// write a program to interface the ultrasonic sensor with esp32 to display the distance on serial monitor
// 12212644

#include <LiquidCrystal_I2C.h>

#define TRIG 15
#define ECHO 19

LiquidCrystal_I2C lcd(0x27, 16, 2);

float distance = 0;
long duration = 0;

void setup() {
  // put your setup code here, to run once:
  lcd.init();

  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
  Serial.begin(115200);
}

void loop() {
  digitalWrite(TRIG, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG, LOW);
  
  duration = pulseIn(ECHO, HIGH);
  distance = (0.034 * duration) / 2;

  // lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Distance: ");
  lcd.print(distance);

  Serial.print("Distance: ");
  Serial.println(distance);

  delay(10);
}