Arduino to MIDI

## Setup

1. Install MIDIUSB library https://docs.arduino.cc/libraries/midiusb/

2. Add the MIDIUSB.h Library: Go to Tools < Manage Libraries...

3. Search for "MIDIUSB" by Gary Grewal

4. Install the latest version

5. Select your board: Tools > Board > Arduino Leonardo (or Pro Micro)

🎛️🎚️ Potentiometers / Sliders

### What you need:

- 1 potentiometer or slider

- 3 wires

### How to connect:

```

Potentiometer:

├─ Left pin / GND   → GND

├─ Middle pin / Signal → A0 (or A1, A2, A3...)

└─ Right pin / VCC / Power  → 5V

#include <MIDIUSB.h>

int lastValue = 0;

void setup() {
  pinMode(A0, INPUT);  // ← Change A0 to your pin
}

void loop() {
  int value = analogRead(A0) / 8;  // ← Change A0 to match setup

  if (value != lastValue) {
    midiEventPacket_t event = {0x0B, 0xB0, 1, value};
    //                                      ↑ ← CC number
    MidiUSB.sendMIDI(event);
    MidiUSB.flush();
    lastValue = value;
  }

  delay(10);
}

## 🔘 Note  button

### What you need

- 1 push button

- 2 wires

### How to connect

```

Button:

├─ One side  → Pin 2 (or 3, 4, 5...)

└─ Other side → GND

```

#include <MIDIUSB.h>

int lastState = HIGH;

void setup() {
  pinMode(2, INPUT_PULLUP);  // ← Change 2 to your pin
}

void loop() {
  int state = digitalRead(2);  // ← Change 2 to match setup

  if (state != lastState) {
    if (state == LOW) {
      // Button pressed
      midiEventPacket_t noteOn = {0x09, 0x90, 60, 127};
      //                                       ↑   ↑
      //                                    note velocity
      MidiUSB.sendMIDI(noteOn);
    } else {
      // Button released
      midiEventPacket_t noteOff = {0x08, 0x80, 60, 0};
      //                                        ↑
      //                                      note
      MidiUSB.sendMIDI(noteOff);
    }
    MidiUSB.flush();
    lastState = state;
  }

  delay(10);
}