我可以通过蓝牙将我的Android应用程序连接到我的Arduino。但是,它们之间不能传输数据。以下是我的设置和代码:
HTC Android v2.2,蓝牙伴侣黄金调制解调器,Arduino Mega(ATmega1280)
Android Java代码:
package com.example.BluetoothExample;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;
import android.widget.EditText;
import android.widget.Button;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Set;
import java.util.UUID;
public class BluetoothExampleActivity extends Activity {
TextView myLabel;
EditText myTextbox;
BluetoothAdapter mBluetoothAdapter;
BluetoothSocket mmSocket;
BluetoothDevice mmDevice;
OutputStream mmOutputStream;
InputStream mmInputStream;
Thread workerThread;
byte[] readBuffer;
int readBufferPosition;
int counter;
volatile boolean stopWorker;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button openButton = (Button)findViewById(R.id.open);
Button sendButton = (Button)findViewById(R.id.send);
Button closeButton = (Button)findViewById(R.id.close);
myLabel = (TextView)findViewById(R.id.label);
myTextbox = (EditText)findViewById(R.id.entry);
//Open Button
openButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
findBT();
openBT();
}
catch (IOException ex) { }
}
});
//Send Button
sendButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
sendData();
}
catch (IOException ex) {
showMessage("SEND FAILED");
}
}
});
//Close button
closeButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
closeBT();
}
catch (IOException ex) { }
}
});
}
void findBT() {
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if(mBluetoothAdapter == null) {
myLabel.setText("No bluetooth adapter available");
}
if(!mBluetoothAdapter.isEnabled()) {
Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBluetooth, 0);
}
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if(pairedDevices.size() > 0) {
for(BluetoothDevice device : pairedDevices) {
if(device.getName().equals("FireFly-108B")) {
mmDevice = device;
break;
}
}
}
myLabel.setText("Bluetooth Device Found");
}
void openBT() throws IOException {
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); //Standard //SerialPortService ID
mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);
mmSocket.connect();
mmOutputStream = mmSocket.getOutputStream();
mmInputStream = mmSocket.getInputStream();
beginListenForData();
myLabel.setText("Bluetooth Opened");
}
void beginListenForData() {
final Handler handler = new Handler();
final byte delimiter = 10; //This is the ASCII code for a newline character
stopWorker = false;
readBufferPosition = 0;
readBuffer = new byte[1024];
workerThread = new Thread(new Runnable() {
public void run() {
while(!Thread.currentThread().isInterrupted() && !stopWorker) {
try {
int bytesAvailable = mmInputStream.available();
if(bytesAvailable > 0) {
byte[] packetBytes = new byte[bytesAvailable];
mmInputStream.read(packetBytes);
for(int i=0;i<bytesAvailable;i++) {
byte b = packetBytes[i];
if(b == delimiter) {
byte[] encodedBytes = new byte[readBufferPosition];
System.arraycopy(readBuffer, 0, encodedBytes, 0, encodedBytes.length);
final String data = new String(encodedBytes, "US-ASCII");
readBufferPosition = 0;
handler.post(new Runnable() {
public void run() {
myLabel.setText(data);
}
});
}
else {
readBuffer[readBufferPosition++] = b;
}
}
}
}
catch (IOException ex) {
stopWorker = true;
}
}
}
});
workerThread.start();
}
void sendData() throws IOException {
String msg = myTextbox.getText().toString();
msg += "\n";
//mmOutputStream.write(msg.getBytes());
mmOutputStream.write('A');
myLabel.setText("Data Sent");
}
void closeBT() throws IOException {
stopWorker = true;
mmOutputStream.close();
mmInputStream.close();
mmSocket.close();
myLabel.setText("Bluetooth Closed");
}
private void showMessage(String theMsg) {
Toast msg = Toast.makeText(getBaseContext(),
theMsg, (Toast.LENGTH_LONG)/160);
msg.show();
}
}
Arduino代码:
#include <SoftwareSerial.h>
int bluetoothTx = 45;
int bluetoothRx = 47;
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup() {
//pinMode(45, OUTPUT);
//pinMode(47, INPUT);
pinMode(53, OUTPUT);
//Setup usb serial connection to computer
Serial.begin(9600);
//Setup Bluetooth serial connection to android
bluetooth.begin(115200);
bluetooth.print("$$$");
delay(100);
bluetooth.println("U,9600,N");
bluetooth.begin(9600);
}
void loop() {
//Read from bluetooth and write to usb serial
if(bluetooth.available()) {
char toSend = (char)bluetooth.read();
Serial.print(toSend);
flashLED();
}
//Read from usb serial to bluetooth
if(Serial.available()) {
char toSend = (char)Serial.read();
bluetooth.print(toSend);
flashLED();
}
}
void flashLED() {
digitalWrite(53, HIGH);
delay(500);
digitalWrite(53, LOW);
}
我尝试使用115200和9600作为波特率,我尝试将蓝牙rx和tx引脚设置为输入/输出和输出/输入。 Arduino正在从PC接收串行数据但无法将其发送到Android(我可以看到这是因为flashLED()方法)。
Android无法向Arduino发送任何数据。但是它们都已连接,因为调制解调器上的绿灯亮起然后熄灭,当我关闭连接时,红色指示灯闪烁。 sendData()方法不会抛出异常,否则showMessage(“SEND FAILED”);会出现。
我的清单.xml
中也有这个<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="8" />
非常感谢任何帮助!
代码取自:
http://bellcode.wordpress.com/2012/01/02/android-and-arduino-bluetooth-communication/
答案 0 :(得分:13)
刚刚解决了遇到此页面的其他人的问题。
似乎我的Arduino不喜欢使用数字引脚进行串行通信,我使用TX和RX而不是使用http://jondontdoit.blogspot.com.au/2011/11/bluetooth-mate-tutorial.html中的代码,似乎9600是一个很好的波特而不是115200。
/***********************
Bluetooth test program
***********************/
//TODO
//TEST THIS PROGRAM WITH ANDROID,
//CHANGE PINS TO RX AND TX THO ON THE ARDUINO!
//int counter = 0;
int incomingByte;
void setup() {
pinMode(53, OUTPUT);
Serial.begin(9600);
}
void loop() {
// see if there's incoming serial data:
if (Serial.available() > 0) {
// read the oldest byte in the serial buffer:
incomingByte = Serial.read();
// if it's a capital R, reset the counter
if (incomingByte == 'g') {
digitalWrite(53, HIGH);
delay(500);
digitalWrite(53, LOW);
delay(500);
//Serial.println("RESET");
//counter=0;
}
}
//Serial.println(counter);
//counter++;
//delay(250);
}
答案 1 :(得分:5)
我得到了同样的东西。我进入了“设置” - &gt;'无线和网络' - &gt;'蓝牙设置'并配对设备。当我回去重新运行我的代码时,它连接起来,也不例外。我在我的UI中放置控件以显示配对设备,我将看看是否可以编写代码来管理我的UI中的配对设备。
答案 2 :(得分:1)
我只有在替换此部分后才能运行它:
Set<BluetoothDevice> pairedDevices = BluetoothAdapter.getBondedDevices();
if(pairedDevices.size() > 0)
{
for(BluetoothDevice device : pairedDevices)
{
if(device.getName().startsWith("FireFly-"))
{
mmDevice = device;
Log.d("ArduinoBT", "findBT found device named " + mmDevice.getName());
Log.d("ArduinoBT", "device address is " + mmDevice.getAddress());
break;
}
}
}
用这个:
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
mmDevice = mBluetoothAdapter.getRemoteDevice("00:06:66:46:5A:91");
if (pairedDevices.contains(mmDevice))
{
statusText.setText("Bluetooth Device Found, address: " + mmDevice.getAddress() );
Log.d("ArduinoBT", "BT is paired");
}
我输入了蓝牙设备的地址。 原始代码找到设备并返回正确的地址,但是 mmSocket.connect(); 生成异常“java.io.IOException:Service discovery failed”
建议?
答案 3 :(得分:1)
对于找到此页面的人,但如上所述使用硬编码的mac地址卡住,请将mac地址设置为NULL,并将此代码插入OnResume()
try{
File f = new File(Environment.getExternalStorageDirectory()+"/mac.txt");
FileInputStream fileIS = new FileInputStream(f);
buf = new BufferedReader(new InputStreamReader(fileIS));
String readString = new String();
while((readString = buf.readLine())!= null){
address = readString;
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e){
e.printStackTrace();
}
另外,不要忘记允许eclipse包含必要的库,并将你的mac地址放在SD卡根目录的mac.txt中,然后你可以简单地给用户一个带有mac地址的文本文件,同时仍然允许应用程序从市场下载而无需自定义每个实例。
答案 4 :(得分:1)
@Backwards_Dave只是为了好奇,尝试连接45和46引脚并使用这个简单的代码。我用它并没有问题。您将能够从Arduino串行监视器发送数据并在那里阅读。
/*
Pinout:
45 --> BT module Tx
46 --> BT module Rx
*/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(45, 46); // RX, TX
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
Serial.println("I am ready to send some stuff!");
// set the data rate for the SoftwareSerial port
mySerial.begin(9600);
}
void loop() // run over and over
{
if (mySerial.available())
Serial.write(mySerial.read());
if (Serial.available())
mySerial.write(Serial.read());
}
另外,你为Arduino使用什么BlueTooth盾牌? HC-06?
修改强>
刚刚使用Mega2560进行了测试(没有1280),它没有问题。
我认为问题在于引脚。
等待您的反馈
答案 5 :(得分:1)
如果您仍在寻找答案,请尝试更改软件序列引脚。这是您正在使用的库的众所周知的限制。
并非所有Mega支架上的引脚都会改变中断,因此只有以下内容可用于RX:10,11,12,13,14,15,50,51,52,53,A8(62),A9( 63),A10(64),A11(65),A12(66),A13(67),A14(68),A15(69)。 Refs
希望这有帮助。
答案 6 :(得分:0)
我认为这可能是蓝牙的一些错误..重新安装其驱动程序更好..因为上面给出的代码看起来是正确的。