or disconnected from your system.
When a MIDI message is received, it is converted to an MQTT message on a topic called Midi, and sent out to the MQTT broker. Likewise, when an MQTT message is received, it is converted to a MIDI message and sent to the selected MIDI output device.
You can also generate MIDI messages (and MQTT messages) by typing the keys below.
The Local Echo checkbox selects whether the MIDI output takes messages from local sources, or just from MQTT.