arduino processing and bluetooth

Using Arduino Interfacing w/ Software on the Computer
1

Hello!

I am having issues getting data from arduino to processing through a hc-06 bluetooth module.
In this case I am just trying to get simple data across.

arduino code:

 int i=0;
        
        void setup()
        {
          Serial.begin(9600);
          
        }
        
        void loop()
        {
         Serial.write(i);
        
        i++;
        
        delay(200);
        
        if(i>255){
          
         i=0; 
        }
          
    }

processing code:

  import processing.serial.*;
        
        Serial myPort;
        
        int val=0;
        
        void setup()
        {
          println(Serial.list());
        
          String portName = Serial.list()[1];
        
          myPort = new Serial(this, portName, 9600);
          
        }
        
        
        
        void draw(){
          if ( myPort.available() > 0) {  
        
            val = myPort.read(); 
        
           println(val);
        
          delay(100); 
        
          }
          
          
        }

I recognized and added the HC-06 module on my laptop, and it created 2 (?) com ports, in my case 6 and 7. My arduino is listed as COM 3. When I print the available coms, I only get 3 and 7. When I select 3, I get the data but its through the cable, when I select 7 I get nothing.

Wiring:
vcc - 3.3v
grnd - grnd
tx- rx
rx - tx

Help is much appreciated!

2

Wiring:
vcc - 3.3v
grnd - grnd
tx- rx
rx - tx

Try connecting the bluetooth device to some other pins. Then, you can use SoftwareSerial to read from/write to the bluetooth device, and Serial to read from/write to the Serial Monitor application or other application on the PC. Don't disable the Serial instance by using it to talk to the bluetooth device.

3

Try connecting the other bluetooth port using below code:

String portName = Serial.list()[2];

or directly use this code ( without these code println(Serial.list()); String portName = Serial.list()[1]; )

myPort = new Serial(this, COM7, 9600);

4