# **Android Studio**
## Implement Bluetooth and Mqtt protocol
---

### Classic Bluetooth
#### The Information of the Smart Insole

public static final String SerialPortUUIDL="0000dfb1-0000-1000-8000-00805f9b34fb";
public static final String SerialPortUUIDR="0000dfb1-0000-1000-8000-00805f9b34fb";
public static final String SerialPortUUIDV="0000dfb1-0000-1000-8000-00805f9b34fb";
public static final String CommandUUIDL="0000dfb2-0000-1000-8000-00805f9b34fb";
public static final String CommandUUIDR="0000dfb2-0000-1000-8000-00805f9b34fb";
public static final String CommandUUIDV="0000dfb2-0000-1000-8000-00805f9b34fb";
public static final String ModelNumberStringUUIDL="00002a24-0000-1000-8000-00805f9b34fb";
public static final String ModelNumberStringUUIDR="00002a24-0000-1000-8000-00805f9b34fb";
public static final String ModelNumberStringUUIDV="00002a24-0000-1000-8000-00805f9b34fb";

#### Bluetooth Manager
:::success

private BluetoothManager mBluetoothManagerL;
private BluetoothManager mBluetoothManagerR;

:::

#### Bluetooth Adapter
:::success

private BluetoothAdapter mBluetoothAdapterL;
private BluetoothAdapter mBluetoothAdapterR;

:::

#### What is the device using below?
:::warning

private BluetoothManager mBluetoothManagerV;
private BluetoothAdapter mBluetoothAdapterV;

:::

#### Initialize Bluetooth and check if the phone supports Bluetooth

public boolean initializeR() {
    // For API level 18 and above, get a reference to BluetoothAdapter through
    // BluetoothManager.
    System.out.println("BluetoothLeService initialize"+mBluetoothManagerR);
    if (mBluetoothManagerR == null) {
        mBluetoothManagerR = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
        if (mBluetoothManagerR == null) {
            Log.e(TAG, "Unable to initialize BluetoothManager.");
            return false;
        }
    }

    mBluetoothAdapterR = mBluetoothManagerR.getAdapter();
    if (mBluetoothAdapterR == null) {
        Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
        return false;
    }

    return true;
}

#### Get Instance of BluetoothDevice

final BluetoothDevice deviceL = mBluetoothAdapterL.getRemoteDevice(addressL);
    if (deviceL == null) {
        Log.w(TAG, "Device not found.  Unable to connect.");
        return false;
    }

#### The Smart Insole communicates with classic Bluetooth, why does it use BLE connection?
:::warning

synchronized(this)
{
    mBluetoothGattR = deviceR.connectGatt(this, false, mGattCallbackR);
}

:::

#### Protocol of SmartInsole
##### Reference project

private String start_bytes = "0 254 128";
private int max_data_len = 114;
private int ns_list[] = {58, 76, 77, 78, 79, 80, 81, 82, 83, 84, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 112, 113, 114};//不要的資料

:::warning
1.此專案為何有其他藍芽裝置進行連線
2.為何使用BLE Protocol，而非Classic Bt
:::

#### Implement Scheme
#### Classic Bluetooth
##### 從第三方藍芽APP得知，此SmartInsole運行在Classic Bt protocol

#### 檢查手機端是否支援藍芽協議

public void CheckPhoneBt(Activity activity){
    Context context = activity.getApplicationContext();
//        bluetoothManager = context.getSystemService(BluetoothManager.class);
//        bluetoothAdapter = bluetoothManager.getAdapter();
    if (bluetoothAdapter == null) {
        Toast.makeText(context, "The Device don't support bt", Toast.LENGTH_SHORT).show();
    }//determine that device is support bluetooth

    if (!bluetoothAdapter.isEnabled()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        activity.startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }

}

#### 以BluetoothAdapter 取得 遠端藍芽裝置 之 BluetoothDevice類資訊

public BluetoothDevice getBtDevice(String mac){
    bluetoothDeviceL = bluetoothAdapter.getRemoteDevice(mac);  //取得遠端藍芽裝置 BluetoothDeviceL 類資料。
//        Log.d(TAG, bluetoothDeviceL.getName());
//        Log.d(TAG, bluetoothDeviceL.getAddress());
    return bluetoothDeviceL;
    }

#### Create socket between app and remote devices.

private BluetoothSocket CreatSocket(BluetoothDevice device){
    BluetoothSocket tmp = null;
    try{
        tmp = device.createRfcommSocketToServiceRecord(SerialPortUUID_L);
    }catch (IOException e){
        Log.e("Connect_socket", "Socket's create() method failed",e);
    }
    return tmp;
    }//CreatSocket()

#### Connecting socket with remote device

private boolean btConnectSocket(BluetoothSocket mmSocket){
    bluetoothAdapter.cancelDiscovery();
    try {
        // Connect to the remote device through the socket. This call blocks
        // until it succeeds or throws an exception.
        mmSocket.connect();
        Log.d(TAG, "client socket connected");
    } catch (IOException connectException) {
        // Unable to connect; close the socket and return.
        try {
            mmSocket.close();
        } catch (IOException closeException) {
            Log.e(TAG, "Could not close the client socket", closeException);
        }
        return false;
    }

    if(mmSocket.isConnected() == true){
        Log.d(TAG, "build socket sucess");
        return true;
//            BtSerialThread btSerialThread = new BtSerialThread(mmSocket, "SmartInsole_L");
//
//            btSerialThread.write(end_cmd_byte);
//            btSerialThread.write(start_cmd_byte);
//            btSerialThread.run();
    }

    return false;
}//btConnectSocket()

#### Finally, generator a thread to handle bt communication

#### Android Studio Bluetooth 進度
1. Creating and building socket between app and smart insole through classic bluetooth. 完成
2. Read and collect data through the socket.


#### Android Studio and FastAPI MQTT進度
1. transmit data through Topic between app and server. 已完成.
2. 將手機讀取到的足底壓力資料透過MQTT傳輸資料至FastAPI Server做處理.進行中

#### Android GUI 移植 (0%)

#### 與組員討論如何部署Model至FastAPI or App

---
#### 壓力值的分布