cs-midi-docs/docs/examples/01-output/05-note-button-latched.md

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# NoteButtonLatched
First press sends Note On, second press sends Note Off.
```cpp
#include "pico/stdlib.h"
#include "pico/cyw43_arch.h"
#include <cs_midi.h>
using namespace cs;
BluetoothMIDI_Interface midi;
NoteButtonLatched button {
5,
{MIDI_Notes::C[4], Channel_1},
};
int main() {
stdio_init_all();
if (cyw43_arch_init()) return 1;
Control_Surface.begin();
while (true) {
Control_Surface.loop();
sleep_ms(1);
}
}
```