/* Bluetooth duplex
adapted from Tom Igoe's serial_duplex code

Sends a character (single byte) out the serial port to a blueSMIRF device, every 300ms,
listens for bytes received, and displays their CHAR value

Created 21 October 2006
*/

import processing.serial.*;

// the serial port:
Serial port;

// variable to hold keystoke values:
int thisByte = -1;

// incoming serial data:
int whichKey = -1;

// font for printing:
PFont fontA;

void setup() {
  // window size:
  size(200, 200);

  // load and prep fonts to print to window.
  // use Tools -->Create Font... to make your own font.
  fontA = loadFont("CourierNewPSMT-48.vlw");
  textFont(fontA, 24);

  // list all the available serial ports:
  println(Serial.list());

  // choose the appropriate serial port from the list - #2 is the com port on my computer
  // for the BlueSMIRF chip i've paired to
  port = new Serial(this, Serial.list()[2], 9600);

}
  

void draw() {
  background(0);
  text("Received: " + char(thisByte), 10, 130);
  text("Sent: " + char(whichKey), 10, 100);
  // if there are bytes available in the input buffer,
  // read them and print them:
 
  while (port.available() > 0) {
    thisByte = port.read();
  }
}

void keyPressed() {
  // send the keystroke out:
  char tosend = char(key);
  
  port.write(tosend+"\r");
  
  
  println("sent "+tosend);
  whichKey = key;
}