从Arduino读取蓝牙串行数据Android一次

我目前正面临一个串行通信问题，现在我已经难倒了好几天了 .

该应用程序是一种个人RFID标签库存系统 . 最终目标是扫描RFID标签并将其记录到arduino FRAM中，并将标签数据中继到我正在制作的Android智能手机应用程序中 . 我是Java和Android开发的新手，我在阅读arduino写的（RX）串行数据时遇到了问题 .

我正在使用蓝牙适配器（Bluesmirf，RN42调制解调器），配对和连接都很好 .

我能够从Android手机传输一个“刷新库存”切换，并且Arduino确实收到它，因为它跳转到AndroidRefresh（）函数，如代码中所示 . 但是，当我尝试编写测试RFID标签时，Android看不到任何东西 .

我80％肯定这是我的Android代码中的一个缺陷 . 我想也许它是一个“时间”问题，因为只要在Android上切换“刷新库存”按钮，就会发送“flag int”将arduino发送到AndroidRefresh（），并立即在两个脚本中， arduino写道，Android听 . 我是串口通讯的新手，我不确定这些数据是否因某种原因从缓冲区中消失了？

谢谢你的帮助 . 这真让我抓狂 .

Arduino片段：

#include <SoftwareSerial.h>
#include <EEPROM.h>
#include < avr/interrupt.h >
#include < avr/io.h >

//setup serial for RFID reader
#define rxPin 3
#define txPin 2
SoftwareSerial rfserial = SoftwareSerial(rxPin, txPin);

//seek command 0x82
byte SeekCard[] = {0xFF,0x00,0x01,0x82,0x83};
byte value;
int k;
char incomingChar;
long convert = 0;

void setup()
    {

     //set the Serial monitor to preferred baud rate
    Serial.begin(9600);
    //RFID reader is defaulted to 19200 baud rate
    rfserial.begin(19200);
   // for (int i =0; i< 7; i++){


                 // convert = convert + test[i];
                  //Serial.println(convert, DEC);
                 // delay(100);

            //    }

    }



void loop()
{

  //find a tag
  if (rfserial.available() > 0){
    SeekTag();
  }

  if (Serial.available() > 0){ 
  androidRefresh(); // Refresh Inventory
  while(Serial.available()>0) Serial.read(); //CLEARS RX BUFFER

  }
}

void SeekTag(){ 
// Do RFID stuff
}

void androidRefresh()
{
  //*************receiving a message from Android and printing on Arduino************************* 
                byte test[] = {0xFF,0x00,0x01,0x82,0x83, 0xFC, 0x64, 0xD0, 0x82,0x83, 0xFF};
                //Serial.println("Refreshing Inventory...");


                for (int i =0; i< 11; i++){                  
                 Serial.write(test[i]);
                 Serial.println(test[i]);
                // Serial.println(test[i], HEX);
               }

                //while(Serial.available()>0) Serial.read(); //CLEARS RX BUFFER



}

和Android Java活动：

public class InventoryActivity extends Activity {

    /** Bluetooth Variables **/

    private static BluetoothSocket mbtSocket;
    private static InputStream mbtInputStream;
    private static OutputStream mbtOutputStream;

    private static final String TAG = "SmartFridge"; //Debug
    private static final boolean D = true;          // Debug

    OutputStream tmpOut = null;
    OutputStream mmOutStream = null;    
    InputStream tmpIn = null;
    InputStream mmInStream = null;
    byte[] buffer = new byte[1024];;  // buffer store for the stream
    int bytes; // bytes returned from read()
    int numberofbytes = 0;










  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.inventory);


    final ListView listview = (ListView) findViewById(R.id.listview);
    String[] values = new String[] {    "Item 1 from Arduino",
                                        "Item 2 from Arduino", 
                                        "Item 3 from Arduino",
                                        "Item 4 from Arduino",
                                        "Item 5 from Arduino", 
                                        "and the beat goes on"};

    final ArrayList<String> list = new ArrayList<String>();
    for (int i = 0; i < values.length; ++i) {
      list.add(values[i]);
    }
    final StableArrayAdapter adapter = new StableArrayAdapter(this,
        android.R.layout.simple_list_item_1, list);
    listview.setAdapter(adapter);


  }



  // Menu Stuff

        // Initiating Menu XML file (menu.xml)
        @Override
        public boolean onCreateOptionsMenu(Menu menu)
        {
            MenuInflater menuInflater = getMenuInflater();
            menuInflater.inflate(R.menu.inventory_menu, menu);
            return true;
        }

        /**
         * Event Handling for Individual menu item selected
         * Identify single menu item by it's id
         * */
        @Override
        public boolean onOptionsItemSelected(MenuItem item)
        {

            switch (item.getItemId())
            {

            case R.id.menu_search:
                Toast.makeText(InventoryActivity.this, "Refreshing...", Toast.LENGTH_SHORT).show();

                {    
                    // As suggested by http://developer.android.com/guide/topics/connectivity/bluetooth.html

                    mbtSocket = btWrapper.getSocket();                  


                    try {
                        tmpOut = mbtSocket.getOutputStream();
                        tmpIn = mbtSocket.getInputStream();
                        if(D) Log.e(TAG, "Test 1");
                    } catch (IOException e1) {  }                   
                    mmOutStream = tmpOut;   
                    mmInStream = tmpIn;
                    if(D) Log.e(TAG, "Test 2");
                    try {                       
                                mmOutStream.write(600); // Can be anything, only UI request is to send FRAM contents from Arduino once toggled on phone
                                if(D) Log.e(TAG, "Serial Message Sent to Arduino for Refresh");


                    }
                    catch(Exception e) {}


              }
                /** Read Bluetooth Stuff **/

                // Read from the InputStream
                try {   
                        numberofbytes = mmInStream.available();
                        if(D) Log.e(TAG, numberofbytes + " bytes ready to read");
                        if( mmInStream.available() > 0 )
                        {
                            bytes = mmInStream.read(buffer);
                            if(D) Log.e(TAG, "Received Data from Arduino");
                            if(D) Log.e(TAG, "Received:" + bytes);
                        }



                } catch (IOException e) {
                    if(D) Log.e(TAG, "Did not receive data from Arduino");
                }

                /** End Read Bluetooth Stuff **/



                return true;


            default:
                return super.onOptionsItemSelected(item);
            }
        }   


  //End Menu STuff

  private class StableArrayAdapter extends ArrayAdapter<String> {

    HashMap<String, Integer> mIdMap = new HashMap<String, Integer>();

    public StableArrayAdapter(Context context, int textViewResourceId,
        List<String> objects) {
      super(context, textViewResourceId, objects);
      for (int i = 0; i < objects.size(); ++i) {
        mIdMap.put(objects.get(i), i);
      }
    }

    @Override
    public long getItemId(int position) {
      String item = getItem(position);
      return mIdMap.get(item);
    }

    @Override
    public boolean hasStableIds() {
      return true;
    }

  }

}