Arduino Sallama Çay Makinesi

// Proje Hocam - Cay Makinesi
#include <LiquidCrystal_I2C.h>
#include <Servo.h> 
#include <Wire.h> 
 
LiquidCrystal_I2C lcd(0x3f, 16, 2);
Servo servoMotor; 
 
int screenLED = 6;
int servoPin = 7;
int startButton = 8;
int buzzer = 9;
int teaPot = A0;  
 
boolean diagnosticBit = LOW;
 
int timer = 0;
int oldTimer = 0;
boolean inProcess = LOW;
int servoHighPosition = 120;
int servoMidPosition = 100;
int servoLowPosition = 70;
int servoSpeed = 35;
long idleTime = 0;
 
void setup() {
  pinMode(screenLED, OUTPUT);
  pinMode(servoPin, OUTPUT);
  pinMode(startButton, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);
   
  Serial.begin(9600);
   
  servoMotor.attach(servoPin);
  servoMotor.write(servoHighPosition);
     
  if (!diagnosticBit){
    tone(buzzer, 1000, 200);
  }
   
  Serial.println("Sistem Tamam");
  lcd.begin();  
  lcd.backlight();
  lcd.print("Cay Makinesi");
  lcd.setCursor(0, 1);
  lcd.print("Proje Hocam");
  fadeLightOn(screenLED);
  clearScreen();
  if (!diagnosticBit){
    tone(buzzer, 1000, 200);
  }
  updateIdleTime();
}
 
void loop() {
  if (idleTime < millis()){
    fadeLightOff(screenLED);
    idleTime = 2147483647;
  }
   
  if (diagnosticBit && millis()%1000 == 0){
    Serial.println(idleTime);
    Serial.println(millis());
    Serial.println("");
  }
   
  if (millis() % 30 == 0){
    oldTimer = timer;
    timer = rawToTime(analogRead(teaPot));
     
    if (oldTimer != timer){
      lcd.setCursor(0, 0);
      lcd.print(teaName(rawToTime(analogRead(teaPot))));
       
       
      lcd.setCursor(3, 1);
      lcd.print(timeString(0));
       
      lcd.setCursor(8, 1);
      lcd.print(timeString(timer));
       
      delay(300);
      updateIdleTime();
    }
  }
   
  if (!digitalRead(startButton)){
    inProcess = HIGH;
    Serial.println("Start Button is pressed");
    // Move servo to low position to dunk tea (0-179)
    servoMotor.write(servoLowPosition);
    updateIdleTime();
    delay(300);
  }
   
  if (inProcess == HIGH){
    Serial.println("inProcess is HIGH");
    for (int i = 0; i < timer; i++){
      lcd.setCursor(3, 1);
      lcd.print(timeString(i));
      delay(1000);
    }
    
    for (int i = servoLowPosition; i < servoHighPosition; i++){
      servoMotor.write(i);
      delay(servoSpeed);
    }
    for (int i = 0; i < 3; i ++){
      servoMotor.write(servoHighPosition);
      delay(200);
      if (!diagnosticBit){
        tone(buzzer, 1000, 100);
      }
      servoMotor.write(servoMidPosition);
      delay(servoLowPosition);
    }
    servoMotor.write(servoHighPosition);
    updateIdleTime();
    inProcess = LOW;
  }
}