Feature Request: Flash LED on MIDI Input

[TheBatmosphere]

To confirm MIDI reception, the option to have an onboard LED flash would be helpful. Another idea would be to have a pin go high or low so we could connect an external LED.

[TheBatmosphere]

A workaround is to connect an LED between the MIDI pins, with the cathode going to MIDI In. It will flash when receiving input on that pin. A flash on USB MIDI input would still be useful.

[solipsvs]

+1

for debugging this is a good idea