#include <Wire.h>
#include <Servo.h> 
#include <LiquidCrystal_I2C.h>

Servo myservo; 
#include <DHT.h>;
#define DHTPIN 5   
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE); 
int RED =  11;

LiquidCrystal_I2C lcd(0x27, 16, 2);

int hmd;  
int tmp; 
int ptmpin = 0;  
int val; 
int ledval=0; 
const int switchPin = 2; // switch for blue led
int switchState = 0; 


void setup()
{
  Serial.begin(9600);
  myservo.attach(7);
  myservo.attach(7);
  pinMode(RED, OUTPUT);
  dht.begin();
  digitalWrite(RED, LOW);
  pinMode(switchPin, INPUT);
  lcd.init();
  lcd.begin(16,2);
  lcd.backlight();
}

void loop()
{
      // On
  switchState = digitalRead(switchPin);
  if(switchState==LOW){
    switchState = 1; 
      digitalWrite(RED, HIGH);
      Serial.println("IGNITION ON");
      Serial.println('\n');
      lcd.setCursor(0, 1);
      lcd.print("IGNITION: ON "); 
      lcdon();
      th();
      // temperature
      val = analogRead(ptmpin);            
      val = map(val, 0, 1023, 0, 180);   
      if(tmp <= 25 && hmd <= 50 && val == 0){
          // Servo spins forward at full speed for 1 second.
      myservo.write(180);
      delay(500);
      myservo.write(0);
 
      // potentiometer
      val = analogRead(ptmpin);            
      val = map(val, 0, 1023, 0, 180);    
      if (val != 0) {
      myservo.write(val);
      delay(15);
      }
      else {
        myservo.write(0);
        th();
        delay(500);
      }
      }
      else{
            // potentiometer
          val = analogRead(ptmpin);            
          val = map(val, 0, 1023, 0, 180);    
          if (val != 0) {
          myservo.write(val);
          delay(15);
          }
          else {
          myservo.write(0);
          th();
          delay(500);
          }
      } 
  }
  // Off
  else if (switchState==HIGH){
    switchState = 0; 
    digitalWrite(RED, LOW);
    Serial.println("IGNITION OFF");
    lcd.setCursor(0, 1);
    lcd.print("IGNITION: OFF"); 
       // potentiometer
      val = analogRead(ptmpin);           
      val = map(val, 0, 1023, 0, 180);     
      myservo.write(val); 
  }
}
  
void th(){
  hmd = dht.readHumidity();
  tmp= dht.readTemperature();
   }

void lcdon(){
 
  lcd.setCursor(0, 0);
  lcd.print("Temp:");
  lcd.setCursor(9, 0);
  lcd.print("Hum: ");
  lcd.setCursor(5, 0);
  lcd.print(tmp);
  lcd.setCursor(13, 0);
  lcd.print(hmd);
  lcd.setCursor(15, 0);
  lcd.print("%");
}