#include <LiquidCrystal.h> //lcd library
#define echopin 9          
#define trigpin 8
#define autopin A0 //auto switch pin
#define manupin A1 //manual switch pin
#define dryout A2  //dryprotection pin
int relaypin = 10; //output relay pin  
int buzzerpin = 11; //output buzzer pin 


byte all[8] = {
  0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111
};


LiquidCrystal lcd(7, 6, 5, 4, 3, 2); //lcd pins


void setup(){
 lcd.begin(16, 2);
 Serial.begin(9600);
 lcd.createChar(0, all);

 lcd.setCursor(0,0);
  for (int j=0; j<2; j++)
  for (int i=0; i<16; i++){
  lcd.setCursor (i,j);
  lcd.write(byte(0));
  delay(100);
  
}


lcd.clear();

delay(100);
    
  lcd.begin(16, 2);
  lcd.setCursor(0,0);
  lcd.print("*WELCOME TO JSK*");
  delay(3000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("AUTOMATIC WATER");
  lcd.setCursor(0,1);
  lcd.print("PUMP CONTROLLER");
  delay(3000);
  lcd.clear();
  Serial.begin(9600);
 

  
  pinMode(echopin, INPUT_PULLUP);
  pinMode(trigpin, OUTPUT);
  pinMode(relaypin, OUTPUT); //set relay pin as output
  pinMode(buzzerpin, OUTPUT); //set buzzer pin as output
  pinMode(autopin, INPUT); //auto switch pin as input
  pinMode(manupin, INPUT); //auto switch pin as input
  pinMode(dryout, INPUT); //dry out switch pin as input

  digitalWrite(echopin,HIGH);
  

  
}


void loop(){


  digitalWrite(trigpin,LOW);
  delayMicroseconds(2);
  digitalWrite(trigpin,HIGH);
  delayMicroseconds(20);
  digitalWrite(trigpin,LOW);
  

int distance = pulseIn(echopin,HIGH,26000);
  distance=distance/58;
  
 

distance = map(distance,20,110, 100, 0); //cm to percentage
  

  lcd.setCursor(12,1);
  lcd.print(distance); //percentage value print on lcd
  lcd.print("%");
  delay(1000); 
  lcd.clear();
  lcd.setCursor(1,1);
  lcd.print("TANK LEVEL=");
                  
  
  if(distance <= 25 && 
     digitalRead(autopin) == HIGH && 
     digitalRead(manupin) == LOW &&
     digitalRead(dryout) == HIGH)
     digitalWrite(relaypin,HIGH);

  if(distance <= 25 && 
     digitalRead(autopin) == HIGH && 
     digitalRead(manupin) == LOW &&
     digitalRead(dryout) == LOW)
     digitalWrite(relaypin,LOW); 

  if(distance >= 100 && 
     digitalRead(autopin) == HIGH &&
     digitalRead(manupin) == LOW)
     digitalWrite(relaypin,LOW);

  if(digitalRead(autopin) == HIGH && 
     digitalRead(manupin) == LOW &&
     digitalRead(relaypin) == HIGH && 
     digitalRead(dryout) == LOW) 
     digitalWrite(relaypin,LOW);

  if(digitalRead(manupin) == HIGH && 
     digitalRead(autopin) == LOW &&
     digitalRead(relaypin) == LOW && 
     digitalRead(dryout) == HIGH) 
     digitalWrite(relaypin,HIGH);
  
  if(digitalRead(manupin) == HIGH &&
     digitalRead(autopin) == LOW && 
     digitalRead(relaypin) == HIGH && 
     digitalRead(dryout) == LOW) 
     digitalWrite(relaypin,LOW);

  if(digitalRead(autopin) == LOW && 
     digitalRead(manupin) == LOW) 
     digitalWrite(relaypin,LOW);

  if(digitalRead(dryout) == LOW) 
     digitalWrite(relaypin,LOW);

  if(digitalRead(autopin) == HIGH && 
     digitalRead(manupin) == HIGH)
     digitalWrite(relaypin,LOW);

 
  lcd.setCursor(0,0);
  if(digitalRead(autopin) == HIGH && digitalRead(manupin) == LOW)
  lcd.print("AUTO");

  if(digitalRead(autopin) == LOW && digitalRead(manupin) == HIGH)
  lcd.print("MANUAL");
  
  if(digitalRead(autopin) == LOW && digitalRead(manupin) == LOW)
  lcd.print("OFF");

  if(digitalRead(autopin) == HIGH && digitalRead(manupin) == HIGH)
  lcd.print("ERROR!!!");


 
  lcd.setCursor(8,0);
  if (digitalRead(relaypin) == LOW)
  { 
   lcd.print("PUMP=OFF"); 
  }
     
  else {
    lcd.print("PUMP=ON");
  }
 

    if (digitalRead(dryout) == LOW)
    {  
      digitalWrite(relaypin,LOW);
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("THE WELL IS LOW");
      digitalWrite(buzzerpin,HIGH);
      delay(1000);
      digitalWrite(buzzerpin,LOW);
      delay(1000);
      lcd.clear();

    } 

    
  
}