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/* ==================================================================================================================================================
         Project: 5 min tutorial: Send Hex from computer to Arduino
          Author: Scott C
         Created: 21th June 2015
     Arduino IDE: 1.6.4
         Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
     Description: Arduino Sketch used to adjust the brightness of an LED based on the values received
                  on the serial port. The LED needs to be connected to a PWM pin. In this sketch
                  Pin 10 is used, however you could use Pin 3, 5, 6, 9, or 11 - if you are using an Arduino Uno.
===================================================================================================================================================== */

byte byteRead;                   //Variable used to store the byte received on the Serial Port
int ledPin = 10;                 //LED is connected to Arduino Pin 10. This pin must be PWM capable.  

void setup() {
 Serial.begin(9600);             //Initialise Serial communication with the computer
 pinMode(ledPin, OUTPUT);        //Set Pin 10 as an Output pin
 byteRead = 0;                   //Initialise the byteRead variable to zero.
}

void loop() {
  if(Serial.available()) {
    byteRead = Serial.read();     //Update the byteRead variable with the Hex value received on the Serial COM port.
  }
  
  analogWrite(ledPin, byteRead);  //Use PWM to adjust the brightness of the LED. Brightness is determined by the "byteRead" variable.
}    

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/* ==================================================================================================================================================
         Project: 5 min tutorial: Send Hex from computer to Arduino
          Author: Scott C
         Created: 21th June 2015
  Processing IDE: 2.2.1
         Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
     Description: Processing Sketch used to send HEX values from computer to Arduino when the mouse is pressed.
                  The alternating values 0xFF and 0x00 are sent to the Arduino Uno to turn an LED on and off.
                  You can send any HEX value from 0x00 to 0xFF. This sketch also shows how to convert Hex strings
                  to Hex numbers.
===================================================================================================================================================== */

import processing.serial.*;           //This import statement is required for  Serial communication

Serial comPort;                       //comPort is used to write Hex values to the Arduino
boolean toggle = false;               //toggle variable is used to control which hex variable to send  
String zeroHex = "00";                //This "00" string will be converted to 0x00 and sent to Arduino to turn LED off.
String FFHex = "FF";                  //This "FF" string will be converted to 0xFF and sent to Arduino to turn LED on.

void setup(){
    comPort = new Serial(this, Serial.list()[0], 9600);   //initialise the COM port for serial communication at a baud rate of 9600.
    delay(2000);                      //this delay allows the com port to initialise properly before initiating any communication.
    background(0);                    //Start with a black background.
    
}


void draw(){                           //the draw() function is necessary for the sketch to compile 
    //do nothing here                  //even though it does nothing.
}


void mousePressed(){                   //This function is called when the mouse is pressed within the Processing window.
  toggle = ! toggle;                   //The toggle variable will change back and forth between "true" and "false"
  if(toggle){                          //If the toggle variable is TRUE, then send 0xFF to the Arduino
     comPort.write(unhex(FFHex));      //The unhex() function converts the "FF" string to 0xFF
     background(0,0,255);              //Change the background colour to blue as a visual indication of a button press.
  } else {
    comPort.write(unhex(zeroHex));     //If the toggle variable is FALSE, then send 0x00 to the Arduino
    background(0);                     //Change the background colour to black as a visual indication of a button press.
  }
}
    

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/* ==================================================================================================================================================
         Project: 5 min tutorial: Send Hex from computer to Arduino
          Author: Scott C
         Created: 21th June 2015
     Arduino IDE: 1.6.4
         Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
     Description: Arduino Sketch used to adjust the brightness of an LED based on the values received
                  on the serial port. The LED needs to be connected to a PWM pin. In this sketch
                  Pin 10 is used, however you could use Pin 3, 5, 6, 9, or 11 - if you are using an Arduino Uno.
===================================================================================================================================================== */

byte byteRead;                   //Variable used to store the byte received on the Serial Port
int ledPin = 10;                 //LED is connected to Arduino Pin 10. This pin must be PWM capable.  

void setup() {
 Serial.begin(9600);             //Initialise Serial communication with the computer
 pinMode(ledPin, OUTPUT);        //Set Pin 10 as an Output pin
 byteRead = 0;                   //Initialise the byteRead variable to zero.
}

void loop() {
  if(Serial.available()) {
    byteRead = Serial.read();     //Update the byteRead variable with the Hex value received on the Serial COM port.
  }
  
  analogWrite(ledPin, byteRead);  //Use PWM to adjust the brightness of the LED. Brightness is determined by the "byteRead" variable.
}    

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/* ==================================================================================================================================================
         Project: 5 min tutorial: Send Hex from computer to Arduino
          Author: Scott C
         Created: 21th June 2015
  Processing IDE: 2.2.1
         Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
     Description: Processing Sketch used to send HEX values from computer to Arduino when the mouse is pressed.
                  The alternating values 0xFF and 0x00 are sent to the Arduino Uno to turn an LED on and off.
                  You can send any HEX value from 0x00 to 0xFF. This sketch also shows how to convert Hex strings
                  to Hex numbers.
===================================================================================================================================================== */

import processing.serial.*;           //This import statement is required for  Serial communication

Serial comPort;                       //comPort is used to write Hex values to the Arduino
boolean toggle = false;               //toggle variable is used to control which hex variable to send  
String zeroHex = "00";                //This "00" string will be converted to 0x00 and sent to Arduino to turn LED off.
String FFHex = "FF";                  //This "FF" string will be converted to 0xFF and sent to Arduino to turn LED on.

void setup(){
    comPort = new Serial(this, Serial.list()[0], 9600);   //initialise the COM port for serial communication at a baud rate of 9600.
    delay(2000);                      //this delay allows the com port to initialise properly before initiating any communication.
    background(0);                    //Start with a black background.
    
}


void draw(){                           //the draw() function is necessary for the sketch to compile 
    //do nothing here                  //even though it does nothing.
}


void mousePressed(){                   //This function is called when the mouse is pressed within the Processing window.
  toggle = ! toggle;                   //The toggle variable will change back and forth between "true" and "false"
  if(toggle){                          //If the toggle variable is TRUE, then send 0xFF to the Arduino
     comPort.write(unhex(FFHex));      //The unhex() function converts the "FF" string to 0xFF
     background(0,0,255);              //Change the background colour to blue as a visual indication of a button press.
  } else {
    comPort.write(unhex(zeroHex));     //If the toggle variable is FALSE, then send 0x00 to the Arduino
    background(0);                     //Change the background colour to black as a visual indication of a button press.
  }
}