#include <DHT.h>
#include <LiquidCrystal.h>
#include <Stepper.h>
#include <Servo.h>

#define DHTPIN 24      
#define DHTTYPE DHT22 
#define TRIG_PIN 51    
#define ECHO_PIN 53   
#define LED_PIN 6     

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

Stepper myStepper1(stepsPerRevolution, 8, 10, 9, 11);
Stepper myStepper2(stepsPerRevolution, 7,5,6,4);
Servo servo;
void setup() {
  Serial.begin(9600);
  dht.begin();

  lcd.begin(16, 2); 
  stepper1.setSpeed(10);
  stepper2.setSpeed(10);
  servo.attach(23);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  float humidity = dht.readHumidity();
  float temp = dht.readTemperature();
  static int displayMode = 0; 
  lcd.clear();
  if (displayMode == 0) {
    lcd.print("Temp: ");
    lcd.print(temp);
    lcd.print(" C");
  } else {
    lcd.print("Humidity: ");
    lcd.print(humidity);
    lcd.print(" %");
  }
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  long distance = duration * 0.034 / 2;
  if (distance < 20) {
    stepper1.step(-100);
    stepper2.step(100);
  } else {
    stepper1.step(100);
    stepper2.step(100); 
    digitalWrite(LED_PIN, LOW);
  }
}