Inverting buttons that are normally closed

[MoSaye]

hello there, I have a few touch sensors that are normally closed so when they are touched they send a MIDI note off and when released they send a MIDI note on, how do I invert them for certain buttons because I already have some other mechanical switches that are working fine, I saw in the documentation something about invert but there are no examples so I don't know how to use it, can anyone help?

[tttapa]

See NoteButton::invert().

[tttapa]

If you start from the NoteButton example, you can simply add button.invert(); to your setup() function.

[MoSaye]

thanks a lot for your help it worked even with multiplexer i just dropped the address of the switch and it worked, and i would like to thank you for the great work that you are doing here.

[rommil67]

How to do this for many (35) such buttons in Arduino Mega? code snippet (I use old examples):

NoteButton buttons[] = {

// If you want to set the channel specifically, you can use:
// for UNO , nano, mega
{7, {note(C, 2), CHANNEL_3}},
{2, {note(Db, 2), CHANNEL_3}},

[tttapa]

Simply loop over all buttons:

for (auto &b : buttons)
  b.invert();

[rommil67]

Thanx.