Android-BluetoothMC Library

This library is use SSP(Bluetooth Serial Port) profile to develop application to communicate between Microcontroller and android device as the android device act as client . This library include send and receive functionality with some helper method and it has built in BluetoothDevices list

Feature

• It's very easy to use
• Apply material design
• Easy to integrate at any exciting project
• Built in BluetoothDevices list
• Listener for receive data from connection device
• Listeners for track the connection states and errors
• InputDataHelper to get the data well formatted from the Microcontroller

Use case

This library can use in many different applications like ,IOT ,RC car, Prostheses ...etc the ideas and options are endless make now your own idea true

Download

Gradle

implementation 'com.ahmedabdelmeged:bluetoothmc:1.1.0'

Getting started

• Declare BluetoothMC like this

BluetoothMC bluetoothmc = new BluetoothMC()

• Check if the bluetooth is now available

     //check if the bluetooth is now available
     if (!bluetoothMC.isBluetoothAvailable()) {
        //do any action if the bluetooth is not available
     }

• Check if the bluetooth is not enabled and you can enable it

     //check if the bluetooth enable or not and enable it if not
     else if (!bluetoothMC.isBluetoothEnabled()) {
         bluetoothMC.enableBluetooth();
     }

• If the bluetooth available and enabled now start the BluetoothDevices and connect

Intent intent = new Intent(MainActivity.this, BluetoothDevices.class);
startActivityForResult(intent, BluetoothStates.REQUEST_CONNECT_DEVICE);

In onActivityResult connect to the bluetooth device you choose

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == BluetoothStates.REQUEST_CONNECT_DEVICE) {
        if (resultCode == Activity.RESULT_OK) {
            bluetoothMC.connect(data);
        }
    }
}

• You can set the listener to keep track the connection process and show a dialog , toast or what ever you want check the sample app for more details

    //set listener to keep track for the connection states
    bluetoothMC.setOnBluetoothConnectionListener(new BluetoothMC.BluetoothConnectionListener() {
        @Override
        public void onDeviceConnecting() {
            //this method triggered during the connection processes
        }

        @Override
        public void onDeviceConnected() {
            //this method triggered if the connection success
        }

        @Override
        public void onDeviceDisconnected() {
            //this method triggered if the device disconnected
        }

        @Override
        public void onDeviceConnectionFailed() {
            //this method triggered if the connection failed
        }
    });

• Now you are to use the send and receive functionality :D to send data you the method send() like this

 bluetoothMC.send("o");

• For receiving data first set a data listener like this

//set listener for listen for the incoming data from the microcontroller
bluetoothMC.setOnDataReceivedListener(new BluetoothMC.onDataReceivedListener() {
    @Override
    public void onDataReceived(String data) {
    }
});

And you have to options for the incoming data you can receive it as string and formmat it as you want or you can use the InputDataHelper class . to use this method you Must send data in special way from the microcontroller as shown in the example Arduino-BluetoothMC.ino to be the data formatted in this way eg. we have two sensors the data will be in this way #sensor1Value+sensors2Value+~

And then in Declare a InputDataHelper as Global like this

InputDataHelper inputDataHelper = new InputDataHelper()

Now in the onDataReceived() call the setSensorsValues like this

sensors = inputDataHelper.setSensorsValues(data);

Which Sensor is an ArrayList<String> and know you extract the reads from the readings from the ArrayList and parse it as you want

• You can set listener to keep track of the errors after the connection like this

//set listener to keep track the communication errors
bluetoothMC.setOnBluetoothErrorsListener(new BluetoothMC.BluetoothErrorsListener() {
    @Override
    public void onSendingFailed() {
        //this method triggered if the app failed to send data
    }

    @Override
    public void onReceivingFailed() {
        //this method triggered if the app failed to receive data
    }

    @Override
    public void onDisconnectingFailed() {
        //this method triggered if the app failed to disconnect to the bluetooth device
    }

    @Override
    public void onCommunicationFailed() {
        //this method triggered if the app connect and unable to send and receive data
        //from the bluetooth device
    }
});

• You can also get the current adapter if you want to add some custom functionality like this

 BluetoothAdapter bluetoothAdapter = bluetoothMC.getBluetoothAdapter();

• After you finish your use it's a good practice to disconnect from the current connection just call

bluetoothMC.disconnect();

• Don't Forget to handle the activity life cycle for your app it's a better practice to lock the screen Orientation and keep it in one mode in the manifest like this android:screenOrientation="portrait" or the landscape mode

Tutorial

This a video in arabic to help you use the library Here

Microcontroller

I use Arduino as simple example for test the code but it work for the other microcontrollers and this the Arduino code Arduino-BluetoothMC.ino

What's next?

• Add more customization to the BluetoothDevice activity
• Add auto connect future
• Support for secure and insecure connection
• Ability to connect to android device

Sample App

You can use the sample app to help you get started

• BluetoothDevices activity

• MainActivity

Contributing

Contributions are open to improve the library just make a PR.