#include <LiquidCrystal_I2C.h>

#define BUZZER_PIN 17
#define BUZZER_CHANNEL 0
#define pirpin 5

int val =0;
bool motionState = false;

int trigPin = 18;
int echoPin = 19;
int LedPinR = 8;
int LedPinG = 5;
 
LiquidCrystal_I2C lcd(0x27, 16, 2);
 
void setup() {
  
pinMode(LedPinR, OUTPUT);
pinMode(LedPinG, OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(17, OUTPUT);
pinMode(12, OUTPUT);
pinMode(27, OUTPUT);
pinMode(5, OUTPUT);
ledcSetup(BUZZER_CHANNEL, 500, 8);
ledcAttachPin(BUZZER_PIN, BUZZER_CHANNEL);

lcd.init(); 
lcd.backlight();
 
Serial.begin(9600);
Serial.print("Distance from the object :\n");
}
void loop() 
{ 
int distance;
int duration;
 val = digitalRead(5);
 if(val==HIGH)
  {
    digitalWrite(27, HIGH);
    digitalWrite(12, LOW);
    ledcWriteTone(BUZZER_CHANNEL,900);
    delay(100);
    ledcWriteTone(BUZZER_CHANNEL,300);
    delay(100);
    if (motionState == false)
  {
    Serial.println("Motion Sensor Detected!");
    motionState = true ;
  }
digitalWrite(trigPin, LOW);
delayMicroseconds(10);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
 
duration=pulseIn(echoPin,HIGH);
distance = duration * 0.0344/2;
 
Serial.print("DISTANCE : ");
Serial.println(distance);
 
lcd.clear();
lcd.setCursor(0,0);
lcd.print("ROOM NUMBER...");
lcd.setCursor(0,1);
lcd.print(distance);
}
else
{
  digitalWrite(27, LOW);
  digitalWrite(12, HIGH);
  ledcWriteTone(BUZZER_CHANNEL,0);
  delay(100);

  if (motionState == true)
  {
    Serial.println("Motion Ended!");
    motionState = false;
  }
}
}