Ytukyg

I am unable to retrieve the data from Arduino. Is there anything wrong with my code? I have tried many different ways to get data from the Arduino but still to no avail.

Android Studio Code

package com.example.a17019501.bluetootharduino;



import android.bluetooth.BluetoothAdapter;

import android.bluetooth.BluetoothDevice;

import android.bluetooth.BluetoothSocket;

import android.content.Intent;

import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.widget.TextView;



import org.w3c.dom.Text;



import java.io.IOException;

import java.io.InputStream;

import java.util.Set;

import java.util.UUID;



public class MainActivity extends AppCompatActivity {



    private static final String TAG = "MainActivity";

    //Layout//

    TextView adapterStatus;

    TextView lightValue;



    //Bluetooth//

    BluetoothAdapter mBluetoothAdapter;

    BluetoothDevice mDevice;

    Set <BluetoothDevice> pairedDevices;

    ConnectThread mConnectThread;

    ConnectedThread mConnectedThread;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        adapterStatus = findViewById(R.id.tvAdapterStatus);

        lightValue = findViewById(R.id.tvLightValue);



        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();



        if (mBluetoothAdapter == null) {

            adapterStatus.setText("Device does not support bluetooth");

        }

        else {

            adapterStatus.setText("Device support bluetooth");

        }

        if (!mBluetoothAdapter.isEnabled()) {

            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

            startActivityForResult(enableBtIntent, 1);

        }

        pairedDevices = mBluetoothAdapter.getBondedDevices();

        if (pairedDevices.size() > 0) {

            for (BluetoothDevice device : pairedDevices) {

                mDevice = device;

            }

        }

        mConnectThread = new ConnectThread(mDevice);

        mConnectThread.start();

        Log.i(TAG, "Connect to device: " + mDevice.getName());

    }

    public class ConnectThread extends Thread {

        private final BluetoothSocket mmSocket;

        private final BluetoothDevice mmDevice;

        private final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");

        public ConnectThread(BluetoothDevice device) {

            BluetoothSocket tmp = null;

            mmDevice = device;

            try {

                tmp = device.createRfcommSocketToServiceRecord(MY_UUID);

            } catch (IOException e) { }

            mmSocket = tmp;

        }

        public void run() {

            mBluetoothAdapter.cancelDiscovery();

            try {

                mmSocket.connect();

            } catch (IOException connectException) {

                try {

                    mmSocket.close();

                } catch (IOException closeException) { }

                return;

            }

            mConnectedThread = new ConnectedThread(mmSocket);

            mConnectedThread.start();

        }

        public void cancel() {

            try {

                mmSocket.close();

            } catch (IOException e) { }

        }

    }

    public class ConnectedThread extends Thread {

        private final BluetoothSocket mmSocket;

        private final InputStream mmInstream;



        public ConnectedThread(BluetoothSocket socket) {

            Log.i(TAG, "Connected Thread");



            mmSocket = socket;

            InputStream tmpIn = null;



            try {

                tmpIn = mmSocket.getInputStream();

            } catch (IOException e) {

                e.printStackTrace();

            }

            mmInstream = tmpIn;

        }



        public void run() {

            byte buffer = new byte[1024];



            int bytes;



            while (true) {

                try {

                    bytes = mmInstream.read(buffer);

                    Log.i(TAG, "Buffer read");

                    String incomingMsg = new String(buffer, 0, bytes);

                    mHandler.obtainMessage(1, bytes, -1, buffer);

                    Log.i(TAG, "InputStream " + incomingMsg);

                } catch (IOException e) {

                    e.printStackTrace();

                    Log.i(TAG, "Error reading input " + e.getMessage());

                }

            }

        }



        public void cancel() {

            try {

                mmSocket.close();

            } catch (IOException e) {



            }

        }

    }

    Handler mHandler = new Handler() {

        String s;



        @Override

        public void handleMessage(Message msg) {

            switch(msg.what) {

                case 1:

                    s = (String) msg.obj;

                    if (s!=null) {

                        lightValue.setText(Integer.parseInt(s));

                    }

                    break;

            }

        }

    };

}`

Arduino Code

#include <SoftwareSerial.h>



const int LightSensor = A1; //LightSensor pin at A1



int bluetoothTx = 2; //BTTX at pin 2

int bluetoothRx = 3; //BTRX at pin 3

int sensorValue = 0;



SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);



void setup() {

  Serial.begin(9600);  // Begin the serial monitor at 9600bps

  bluetooth.begin(9600);  // Start bluetooth serial at 9600

}



void loop() {

  sensorValue = analogRead(LightSensor);

  bluetooth.print(sensorValue);

  Serial.println(sensorValue);

  delay(2500);

}