// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

byte incoming[5];
byte index = 0;

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(6 , OUTPUT);
  pinMode(9 , OUTPUT);
  pinMode(10 , OUTPUT);

}

void loop() {
  // Wait for byte
  if (Serial.available() > 0) {
    // If not last byte
    if (index !=4) {
      incoming[index] = Serial.read();
      index++;
      led();
    } else {
      // Last byte, check if FF
      byte last = Serial.read();
      if (last == 0xFF) {
        // Write to screen
        render();
      } // Else do nothing
      index = 0; // Reset index
    }
  }
}

void led(){
  if (incoming[1] <= 60){
  analogWrite(6, 0);
  analogWrite(9, 125);
  analogWrite(10, 0);
 }else if(incoming[1] > 60 && incoming[1] <80){
  analogWrite(6, 125);
  analogWrite(9, 125);
  analogWrite(10, 0);
 }else if(incoming[1] >= 80 && incoming[1] <85){
  analogWrite(6, 255);
  analogWrite(9, 0);
  analogWrite(10, 0);
 }else if(incoming[1] >= 85){
  analogWrite(6, 255);
  analogWrite(9, 0);
  analogWrite(10, 0);
  delay(150);
  analogWrite(6, 0);
  delay(150);
  analogWrite(6, 255);
 }
}
void render(){
 lcd.clear();
 lcd.home();
 lcd.print("CPU:");
 lcd.print(incoming[0], DEC);
 lcd.print("C");
 lcd.setCursor(9,0);
 lcd.print("Max:");
 lcd.print(incoming[1], DEC);
 lcd.print("C");
 lcd.setCursor(0, 1);
 lcd.print("GPU:");
 lcd.print(incoming[2], DEC);
 lcd.print("C");
 lcd.setCursor(9,1);
 lcd.print("RAM:");
 lcd.print(incoming[3], DEC);
 lcd.print("%");
}
void standby(){
lcd.autoscroll();
lcd.setCursor(16, 0);
lcd.print("W");
delay(500);
lcd.print("a");
delay(500);
lcd.print("i");
delay(500);
lcd.print("t");
delay(500);
lcd.print("i");
delay(500);
lcd.print("n");
delay(500);
lcd.print("g");
delay(500);
lcd.print(" ");
delay(500);
lcd.print("f");
delay(500);
lcd.print("o");
delay(500);
lcd.print("r");
delay(500);
lcd.print(" ");
delay(500);
lcd.print("i");
delay(500);
lcd.print("n");
delay(500);
lcd.print("p");
delay(500);
lcd.print("u");
delay(500);
lcd.print("t");
delay(500);
lcd.print("~");
lcd.noAutoscroll();
delay(500);
lcd.clear();

}