我可以让我的Android应用程序通过蓝牙连接到我的Arduino。但是,它们之间不能传输数据。下面是我的设置和代码:
HTC Android v2.2,蓝牙配对金牌调制解调器,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);
}
我已经尝试使用115200和9600作为波特率,并且我已经尝试将蓝牙rx和tx引脚设置为输入/输出和输出/输入。Arduino正在接收来自PC的串行数据,但无法将其发送到Android (由于flashLED()方法,我可以看到这一点)。
Android根本不能向Arduino发送任何数据。然而,它们都是连接的,因为当我关闭连接时,调制解调器上的绿灯亮了又灭了,红色的led闪烁了。sendData()方法不会抛出异常,因为否则会出现showMessage("SEND FAILED");。
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" />
任何帮助都将不胜感激!
代码摘自:
http://bellcode.wordpress.com/2012/01/02/android-and-arduino-bluetooth-communication/
发布于 2012-04-29 21:38:06
只是解决了其他任何人遇到这个页面的问题。
似乎我的Arduino不喜欢我使用数字引脚进行串行通信,我使用的是TX和RX,这段代码取自http://jondontdoit.blogspot.com.au/2011/11/bluetooth-mate-tutorial.html,而且看起来9600而不是115200是一个很好的波特率。
/***********************
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);
}
发布于 2012-10-07 09:47:05
我也得到了同样的东西。我进入了“设置”->“无线和网络”->“蓝牙设置”并对设备进行了配对。我在我的UI中放置了用于显示配对设备的控件,我将看看是否可以编写代码来从我的UI管理配对设备。
发布于 2012-05-19 14:09:31
只有在替换了这一部分之后,我才能让它运行:
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;
}
}
}
有了这个:
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");
}
在那里我输入了蓝牙设备的地址。原始代码会找到设备并返回正确的地址,但是mmSocket.connect();会生成异常"java.io.IOException:服务发现失败“
有什么建议吗?
https://stackoverflow.com/questions/10327506
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