#include <LiquidCrystal.h>

#define PIN_TRIG 26
#define PIN_ECHO 25
#define LOWLED   18
#define MIDLED   19
#define HIGHLED  21

unsigned int level = 0;

// Initialize the LCD display with the number of columns and rows
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // Adjust the pin numbers as per your wiring

void setup() {
  pinMode(LOWLED,OUTPUT);
  pinMode(MIDLED,OUTPUT);
  pinMode(HIGHLED,OUTPUT);
  digitalWrite(LOWLED,HIGH);
  digitalWrite(MIDLED,HIGH);
  digitalWrite(HIGHLED,HIGH);
  
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  
  // Initialize the LCD display with the number of columns and rows
  lcd.begin(16, 2);
}

void loop() {
  // Start a new measurement:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read the result:
  int duration = pulseIn(PIN_ECHO, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(duration / 58);
  Serial.print("Distance in inches: ");
  Serial.println(duration / 148);
  
  level = duration / 58;

  if (level < 100)
  {
    digitalWrite(LOWLED, LOW);
    digitalWrite(HIGHLED, HIGH);
    digitalWrite(MIDLED, HIGH);
    lcd.clear(); // Clear the LCD screen
    lcd.setCursor(0, 0); // Set cursor to the first row
    lcd.print("Low level"); // Display the message
  }
  else if ((level > 200) && (level < 400))
  {
    digitalWrite(LOWLED, HIGH);
    digitalWrite(HIGHLED, HIGH);
    digitalWrite(MIDLED, LOW);
    lcd.clear(); // Clear the LCD screen
    lcd.setCursor(0, 0); // Set cursor to the first row
    lcd.print("Mid level"); // Display the message
  }
  else if (level >= 400 )
  {
    digitalWrite(HIGHLED, LOW);
    digitalWrite(MIDLED, HIGH);
    digitalWrite(LOWLED, HIGH);
    lcd.clear(); // Clear the LCD screen
    lcd.setCursor(0, 0); // Set cursor to the first row
    lcd.print("High level"); // Display the message
  }
  delay(1000);
}