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#include <SoftwareSerial.h>   //Software Serial Port
#define RxD 6
#define TxD 7
 
SoftwareSerial blueToothSerial(RxD,TxD);
 
void setup() 
{ 
  Serial.begin(9600);
  pinMode(RxD, INPUT);
  pinMode(TxD, OUTPUT);
  setupBlueToothConnection(); 
} 
 
void loop() 
{ 
  char recvChar;
  while(1){
    if(blueToothSerial.available()){//check if there's any data sent from the remote bluetooth shield
      recvChar = blueToothSerial.read();
      Serial.print(recvChar);
    }
    if(Serial.available()){//check if there's any data sent from the local serial terminal, you can add the other applications here
      recvChar  = Serial.read();
      blueToothSerial.print(recvChar);
    }
  }
} 
 
void setupBlueToothConnection()
{
  blueToothSerial.begin(38400); //Set BluetoothBee BaudRate to default baud rate 38400
  blueToothSerial.print("\r\n+STWMOD=0\r\n"); //set the bluetooth work in slave mode
  blueToothSerial.print("\r\n+STNA=SeeedBTSlave\r\n"); //set the bluetooth name as "SeeedBTSlave"
  blueToothSerial.print("\r\n+STPIN=0000\r\n");//Set SLAVE pincode"0000"
  blueToothSerial.print("\r\n+STOAUT=1\r\n"); // Permit Paired device to connect me
  blueToothSerial.print("\r\n+STAUTO=0\r\n"); // Auto-connection should be forbidden here
  delay(2000); // This delay is required.
  blueToothSerial.print("\r\n+INQ=1\r\n"); //make the slave bluetooth inquirable 
  Serial.println("The slave bluetooth is inquirable!");
  delay(2000); // This delay is required.
  blueToothSerial.flush();
}

#include <SoftwareSerial.h>   //Software Serial Port

#define RxD 6
#define TxD 7

String retSymb = "+RTINQ=";//start symble when there's any return
String slaveName = ";SeeedBTSlave";//Set the Slave name ,caution that ';'must be included
int nameIndex = 0;
int addrIndex = 0;

String recvBuf;
String slaveAddr;

String connectCmd = "\r\n+CONN=";

SoftwareSerial blueToothSerial(RxD,TxD);
 
void setup() 
{ 
  Serial.begin(9600);
  pinMode(RxD, INPUT);
  pinMode(TxD, OUTPUT);
  setupBlueToothConnection();
  //wait 1s and flush the serial buffer
  delay(1000);
  Serial.flush();
  blueToothSerial.flush();
} 
 
void loop() 
{
  char recvChar;
  while(1){
    if(blueToothSerial.available()){//check if there's any data sent from the remote bluetooth shield
      recvChar = blueToothSerial.read();
      Serial.print(recvChar);
    }
    if(Serial.available()){//check if there's any data sent from the local serial terminal, you can add the other applications here
      recvChar  = Serial.read();
      blueToothSerial.print(recvChar);
    }   
 } 
} 
 
void setupBlueToothConnection()
{
  blueToothSerial.begin(38400); //Set BluetoothBee BaudRate to default baud rate 38400
  blueToothSerial.print("\r\n+STWMOD=1\r\n");//set the bluetooth work in master mode
  blueToothSerial.print("\r\n+STNA=SeeedBTMaster\r\n");//set the bluetooth name as "SeeedBTMaster"
  blueToothSerial.print("\r\n+STPIN=0000\r\n");//Set Master pincode"0000",it must be same as Slave pincode
  blueToothSerial.print("\r\n+STAUTO=0\r\n");// Auto-connection is forbidden here
  delay(2000); // This delay is required.
  blueToothSerial.flush();
  blueToothSerial.print("\r\n+INQ=1\r\n");//make the master inquire
  Serial.println("Master is inquiring!");
  delay(2000); // This delay is required.
    
  //find the target slave
  char recvChar;
  while(1){
    if(blueToothSerial.available()){
      recvChar = blueToothSerial.read();
      recvBuf += recvChar;
      nameIndex = recvBuf.indexOf(slaveName);//get the position of slave name
      //nameIndex -= 1;//decrease the ';' in front of the slave name, to get the position of the end of the slave address
      if ( nameIndex != -1 ){
        //Serial.print(recvBuf);
    addrIndex = (recvBuf.indexOf(retSymb,(nameIndex - retSymb.length()- 18) ) + retSymb.length());//get the start position of slave address          
    slaveAddr = recvBuf.substring(addrIndex, nameIndex);//get the string of slave address          
    break;
      }
    }
  }
  //form the full connection command
  connectCmd += slaveAddr;
  connectCmd += "\r\n";
  int connectOK = 0;
  Serial.print("Connecting to slave:");
  Serial.print(slaveAddr);
  Serial.println(slaveName);
  //connecting the slave till they are connected
  do{
    blueToothSerial.print(connectCmd);//send connection command
    recvBuf = "";
    while(1){
      if(blueToothSerial.available()){
        recvChar = blueToothSerial.read();
    recvBuf += recvChar;
    if(recvBuf.indexOf("CONNECT:OK") != -1){
          connectOK = 1;
      Serial.println("Connected!");
      blueToothSerial.print("Connected!");
      break;
    }else if(recvBuf.indexOf("CONNECT:FAIL") != -1){
      Serial.println("Connect again!");
      break;
    }
      }
    }
  }while(0 == connectOK);
}