I'm trying out the midi-lib with hairless-serialmidi for monitoring. midi-lib seems to be simple and nice, but somehow hairless-serialmidi shows me warnings which i do not understand..
but somehow hairless-serialmidi shows me warnings which i do not understand.
So you are keeping them a secret in case we can understand them?
That code needs another delay after the note off otherwise the code will immediately send a note on again and it will be as if the note off never happened.
What button?
Their is no button in the sketch you posted.
"it says" - What is it? Where are these warnings appearing?
They both indicate that you are sending incomplete MIDI messages, but without seeing the code that is generating them we can't tell where the error is. You might have even failed to set the baud rate of the sender to match the baud rate that hairless is expecting.