OpenEarable Flutter

This Dart package provides functionality for interacting with OpenEarable devices. It enables you to communicate with OpenEarable devices, control LED colors, control audio, and access raw sensor data.

Try it online, provided your browser supports Web Bluetooth.

 
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Permissions

For your app to be able to use UniversalBLE in this package, you need to grant the following permissions:

Android

You need to add the following permissions to your AndroidManifest.xml file:

<!-- flutter_reactive_ble permissions -->
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

<!-- location permissions -->
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION"/>

If you use location services in your app, remove android:maxSdkVersion="30" from the location permission tags

iOS / macOS

For iOS it is required you add the following entries to the Info.plist file of your app. It is not allowed to access Core BLuetooth without this. See our example app on how to implement this. For more indepth details: Blog post on iOS bluetooth permissions

iOS 13 and higher

• NSBluetoothAlwaysUsageDescription

iOS 12 and lower

• NSBluetoothPeripheralUsageDescription

For macOS, add the Bluetooth capability to the macOS app from Xcode.

Getting Started

To get started with the OpenEarable Flutter package, follow these steps:

1. Installation: Add the package to your flutter project: \

flutter pub add open_earable_flutter

Alternatively, you can follow the instructions on pub.dev

2. Import the package:

import 'package:open_earable_flutter/open_earable_flutter.dart';

3. Initialize OpenEarable

final openEarable = OpenEarable();

4. Connect to Earable Device

openEarable.bleManager.startScan();

// Listen for discovered devices
openEarable.bleManager.scanStream.listen((device) {
  // Handle discovered device
});

// Connect to a device
openEarable.bleManager.connectToDevice(device);

Usage

• Read device information after connecting to a device:

   String? deviceName = openEarable.deviceName;
   String? deviceIdentifier = openEarable.deviceIdentifier;
   String? deviceFirmwareVersion = openEarable.deviceFirmwareVersion;

• Sensors:
  • Configuration of Sensors:

     var config  = OpenEarableSensorConfig(sensorId: 0, samplingRate: 30, latency: 0);
     openEarable.sensorManager.writeSensorConfig(config);

    Please refer to open-earable for a documentation on all possible sensor configurations
  • Subscribing to sensor data with sensor id 0

     openEarable.sensorManager.subscribeToSensorData(0).listen((data) {
     // Handle sensor data
     });

    Sensor data is returned as a dictionary:

     {
     	"sensorId": 0,
     	"timestamp": 163538,
     	"sensorName": "ACC_GYRO_MAG",
     	"ACC": {
     		"units": {"X": "g", "Y": "g", "Z": "g"},
     		"X": 5.255882263183594,
     		"Y": -2.622856855392456,
     		"Z": 8.134146690368652
     	},
     	"GYRO": {
     		"units": {"X": "dps", "Y": "dps", "Z": "dps"},
     		"X": 0.007621999830007553,
     		"Y": -0.030487999320030212,
     		"Z": -0.015243999660015106
     	},
     	"MAG": {
     		"units": {"X": "uT", "Y": "uT", "Z": "uT"},
     		"X": -566.1000366210938,
     		"Y": -95.70000457763672,
     		"Z": -117.30000305175781
     	}
     	"EULER": {
     		"units": {"ROLL": "rad", "PITCH": "rad", "YAW": "rad"},
     		"ROLL": 0.8741,
     		"PITCH": -0.2417,
     		"YAW": 1.2913
     	}
     }

  • Battery Level percentage:

     Stream batteryLevelStream = openEarable.sensorManager.getBatteryLevelStream();

  • Button State:

     Stream buttonStateStream = openEarable.sensorManager.getButtonStateStream();

    • contains the following button states as integers:
    • 0: Idle
    • 1: Pressed
    • 2: Held
• Control built-in LED:

   openEarable.rgbLed.writeLedColor(r: 0, g: 255, b: 0);

• Control audio player:
  • Play WAV files

    openEarable.audioPlayer.wavFile("audio.wav");
    openEarable.audioPlayer.setState(AudioPlayerState.start);

    • name: filename of audio file stored on earable
  • Play Frequency:

    int waveForm = 1;
    double frequency = 500.0;
    double loudness = 0.5;
    openEarable.audioPlayer.frequency(waveForm, frequency, loudness);
    openEarable.audioPlayer.setState(AudioPlayerState.start);

    • state: WavAudioPlayerState
      • frequency: double
      • waveForm: int
      • 0: sine
      • 1: triangle
      • 2: square
      • 3: sawtooth
      • loudness: double between 0.0 and 1.0
    • Play Jingle:

       int jingleId = 1;
       openEarable.audioPlayer.jingle(jingleId);
       openEarable.audioPlayer.setState(AudioPlayerState.start);

      • jingleId: id of jingle stored on earable
      • 0: 'IDLE'
      • 1: 'NOTIFICATION'
      • 2: 'SUCCESS'
      • 3: 'ERROR'
      • 4: 'ALARM'
      • 5: 'PING'
      • 6: 'OPEN'
      • 7: 'CLOSE'
      • 8: 'CLICK'