ArduinoSerialControl

#include <FastLED.h>

#define NUM_LEDS 5 //number of LEDs in the NeoPixel Strip
#define PIXEL_PIN 8 //Pin location of Neopixel input

//defining html colors used in p5 program 
//because of LED limitations, different colors were used to make 
//the neopixels appear similar to the screen color and were then 
//renamed to match html color names used in p5
#define LAVENDER_BLUSH CRGB::MediumOrchid;
#define LEMON_CHIFFON CRGB::Goldenrod; 
#define LAVENDER CRGB(102, 51, 153);
#define LIGHT_CYAN CRGB::CornflowerBlue;
#define LIGHT_PINK CRGB::HotPink; 
#define PALE_TURQUOISE CRGB::DarkTurquoise;
#define PINK CRGB::DeepPink; 
#define PLUM CRGB::Indigo;
#define POWDER_BLUE CRGB::SteelBlue;

// Define the array of leds
CRGB leds[NUM_LEDS];

const byte numChars = 32;
char receivedChars[numChars];
char tempChars[numChars]; // temporary array for use when parsing

//sets variables to be filled with 
int neoByte = 0;
int LEDByte = 0;

boolean newData = false; 

void setup() {

  Serial.begin(9600);
  
  FastLED.addLeds<NEOPIXEL, PIXEL_PIN>(leds, NUM_LEDS);  // declaring Neopixel strip to FastLED
  FastLED.setBrightness(20); //adjusting brightest of LEDs

  //declaring outputs
  pinMode(PIXEL_PIN, OUTPUT);
  
}

void loop() {

 //calls functions for output values
   recvWithStartEndMarkers();
    if (newData == true) {
        strcpy(tempChars, receivedChars);
        // this temporary copy is necessary to protect the original data
        //   because strtok() used in parseData() replaces the commas with \0
        parseData();
        LEDController();
        neoPixelController();   
        newData = false;
    }
    
  delay(10);   // delay in between reads for stability
}

void recvWithStartEndMarkers() {
    static boolean recvInProgress = false;
    static byte ndx = 0;
    char startMarker = '<';
    char endMarker = '>';
    char rc;

    while (Serial.available() > 0 && newData == false) {
        rc = Serial.read();

        if (recvInProgress == true) {
            if (rc != endMarker) {
                receivedChars[ndx] = rc;
                ndx++;
                if (ndx >= numChars) {
                    ndx = numChars - 1;
                }
            }
            else {
                receivedChars[ndx] = '\0'; // terminate the string
                recvInProgress = false;
                ndx = 0;
                newData = true;
            }
        }

        else if (rc == startMarker) {
            recvInProgress = true;
        }
    }
}

void parseData() {      // split the data into its parts
    
    char * strtokIndx; // this is used by strtok() as an index

    strtokIndx = strtok(tempChars,","); // reads the first char in index
    neoByte = atoi(strtokIndx);     // convert this part to an integer
 
    strtokIndx = strtok(NULL, ","); // this continues where the previous call left off
    LEDByte = atoi(strtokIndx);     // convert this part to an integer
}

//sets Neopixel color based on serial input
void neoPixelController(){

//  listens for incoming data
    if(Serial.available() > 0){

      //reads neoByte and sets LEDs to corresponsing color
      
     if (neoByte == 1) {  //LavenderBlush
      for (int i = 0; i < NUM_LEDS; i++) {        //itterates over each LED in array
        leds[i] = LAVENDER_BLUSH;                 //set each LED in array to CRGB Color Defined at top
          leds[i].r = dim8_video(leds[i].r);      // gamma correction function for more nuanced color output
          leds[i].g = dim8_video(leds[i].g);
          leds[i].b = dim8_video(leds[i].b);
        }
      } if (neoByte == 2) { //LemonChiffon
        for (int i = 0; i < NUM_LEDS; i++){
          leds[i] = LEMON_CHIFFON;                
            leds[i].r = dim8_video(leds[i].r);    
            leds[i].g = dim8_video(leds[i].g);
            leds[i].b = dim8_video(leds[i].b);
           }
      } else if (neoByte == 3) { //Lavender
        for (int i = 0; i < NUM_LEDS; i++) {
          leds[i] = LAVENDER;
            leds[i].r = dim8_video(leds[i].r);    
            leds[i].g = dim8_video(leds[i].g);
            leds[i].b = dim8_video(leds[i].b);
          }
      } else if (neoByte == 4) { //LightCyan
        for (int i = 0; i < NUM_LEDS; i++) {
           leds[i] = LIGHT_CYAN;
             leds[i].r = dim8_video(leds[i].r);    
             leds[i].g = dim8_video(leds[i].g);
             leds[i].b = dim8_video(leds[i].b);
          }
      } else if (neoByte == 5) {    //LightPink
        for (int i = 0; i < NUM_LEDS; i++) {
           leds[i] = LIGHT_PINK;
             leds[i].r = dim8_video(leds[i].r);    
             leds[i].g = dim8_video(leds[i].g);
             leds[i].b = dim8_video(leds[i].b);
          }
      } else if (neoByte == 6) {   //PaleTurquoise
         for (int i = 0; i < NUM_LEDS; i++) {
           leds[i] = PALE_TURQUOISE;
             leds[i].r = dim8_video(leds[i].r);    
             leds[i].g = dim8_video(leds[i].g);
             leds[i].b = dim8_video(leds[i].b);
           }
      } else if (neoByte == 7) {      //Pink
         for (int i = 0; i < NUM_LEDS; i++) {
           leds[i] = PINK;
             leds[i].r = dim8_video(leds[i].r);    
             leds[i].g = dim8_video(leds[i].g);
             leds[i].b = dim8_video(leds[i].b);
             } 
      } else if (neoByte == 8) {    // Plum
         for (int i = 0; i < NUM_LEDS; i++) {
           leds[i] = PLUM; 
             leds[i].r = dim8_video(leds[i].r);    
             leds[i].g = dim8_video(leds[i].g);
             leds[i].b = dim8_video(leds[i].b);
             }
      } else if (neoByte == 9) {  //PowderBlue
        for (int i = 0; i < NUM_LEDS; i++) {
           leds[i] = POWDER_BLUE;
             leds[i].r = dim8_video(leds[i].r);   
             leds[i].g = dim8_video(leds[i].g);
             leds[i].b = dim8_video(leds[i].b);
            }
      }

      //sets neopixels to the assigned values
      FastLED.show();
    //delay for stability   
    delay(1);
  } 
}

//sets which LEDs are on based on serial inputs
void LEDController(){
 
  //listen for incoming data
  if(Serial.available() > 0){

    //these statements read values that have already been delclared
    //in p5 based on on screen information and interpret those values
    //for the Arduino
    
    //if p5 ball is high on the screen, turn on top LEDs
    if(LEDByte == 1){
     digitalWrite(LEDR1,LOW);
     digitalWrite(LEDL1,LOW);

     digitalWrite(LEDR2,HIGH);
     digitalWrite(LEDR3,HIGH);
     digitalWrite(LEDL2,HIGH);
     digitalWrite(LEDL3, HIGH);
     
     //if p5ball is mid screen, turn on middle LEDs
    } else if(LEDByte == 2){
     digitalWrite(LEDL2, LOW);
     digitalWrite(LEDR2, LOW);
     
     digitalWrite(LEDL3, HIGH);
     digitalWrite(LEDR1, HIGH);
     digitalWrite(LEDR3, HIGH);
     digitalWrite(LEDL1, HIGH);

     //if p5b ball is low in the screen, turn on bottom LEDs
    } else if(LEDByte == 3){
     digitalWrite(LEDR3, LOW);
     digitalWrite(LEDL3, LOW);

     digitalWrite(LEDR1, HIGH);
     digitalWrite(LEDR2, HIGH);
     digitalWrite(LEDL1, HIGH);
     digitalWrite(LEDL2, HIGH);
    }

    delay(1); //delay inbetween readings for stability 
  }
}