/* Water Level Detector
   Sensor: XKC-Y25-V
   The LED lights up when water is detected. LCD display sends a text warning.
   Pinout:
   Sensor --> Arduino
   Signal --> pin6
   -------LCD---------
   SDA    --> A4
   SCL    --> A5  
*/
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 16, 2);

int sensorPinL = 5;    // Signal of sensor level --> pin 5 (Low level)
int sensorPinH = 6;    // Signal of sensor level --> pin 6 (High level)
int ledPin =  13;      // The number of the LED pin
int statusSensorL=0;   // Saves the sensor Low level status
int statusSensorH=0;   // Saves the sensor High level status
int waterPump = 4;     // Water pump

void setup() {
  lcd.init();
  lcd.backlight();    //Turn on the backlight
  lcd.setCursor(0, 0);       // Go to column 0, row 0
  lcd.print("Tank Level Control");
  lcd.setCursor(0, 1);       // Go to column 0, row 1
  lcd.print("Fabacademy 2022");
  pinMode(waterPump, OUTPUT);       
  pinMode(sensorPinL, INPUT);
  pinMode(sensorPinH, INPUT);
  pinMode(ledPin, OUTPUT);  
  digitalWrite(ledPin, LOW); //Initially the pump is turned off
  digitalWrite(waterPump, LOW);
  delay(2000);
  lcd.clear();
}

void loop() {
  statusSensorL = digitalRead(sensorPinL);
  statusSensorH = digitalRead(sensorPinH);
  lcd.setCursor (0, 0);
  if (statusSensorL == LOW) {     
    digitalWrite(ledPin, HIGH);
    digitalWrite(waterPump, HIGH);  
    lcd.print("Without water");
    lcd.setCursor (0, 1);
    lcd.print("waterPump : ON ");
  } 
  if (statusSensorH == HIGH) {
    digitalWrite(ledPin, LOW);
    digitalWrite(waterPump, LOW);
    lcd.print("With water");
    lcd.setCursor (0, 1);
    lcd.print("waterPump : OFF");
  }
  delay(100);
}