Bluetooth serial connection

Projects Networking, Protocols, and Devices
1

Hi everyone,

I was able to send information over Bluetooth serial port from my PC (Linux Xubuntu) to Arduino Uno. However if I want to send something from Arduino to PC then it doesn't work.

Here is my very simple Arduino sketch that can receive commands "F" - switch off diode, "T" - switch on diode or "B" - blink diode. It also supposed to send "Hellow World!" text to other Bluetooth device (in this case my PC). Last part didn't work.

char val;
int ledpin = 13;
boolean blink = true;

void setup() {
  pinMode(ledpin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  if(Serial.available())
  {
    val = Serial.read();
  }
  if( val == 'T' ) {
    digitalWrite(ledpin, HIGH);
    blink = false;
  }
  else if (val == 'F') { 
    digitalWrite(ledpin, LOW);
    blink = false;
  }
  else if (val == 'B' || blink == true) {
    blink = true;
    digitalWrite(ledpin, !digitalRead(ledpin));
  }
  Serial.println("Hello world!");
  delay(1000);
}

Then from Linux console I can establish connection:

user@user-laptop:~$ sudo rfcomm connect 0 00:0E:0E:00:7F:32
Connected /dev/rfcomm0 to 00:0E:0E:00:7F:32 on channel 1
Press CTRL-C for hangup

after that I use CuteCom to look what is going on, I can not see "Hello world!" beign received, however I can send commands to Arduino without problem:

Any idea?