#include <LiquidCrystal_I2C.h>
#define PIN_TRIG 26
#define PIN_ECHO 25
#define LOWLED   18
#define MIDLED   19
#define HIGHLED  21
#define MOTOR    27

 unsigned int level = 0;
 LiquidCrystal_I2C lcd(0x27,16,2);
 void setup(){ 
{
  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;
  lcd.init();
  lcd.clear();
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("WATER TANK LEVEL");

if (level < 100){
  lcd.setCursor(0,1);
  lcd.print("VERY LOW");
}
else if ((level > 200) && (level<400))
{
  lcd.setCursor(0,1);
  lcd.print("MEDIUM");
}
else if (level >= 400 )
{
  lcd.setCursor(0,1);
  lcd.print("HIGH");
}




}
  pinMode(LOWLED,OUTPUT);
  pinMode(MIDLED,OUTPUT);
  pinMode(HIGHLED,OUTPUT);
  pinMode(MOTOR,OUTPUT);
  digitalWrite(LOWLED, HIGH);
  digitalWrite(MIDLED, HIGH);
  digitalWrite(HIGHLED, HIGH);
  digitalWrite(MOTOR, HIGH);

  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
 }

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(MIDLED, HIGH);
       digitalWrite(HIGHLED, HIGH);
       digitalWrite(MIDLED, HIGH);
       
  lcd.setCursor(0,1);
  lcd.print("HIGH");

}
else if ((level > 200) && (level<400))
{
       digitalWrite(LOWLED,HIGH);
       digitalWrite(HIGHLED, HIGH);
       digitalWrite(MIDLED, LOW);

  lcd.setCursor(0,1);
  lcd.print("MEDIUM");
}
else if (level >= 400 )
{
      digitalWrite(LOWLED,HIGH);
       digitalWrite(MIDLED,LOW);
       
  lcd.setCursor(0,1);
  lcd.print("VERY LOW");

}
delay(1000);
}