Bluetooth Communication

hello new here   

i little experienced programming , elctronics.

i hope can me project.
i want set simple communication tablet , arduino via bluetooth.

it working far, tablet finds blutooth module can send , recieve commands , answeres , arduino.

my goal turn on , off led string commands.

when send commands via usb-serial arduino working well, when send same command via bluetooth code not working.

here code:

code: [select]



string command;
char input;
boolean led;
// variable receive data serial port
int ledpin = 8; // led connected pin 48 (on-board led)
void setup() {
  pinmode(ledpin, output);  // pin 48 (on-board led) output
  serial.begin(9600);       // start serial communication @ 9600bps
}
void loop() {
  readcommand();
  if(command.equals(".")){
    led=true;
  }
  else if(command.equals("-")){
    led=false;
  }
  serial.print("arduino executing command: ");
  serial.println(command);
 
  if(led==true){
    digitalwrite(ledpin,high);
  }
  else if(led==false){
    digitalwrite(ledpin,low);
  }
  serial.println("command executed");
}

void readcommand(){
  command="";
  while(serial.available()==0){}
  serial.flush();
  command="";
  while(serial.available()==0){}
  while(serial.available()>0){
    input=serial.read();
    command+=string(input);
    delay(1);
  }
  serial.print("arduino revieved command: ");
  serial.println(command);
}


when send commande via usb serial output:
arduino revieved command: .
arduino executing command: .
command executed

arduino revieved command: -
arduino executing command: -
command executed

i same output when send command via bluetooth led doesnt turn on.


i happy every suggestion

ok solved problem,

i used integer based commands instead of string based.

kann tell me why stringcomparison operiation wrong in code above?

code: [select]


if(command.equals("comparestring"){
     //do somthing
}


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