Synchronizing arduino to Razer Chroma

day10.ino

#include <Arduino.h>

#define R 11
#define G 10
#define B 9

String read;

String getMessage() {
  return Serial.readStringUntil('|');
}

struct RGB {
  byte r;
  byte g;
  byte b;
  bool valid = false;
};

void writeRGB(int r_v, int g_v, int b_v) {
  analogWrite(R, r_v);
  analogWrite(G, g_v);
  analogWrite(B, b_v);
}

void writeRGB(const RGB *rgb) {
  analogWrite(R, rgb->r);
  analogWrite(G, rgb->g);
  analogWrite(B, rgb->b);
}

bool initConnection() {
  String t = getMessage();
  if (t.length() > 0) {
    Serial.print("2560");
    return true;
  }
  return false;
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);
  writeRGB(125, 0, 0);
}

const RGB parseRGB(const String& string) {
  RGB rgb;
  String processing = string.substring(1);
  int index = processing.indexOf('-');
  String part = processing.substring(0, index);
  processing = processing.substring(index+1);
  rgb.r = part.toInt();
  index = processing.indexOf('-');
  part = processing.substring(0, index);
  processing = processing.substring(index+1);
  rgb.g = part.toInt();
  index = processing.indexOf('|');
  part = processing.substring(0,index);
  rgb.b = part.toInt();
  rgb.valid = true;
  return rgb;
}

const RGB parseRGB() {
  String t = getMessage();
  if (t.length() > 0) {
    return parseRGB(t);
  } else {
    return RGB();
  }
}

bool initFinshed = false;
void loop() {
  if (!initFinshed) {
    initFinshed = initConnection();
    if (initFinshed) {
      writeRGB(0, 125, 0);
    }
  } else {
    RGB rgb = parseRGB();
    if (rgb.valid) {
      writeRGB(&rgb);
    }
  }
}