Map tilt sensors to MIDI

ArduinoNano33BLE/MidiBle-tilt/MidiBle-tilt.ino

@@ -0,0 +1,106 @@
+#include <Arduino_LSM9DS1.h>
+#include <BLEMIDI_Transport.h>
+
+//#include <hardware/BLEMIDI_ESP32_NimBLE.h>
+//#include <hardware/BLEMIDI_ESP32.h>
+//#include <hardware/BLEMIDI_nRF52.h>
+#include <hardware/BLEMIDI_ArduinoBLE.h>
+
+BLEMIDI_CREATE_DEFAULT_INSTANCE()
+
+unsigned long t0 = millis();
+bool isConnected = false;
+
+// accelerometer
+float x, y, z;
+float mx, my, mz; // midi mapped
+
+
+// -----------------------------------------------------------------------------
+// When BLE connected, LED will turn on (indication that connection was successful)
+// When receiving a NoteOn, LED will go out, on NoteOff, light comes back on.
+// This is an easy and conveniant way to show that the connection is alive and working. 
+// -----------------------------------------------------------------------------
+void setup()
+{
+  Serial.begin(115200);
+
+  Serial.println("MIDI-BLE TEST 1");
+  Serial.println("2022-03-02");
+
+  MIDI.begin();
+
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, LOW);
+
+  BLEMIDI.setHandleConnected([]() {
+    isConnected = true;
+    digitalWrite(LED_BUILTIN, HIGH);
+    Serial.println("MIDI-BLE CONNECTED");
+
+  });
+
+  BLEMIDI.setHandleDisconnected([]() {
+    isConnected = false;
+    digitalWrite(LED_BUILTIN, LOW);
+    Serial.println("MIDI-BLE DISCONNECTED");
+
+  });
+
+  MIDI.setHandleNoteOn([](byte channel, byte note, byte velocity) {
+    digitalWrite(LED_BUILTIN, LOW);
+  });
+  MIDI.setHandleNoteOff([](byte channel, byte note, byte velocity) {
+    digitalWrite(LED_BUILTIN, HIGH);
+  });
+
+  // accelerometer
+  if (!IMU.begin()) {
+    Serial.println("Failed to initialize IMU!");
+    while (1);
+  }
+  
+  Serial.print("Accelerometer sample rate = ");
+  Serial.print(IMU.accelerationSampleRate());
+  Serial.println(" Hz");
+  Serial.println();
+  Serial.println("Acceleration in G's");
+  Serial.println("X\tY\tZ");
+
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+void loop()
+{
+  if (IMU.accelerationAvailable()) {
+    IMU.readAcceleration(x, y, z);
+
+    mx = x * 64 + 64;
+    my = y * 64 + 64;
+    mz = max(10, abs(z) * 1000);
+
+    Serial.print(mx);
+    Serial.print('\t');
+    Serial.print(my);
+//    Serial.print(y);
+//    Serial.print('\t');
+//    Serial.println(z);
+    Serial.println();
+  }
+  
+  MIDI.read();
+
+  
+
+  if (isConnected && (millis() - t0) > mz)
+  {
+    t0 = millis();
+
+    MIDI.sendNoteOn (my, mx, 1); // note 60, velocity 100 on channel 1
+    Serial.println("ping");
+    delay(mz);
+    MIDI.sendNoteOff(my, mx, 1);
+  }
+}