This post show how to run the Android Bluetooth Le Gatt example Code to link with Arduino/Genuino 101.
The Arduino/Genuino 101 board contains the Intel® Curie™ Module. The 101 adds Bluetooth Low Energy capabilities and has an on-board 6-axis accelerometer/gyroscope, providing exciting opportunities for building creative projects in the connected world. More information about the technical specifications and documentation can be found on the Arduino/Genuino 101 main page.
In Arduino/Genuino 101 board, program with example:
> File > Examples > CurieBLE > CallbackLED
This example setup Arduino/Genuino 101 as Bluetooth LE device (named "LEDCB") with service with UUID "19B10000-E8F2-537E-4F6C-D104768A1214" and create switch characteristic allowing remote device to read and write, with UUID "19B10001-E8F2-537E-4F6C-D104768A1214". We need the UUIDs in future examples.
So I copy here for future reference:
/*
Copyright (c) 2015 Intel Corporation. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-
1301 USA
*/
#include <CurieBLE.h>
const int ledPin = 13; // set ledPin to use on-board LED
BLEPeripheral blePeripheral; // create peripheral instance
BLEService ledService("19B10000-E8F2-537E-4F6C-D104768A1214"); // create service
// create switch characteristic and allow remote device to read and write
BLECharCharacteristic switchChar("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
void setup() {
Serial.begin(9600);
pinMode(ledPin, OUTPUT); // use the LED on pin 13 as an output
// set the local name peripheral advertises
blePeripheral.setLocalName("LEDCB");
// set the UUID for the service this peripheral advertises
blePeripheral.setAdvertisedServiceUuid(ledService.uuid());
// add service and characteristic
blePeripheral.addAttribute(ledService);
blePeripheral.addAttribute(switchChar);
// assign event handlers for connected, disconnected to peripheral
blePeripheral.setEventHandler(BLEConnected, blePeripheralConnectHandler);
blePeripheral.setEventHandler(BLEDisconnected, blePeripheralDisconnectHandler);
// assign event handlers for characteristic
switchChar.setEventHandler(BLEWritten, switchCharacteristicWritten);
// set an initial value for the characteristic
switchChar.setValue(0);
// advertise the service
blePeripheral.begin();
Serial.println(("Bluetooth device active, waiting for connections..."));
}
void loop() {
// poll peripheral
blePeripheral.poll();
}
void blePeripheralConnectHandler(BLECentral& central) {
// central connected event handler
Serial.print("Connected event, central: ");
Serial.println(central.address());
}
void blePeripheralDisconnectHandler(BLECentral& central) {
// central disconnected event handler
Serial.print("Disconnected event, central: ");
Serial.println(central.address());
}
void switchCharacteristicWritten(BLECentral& central, BLECharacteristic& characteristic) {
// central wrote new value to characteristic, update LED
Serial.print("Characteristic event, written: ");
if (switchChar.value()) {
Serial.println("LED on");
digitalWrite(ledPin, HIGH);
} else {
Serial.println("LED off");
digitalWrite(ledPin, LOW);
}
}
In Android side, load with example code of Bluetooth Le Gatt:
How it run:
This demo haven't show any real function indeed. In coming posts, I will TRY to implement my own example app (with re-using part of the Bluetooth Le Gatt example) to control and read state from Genuino 101. Currently, I don't know how much I can.
Here we will send dummy data of Heart Rate Measurement profile by Arduino Due + HM-10.
First of all, edit BluetoothLeService.java to resume original handling for Heart Rate Measurement profile:
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.bluetoothlegatt;
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import java.util.List;
import java.util.UUID;
/**
* Service for managing connection and data communication with a GATT server hosted on a
* given Bluetooth LE device.
*/
public class BluetoothLeService extends Service {
private final static String TAG = BluetoothLeService.class.getSimpleName();
private BluetoothManager mBluetoothManager;
private BluetoothAdapter mBluetoothAdapter;
private String mBluetoothDeviceAddress;
private BluetoothGatt mBluetoothGatt;
private int mConnectionState = STATE_DISCONNECTED;
private static final int STATE_DISCONNECTED = 0;
private static final int STATE_CONNECTING = 1;
private static final int STATE_CONNECTED = 2;
public final static String ACTION_GATT_CONNECTED =
"com.example.bluetooth.le.ACTION_GATT_CONNECTED";
public final static String ACTION_GATT_DISCONNECTED =
"com.example.bluetooth.le.ACTION_GATT_DISCONNECTED";
public final static String ACTION_GATT_SERVICES_DISCOVERED =
"com.example.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED";
public final static String ACTION_DATA_AVAILABLE =
"com.example.bluetooth.le.ACTION_DATA_AVAILABLE";
public final static String EXTRA_DATA =
"com.example.bluetooth.le.EXTRA_DATA";
public final static UUID UUID_HEART_RATE_MEASUREMENT =
UUID.fromString(SampleGattAttributes.HM_10);
// Implements callback methods for GATT events that the app cares about. For example,
// connection change and services discovered.
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
if (newState == BluetoothProfile.STATE_CONNECTED) {
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
Log.i(TAG, "Connected to GATT server.");
// Attempts to discover services after successful connection.
Log.i(TAG, "Attempting to start service discovery:" +
mBluetoothGatt.discoverServices());
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
Log.i(TAG, "Disconnected from GATT server.");
broadcastUpdate(intentAction);
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
};
private void broadcastUpdate(final String action) {
final Intent intent = new Intent(action);
sendBroadcast(intent);
}
private void broadcastUpdate(final String action,
final BluetoothGattCharacteristic characteristic) {
final Intent intent = new Intent(action);
// This is special handling for the Heart Rate Measurement profile. Data parsing is
// carried out as per profile specifications:
// http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml
if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
int flag = characteristic.getProperties();
int format = -1;
if ((flag & 0x01) != 0) {
format = BluetoothGattCharacteristic.FORMAT_UINT16;
Log.d(TAG, "Heart rate format UINT16.");
} else {
format = BluetoothGattCharacteristic.FORMAT_UINT8;
Log.d(TAG, "Heart rate format UINT8.");
}
final int heartRate = characteristic.getIntValue(format, 1);
Log.d(TAG, String.format("Received heart rate: %d", heartRate));
intent.putExtra(EXTRA_DATA, String.valueOf(heartRate));
} else {
// For all other profiles, writes the data formatted in HEX.
final byte[] data = characteristic.getValue();
if (data != null && data.length > 0) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for(byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));
intent.putExtra(EXTRA_DATA, new String(data) + "\n" + stringBuilder.toString());
}
}/*
Log.v("AndroidLE", "broadcastUpdate()");
final byte[] data = characteristic.getValue();
Log.v("AndroidLE", "data.length: " + data.length);
if (data != null && data.length > 0) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for(byte byteChar : data) {
stringBuilder.append(String.format("%02X ", byteChar));
Log.v("AndroidLE", String.format("%02X ", byteChar));
}
intent.putExtra(EXTRA_DATA, new String(data) + "\n" + stringBuilder.toString());
}
*/
sendBroadcast(intent);
}
public class LocalBinder extends Binder {
BluetoothLeService getService() {
return BluetoothLeService.this;
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public boolean onUnbind(Intent intent) {
// After using a given device, you should make sure that BluetoothGatt.close() is called
// such that resources are cleaned up properly. In this particular example, close() is
// invoked when the UI is disconnected from the Service.
close();
return super.onUnbind(intent);
}
private final IBinder mBinder = new LocalBinder();
/**
* Initializes a reference to the local Bluetooth adapter.
*
* @return Return true if the initialization is successful.
*/
public boolean initialize() {
// For API level 18 and above, get a reference to BluetoothAdapter through
// BluetoothManager.
if (mBluetoothManager == null) {
mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
if (mBluetoothManager == null) {
Log.e(TAG, "Unable to initialize BluetoothManager.");
return false;
}
}
mBluetoothAdapter = mBluetoothManager.getAdapter();
if (mBluetoothAdapter == null) {
Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
return false;
}
return true;
}
/**
* Connects to the GATT server hosted on the Bluetooth LE device.
*
* @param address The device address of the destination device.
*
* @return Return true if the connection is initiated successfully. The connection result
* is reported asynchronously through the
* {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
* callback.
*/
public boolean connect(final String address) {
if (mBluetoothAdapter == null || address == null) {
Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
return false;
}
// Previously connected device. Try to reconnect.
if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
&& mBluetoothGatt != null) {
Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
if (mBluetoothGatt.connect()) {
mConnectionState = STATE_CONNECTING;
return true;
} else {
return false;
}
}
final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
if (device == null) {
Log.w(TAG, "Device not found. Unable to connect.");
return false;
}
// We want to directly connect to the device, so we are setting the autoConnect
// parameter to false.
mBluetoothGatt = device.connectGatt(this, false, mGattCallback);
Log.d(TAG, "Trying to create a new connection.");
mBluetoothDeviceAddress = address;
mConnectionState = STATE_CONNECTING;
return true;
}
/**
* Disconnects an existing connection or cancel a pending connection. The disconnection result
* is reported asynchronously through the
* {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
* callback.
*/
public void disconnect() {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.disconnect();
}
/**
* After using a given BLE device, the app must call this method to ensure resources are
* released properly.
*/
public void close() {
if (mBluetoothGatt == null) {
return;
}
mBluetoothGatt.close();
mBluetoothGatt = null;
}
/**
* Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
* asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
* callback.
*
* @param characteristic The characteristic to read from.
*/
public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.readCharacteristic(characteristic);
}
/**
* Enables or disables notification on a give characteristic.
*
* @param characteristic Characteristic to act on.
* @param enabled If true, enable notification. False otherwise.
*/
public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
boolean enabled) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
// This is specific to Heart Rate Measurement.
if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}
}
/**
* Retrieves a list of supported GATT services on the connected device. This should be
* invoked only after {@code BluetoothGatt#discoverServices()} completes successfully.
*
* @return A {@code List} of supported services.
*/
public List<BluetoothGattService> getSupportedGattServices() {
if (mBluetoothGatt == null) return null;
return mBluetoothGatt.getServices();
}
}
Connect Arduino Due and HM-10:
HM-10 VCC - Arduino Due 3.3V
HM-10 GND - Arduino Due GND
HM-10 Tx - Arduino Due Rx
HM-10 Rx - Arduino Due Tx
Program on Arduino Due, DueSimHeartRate.ino. It only send dummy heart rate data to serial port.
int LED = 13;
boolean LEDst = false;
byte c;
void setup() {
Serial3.begin(9600);
pinMode(LED, OUTPUT);
digitalWrite(LED, LEDst);
}
void loop() {
delay(1000);
c = (byte)0x00;
Serial3.write(c);
c = (byte)80;
Serial3.write(c);
delay(1000);
c = (byte)0x00;
Serial3.write(c);
c = (byte)81;
Serial3.write(c);
delay(10);
c = (byte)0x00;
Serial3.write(c);
c = (byte)82;
Serial3.write(c);
ToggleLED();
}
void ToggleLED(){
digitalWrite(LED, LEDst = !LEDst);
}
Previous exercise "Android example to communicate with Bluetooth device, HC-06 Bluetooth Module" show how to send string. Here we implement our command format, such that we can use SeekBar on Android to control brightness of the Arduino Due on-board LED (pin 13), via Bluetooth to HC-06 Bluetooth Module.
Android Side:
com.example.androidbtcontrol.MainActivity.java
/*
Android Example to connect to and communicate with Bluetooth
In this exercise, the target is a Arduino Due + HC-06 (Bluetooth Module)
*/
package com.example.androidbtcontrol;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Set;
import java.util.UUID;
public class MainActivity extends ActionBarActivity {
private static final int REQUEST_ENABLE_BT = 1;
BluetoothAdapter bluetoothAdapter;
ArrayList<BluetoothDevice> pairedDeviceArrayList;
TextView textInfo, textStatus;
ListView listViewPairedDevice;
LinearLayout inputPane;
SeekBar barAnalogOut;
ArrayAdapter<BluetoothDevice> pairedDeviceAdapter;
private UUID myUUID;
private final String UUID_STRING_WELL_KNOWN_SPP =
"00001101-0000-1000-8000-00805F9B34FB";
ThreadConnectBTdevice myThreadConnectBTdevice;
ThreadConnected myThreadConnected;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textInfo = (TextView)findViewById(R.id.info);
textStatus = (TextView)findViewById(R.id.status);
listViewPairedDevice = (ListView)findViewById(R.id.pairedlist);
inputPane = (LinearLayout)findViewById(R.id.inputpane);
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)){
Toast.makeText(this,
"FEATURE_BLUETOOTH NOT support",
Toast.LENGTH_LONG).show();
finish();
return;
}
//using the well-known SPP UUID
myUUID = UUID.fromString(UUID_STRING_WELL_KNOWN_SPP);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null) {
Toast.makeText(this,
"Bluetooth is not supported on this hardware platform",
Toast.LENGTH_LONG).show();
finish();
return;
}
String stInfo = bluetoothAdapter.getName() + "\n" +
bluetoothAdapter.getAddress();
textInfo.setText(stInfo);
barAnalogOut = (SeekBar)findViewById(R.id.analogOut);
barAnalogOut.setOnSeekBarChangeListener(OnAnalogOutChangeListener);
}
SeekBar.OnSeekBarChangeListener OnAnalogOutChangeListener =
new SeekBar.OnSeekBarChangeListener(){
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
//will generate too much data sent!
//SendAnalogOut(progress);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
SendAnalogOut(seekBar.getProgress());
}
};
private final byte SYNC_BYTE = (byte) 0xAA;
private final byte LENGTH_ANALOG = (byte) 3;
private final byte CMD_ANALOG = (byte) 1;
private void SendAnalogOut(int val){
byte[] bytesToSend = {SYNC_BYTE, LENGTH_ANALOG, CMD_ANALOG, (byte) val};
myThreadConnected.write(bytesToSend);
}
@Override
protected void onStart() {
super.onStart();
//Turn ON BlueTooth if it is OFF
if (!bluetoothAdapter.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
}
setup();
}
private void setup() {
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
pairedDeviceArrayList = new ArrayList<BluetoothDevice>();
for (BluetoothDevice device : pairedDevices) {
pairedDeviceArrayList.add(device);
}
pairedDeviceAdapter = new ArrayAdapter<BluetoothDevice>(this,
android.R.layout.simple_list_item_1, pairedDeviceArrayList);
listViewPairedDevice.setAdapter(pairedDeviceAdapter);
listViewPairedDevice.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
BluetoothDevice device =
(BluetoothDevice) parent.getItemAtPosition(position);
Toast.makeText(MainActivity.this,
"Name: " + device.getName() + "\n"
+ "Address: " + device.getAddress() + "\n"
+ "BondState: " + device.getBondState() + "\n"
+ "BluetoothClass: " + device.getBluetoothClass() + "\n"
+ "Class: " + device.getClass(),
Toast.LENGTH_LONG).show();
textStatus.setText("start ThreadConnectBTdevice");
myThreadConnectBTdevice = new ThreadConnectBTdevice(device);
myThreadConnectBTdevice.start();
}
});
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if(myThreadConnectBTdevice!=null){
myThreadConnectBTdevice.cancel();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode==REQUEST_ENABLE_BT){
if(resultCode == Activity.RESULT_OK){
setup();
}else{
Toast.makeText(this,
"BlueTooth NOT enabled",
Toast.LENGTH_SHORT).show();
finish();
}
}
}
//Called in ThreadConnectBTdevice once connect successed
//to start ThreadConnected
private void startThreadConnected(BluetoothSocket socket){
myThreadConnected = new ThreadConnected(socket);
myThreadConnected.start();
}
/*
ThreadConnectBTdevice:
Background Thread to handle BlueTooth connecting
*/
private class ThreadConnectBTdevice extends Thread {
private BluetoothSocket bluetoothSocket = null;
private final BluetoothDevice bluetoothDevice;
private ThreadConnectBTdevice(BluetoothDevice device) {
bluetoothDevice = device;
try {
bluetoothSocket = device.createRfcommSocketToServiceRecord(myUUID);
textStatus.setText("bluetoothSocket: \n" + bluetoothSocket);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void run() {
boolean success = false;
try {
bluetoothSocket.connect();
success = true;
} catch (IOException e) {
e.printStackTrace();
final String eMessage = e.getMessage();
runOnUiThread(new Runnable() {
@Override
public void run() {
textStatus.setText("something wrong bluetoothSocket.connect(): \n" + eMessage);
}
});
try {
bluetoothSocket.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
if(success){
//connect successful
final String msgconnected = "connect successful:\n"
+ "BluetoothSocket: " + bluetoothSocket + "\n"
+ "BluetoothDevice: " + bluetoothDevice;
runOnUiThread(new Runnable(){
@Override
public void run() {
textStatus.setText(msgconnected);
listViewPairedDevice.setVisibility(View.GONE);
inputPane.setVisibility(View.VISIBLE);
}});
startThreadConnected(bluetoothSocket);
}else{
//fail
}
}
public void cancel() {
Toast.makeText(getApplicationContext(),
"close bluetoothSocket",
Toast.LENGTH_LONG).show();
try {
bluetoothSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/*
ThreadConnected:
Background Thread to handle Bluetooth data communication
after connected
*/
private class ThreadConnected extends Thread {
private final BluetoothSocket connectedBluetoothSocket;
private final InputStream connectedInputStream;
private final OutputStream connectedOutputStream;
public ThreadConnected(BluetoothSocket socket) {
connectedBluetoothSocket = socket;
InputStream in = null;
OutputStream out = null;
try {
in = socket.getInputStream();
out = socket.getOutputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
connectedInputStream = in;
connectedOutputStream = out;
}
@Override
public void run() {
byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
bytes = connectedInputStream.read(buffer);
String strReceived = new String(buffer, 0, bytes);
final String msgReceived = String.valueOf(bytes) +
" bytes received:\n"
+ strReceived;
runOnUiThread(new Runnable() {
@Override
public void run() {
textStatus.setText(msgReceived);
}});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
final String msgConnectionLost = "Connection lost:\n"
+ e.getMessage();
runOnUiThread(new Runnable(){
@Override
public void run() {
textStatus.setText(msgConnectionLost);
}});
}
}
}
public void write(byte[] buffer) {
try {
connectedOutputStream.write(buffer);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void cancel() {
try {
connectedBluetoothSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
Learn how to interface with and control Arduino using Android devices
Discover how you can utilize the combined power of Android and Arduino for your own projects
Practical, step-by-step examples to help you unleash the power of Arduino with Android
Who This Book Is For
This book is for those who want to learn how to build exciting Arduino projects by interfacing it with Android. You will need to have some basic experience in electronics and programming. However, you don't need to have any previous experience with the Arduino or Android platforms.
In Detail
Arduino is an open source microcontroller built on a single-circuit board that is capable of receiving sensory input from the environment and controlling interactive physical objects.
The first few projects of this book will focus on displaying tweets within your app by connecting to Twitter, controlling basic functions of the Arduino board, and connecting an Arduino-powered weather station to an Android phone via Bluetooth. Next, you will learn how to use the Arduino Yun board to connect a standard USB camera to a local Wi-Fi network. At the end of the book, you will build a simple mobile robot, connect it to an Arduino board and a Bluetooth module, then control the robot from an Android phone using Bluetooth.
Each project is explained in a step-by-step fashion, always starting with the choice of components and the assembly of the hardware.
Learn how to control your home or car from your Android smartphone - air conditioning, lights, entertainment systems, and more!
Android Open Accessory is a new, simple, and secure protocol for connecting any microcontroller-empowered device to an Android smartphone or tablet. This Wrox guide shows Android programmers how to use AOA with Arduino, the microcontroller platform, to control such systems as lighting, air conditioning, and entertainment systems from Android devices. Furthermore, it teaches the circuit-building skills needed to create games and practical products that also take advantage of Android technology.
Introduces Android Open Accessory and shows how to set up the hardware and development environment
Explains how to code both Android and Arduino elements of an accessory
Features four complete projects developers can build using various sensors and indicators/actuators, including source code
Gives Android developers the tools to create powerful, sophisticated projects
Professional Android Open Accessory with Android ADK and Arduino opens exciting new opportunities for Android developers.
Download the files (Android Studio Format)
Download the files (Android Studio Format)
