#include <DHT.h>
#define LDR_PIN 19
const int dhtPin = 27;
byte sensorPin = 2;
DHT dht(dhtPin, DHT22);
#include <LiquidCrystal.h>
LiquidCrystal lcd(18, 5, 17, 16, 4, 0);
const int triggerPin = 12;
const int echoPin = 14;
byte buzzerpin = 25;
byte ledpin=18;


void setup() {
  Serial.begin(115200);
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT_PULLUP);
  pinMode(sensorPin, INPUT);
  pinMode(buzzerpin, OUTPUT);
   pinMode(LDR_PIN, INPUT);
   pinMode(ledpin, OUTPUT);
  // pinMode(dhtpin, INPUT_PULLUP);
  lcd.begin(20, 4);
  // lcd.print("Distance Example");
  dht.begin();
  delay(1000);
}
void loop() {
  // Trigger the ultrasonic sensor
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  // Measure the echo time
  float duration = pulseIn(echoPin, HIGH);

  float distance = duration * 0.034 / 2;
  //float humidity = dht.readHumidity();
  //Serial.println(humidity);
  // Read temperature as Celsius (the default)
  float temperature = dht.readTemperature();
  Serial.println(temperature);
  int sensorValue = digitalRead(sensorPin);
  Serial.println(sensorValue);
  if (sensorValue == HIGH)
  {
    digitalWrite(buzzerpin, HIGH);
    Serial.println("motion detected...");
    lcd.setCursor(0, 2);
    lcd.print("motion detected");
  }
  else {
    digitalWrite(buzzerpin, LOW);
    Serial.println("motion not detected..");
    lcd.setCursor(0, 2);
    lcd.print("motion false");
  }
  if (digitalRead(LDR_PIN) == LOW) {
    Serial.println("Light!");
    digitalWrite(ledpin, LOW);
    lcd.setCursor(0,3);
    lcd.print("light mode");
  } else {
    digitalWrite(ledpin, HIGH);
    Serial.println("Dark ");
    lcd.setCursor(0,3);
    lcd.print("dark mode");
  }



  lcd.setCursor(0, 0);
  lcd.print("temperature :"  + String(temperature) + char(223) + "c"); //(char)223 = degree symbol

  lcd.setCursor(0, 1);
  lcd.print("Distance: " + String(distance, 0) + " cm");
  delay(1000);
}