#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
LiquidCrystal_I2C lcd(0x27,16,2);
//
const int echoPin= 11 ;
const int triggerPin=12;
long duration ;
int distance;
//
int mine;
int maxe;
//
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {9,8 ,7 ,6 };
byte colPins[COLS] = {5,4,3 ,2 };
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);


void setup() {
  // put your setup code here, to run once:
  lcd.begin(16,2);
  lcd.setCursor(0,0);
  lcd.print("bouzelof ");
  delay(2000);
  lcd.clear();
  //
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT);
  // get the first number from the keypad
  lcd.setCursor(0,1);

  // نقوم بادخال الحد الادنى وهو المسافة بين الحساس والماء
  lcd.clear();
  lcd.print("enter the min");
  lcd.setCursor(0,1);
  char key = keypad.waitForKey();
  while (key != '#') {
    if (key >= '0' && key <= '9') {
      mine= mine * 10 + (key - '0');
      
      lcd.print(key);
    }
    key = keypad.waitForKey();
  }
  //
  lcd.clear();
  lcd.print("enter the max");
  // نقوم بادخال الحد الاعلى وهو المسافة الصغيرة بين الحساس والماء
  lcd.setCursor(0,1);
  key = keypad.waitForKey();
  while (key != '#') {
    if (key >= '0' && key <= '9') {
      maxe=maxe* 10 + (key - '0');
     
      lcd.print(key);
    }
    key = keypad.waitForKey();
  }
  
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin,HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin,LOW);
  duration=pulseIn(echoPin,HIGH);
  distance=duration*0.034/2;
  lcd.clear();
  //
  if (distance>=mine) {
    
    digitalWrite(10, HIGH);
    

  }
  if (distance<=maxe){
    digitalWrite(10, LOW);
   
    
  }
  if(digitalRead(10)==HIGH  ){
    lcd.setCursor(0,1);
    lcd.print("pompe: ON");
  }if(digitalRead(10)==LOW ){
    lcd.setCursor(0,1);
    lcd.print("pompe: OFF");
  }
  delay(1000);



}