Bluetooth Cont.

Ok so I've been messing with bluetooth for the last few days and have consequently been bashing my head against the keyboard.

I wanted to be able to program the Arduino through the bluetooth bee wirelessly, but I'm not sure that it's actually possible.  I'll have to try a few more things yet.

Useful resources I have found are

DFRobot bluetooth bee wiki (kind of lacking)
DFRobot bluetooth bee PDF specsheet (extremely useful)

To test everything out I did the following.  Upload this sketch to the Arduino.


char val = 'e';

void setup(){
  Serial.begin(38400);
  Serial.write("AT+UART=38400,0,0\r\n");
  Serial.write("AT+ROLE=0");
}

void loop(){
}

This will set the bluetooth module into a slave mode and the baud rate to 38400.  I disconnected the FTDI cable and plugged the Bluetooth bee in.  I flicked the switch on the bee to "AT Mode", this allows it to be programmed.  I then plugged in the battery, waited 5 seconds, and unplugged it.  I removed the Bee and plugged the FTDI cable back in.

I then uploaded this sketch.


char val = 'e';

void setup(){
  Serial.begin(38400);
  digitalWrite(13, LOW);
}

void loop(){
  if(Serial.available() > 0){
      val = Serial.read();
      if(val == 'H'){
          digitalWrite(13, HIGH);
      }
      if(val == 'L'){
          digitalWrite(13, LOW);
      }
  }
  delay(250);
  Serial.write("loop\r\n");
}

I unplugged the FTDI, and plugged in the Bee.  I flicked the switch off of "AT Mode" and plugged the battery in.

I then clicked on the bluetooth icon on my computer and selected "add a new device", the bluetooth bee was listed.  Clicking on it, I selected pair with this device using a code.  The default code for this bluetooth device is "1234".  Once connected I right clicked on it and selected properties.  This will give you the COM # you need to talk to the device.

I opened putty from the radio buttons I selected serial.  I entered COM4 and 38400.  Clicked open.

Bam, now when I hit H the led comes on, L and it goes off.