/*
  Ce sketch reprend en partie les éléments de :

  Arduino Starter Kit example
  Project 4  - Color Mixing Lamp

  This sketch is written to accompany Project 3 in the
  Arduino Starter Kit

  Parts required:
  1 RGB LED
  3 220 ohm resistors

  Created 13 September 2012
  Modified 14 November 2012
  by Scott Fitzgerald
  Thanks to Federico Vanzati for improvements

  http://www.arduino.cc/starterKit

  This example code is part of the public domain

  Modifiée par Christophe BOBILLE - juin 2017
*/

const int redLEDPin = 9;      // LED connected to digital pin 9
const int greenLEDPin = 10;   // LED connected to digital pin 10
const int blueLEDPin = 11;    // LED connected to digital pin 11

int redValue; // value to write to the red LED
int greenValue; // value to write to the green LED
int blueValue; // value to write to the blue LED

char msgString[12]; // Tableau qui va recevoir les caractères envoyés
char response[24];  // Tableau qui va recevoir les caractères de la reponse
//

void process (char *msgString) {
  int r, v, b;
  sscanf(msgString, "%d%d%d", &r, &v, &b);

  analogWrite(redLEDPin, r);
  analogWrite(greenLEDPin, v);
  analogWrite(blueLEDPin, b);

  snprintf(response, sizeof(response), "%d - %d - %d\n", r, v, b);
  Serial.print(response);
}

void setup() {
  Serial.begin(115200);
  // set the digital pins as outputs
  pinMode(greenLEDPin, OUTPUT);
  pinMode(redLEDPin, OUTPUT);
  pinMode(blueLEDPin, OUTPUT);
}

void loop() {
  char c;
  while (Serial.available()) {
    c = Serial.read();
    if (c == '<') {               // Caractère délimiteur de début de message
      sprintf(msgString, "");
    }
    else if (c == '>')  {         // Caractère délimiteur de fin de message
      process(msgString);
    }
    else {                        // Caractères du message
      sprintf(msgString, "%s%c", msgString, c);
    }
  }
}