#include <Keypad.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);
int kdelay = 50;
int period = 0;
int LED=13;
const int trigPin = 11;
const int echoPin = 10;
long duration;
int distanceCm, distanceInch;
int cursorColumn = 0;

const byte ROWS = 4;
const byte COLS = 4;
char BufNum[8];
char hexaKeys[COLS][ROWS] =
{
  { '1','4','7','*' },
  { '2','5','8','0' },
  { '3','6','9','#' },
  { 'A','B','C','D' }
};
byte rowPins[ROWS] = { 5, 4, 3, 2 };
byte colPins[COLS] = { 9, 8, 7, 6 };
Keypad kpd = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

String v1;
String v2;
void setup() 
{
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() 
{  
   //v1 = GetNumber();
   //int Val = v1.toInt();
   lcd.setCursor(0,0);
   lcd.print("Setlevel:");
   lcd.setCursor(0,1);
   lcd.print("Water level:");
   lcd.setCursor(0,2);
   lcd.print("Humidity:");
   //lcd.setCursor(0,3);
   //lcd.print("Motor stt:"); 
   //lcd.setCursor(12,2);
   //lcd.print(Val);
//========================================================================
   digitalWrite(trigPin, LOW);
   delayMicroseconds(2);
   digitalWrite(trigPin, HIGH);
   delayMicroseconds(11);
   digitalWrite(trigPin, LOW);
   duration = pulseIn(echoPin, HIGH);
   distanceCm = duration * 0.034 / 2;
   distanceInch = duration * 0.0133 / 2;
   lcd.setCursor(12,1);  
   lcd.print(distanceCm); 
   lcd.print(" cm");
   delay(10);
//========================================================================
   if (distanceCm<100)
   {
      digitalWrite(LED,HIGH);
   }
   else
   {
      digitalWrite(LED,LOW);
   }
//========================================================================
char key = kpd.getKey();
  if (key)
  {
    lcd.setCursor(cursorColumn,0); // move cursor to   (cursorColumn, 0)
    lcd.print(key);                 // print key at (cursorColumn, 0)
    cursorColumn++;                 // move cursor to next position
    if(cursorColumn == 4) 
    {     
      lcd.clear();
      cursorColumn = 0;
    }
  }
}
//========================================================================
/*String GetNumber()
{
   String num;
   char key = kpd.getKey();
   lcd.setCursor(0,0);
   lcd.print("Setlevel:");
   while(key != '#')
   {
      switch (key)
      {
         case NO_KEY:
            break;

         case '0': case '1': case '2': case '3': case '4':
         case '5': case '6': case '7': case '8': case '9':
            lcd.print(key);
            num = num +key;
            break;

         case '*':
            num = "";
            lcd.clear();
            break;
      }
      key = kpd.getKey();      
   }
   return num;
}*/
//========================================================================