#define BLYNK_TEMPLATE_ID "TMPL35iNtk_vm"
#define BLYNK_TEMPLATE_NAME "Water level monitoring"
#define BLYNK_AUTH_TOKEN "tBdWUxQWdppKwuvJXkDgvF2_wexAodZa"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
//Initialize the LCD display
LiquidCrystal_I2C lcd(0x27, 16, 2);

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";//Enter your WIFI name
char pass[] = "";//Enter your WIFI password
BlynkTimer timer;

// Define the component pins
#define trig 4
#define echo 2
#define LED1 25
#define LED2 26
#define LED3 27
#define LED4 14
#define LED5 12
#define relay 13


//Enter your tank max value(CM)
int MaxLevel =120;

int Level1 = 100;
int Level2 = 80;
int Level3 = 60;
int Level4 = 40;
int Level5 = 20;

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);

  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
  pinMode(relay, OUTPUT);
  digitalWrite(relay, HIGH);
  Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);

  lcd.setCursor(0, 0);
  lcd.print("Water level");
  lcd.setCursor(4, 1);
  lcd.print("Monitoring");
  delay(4000);
  lcd.clear();

  //Call the functions
  timer.setInterval(100L, ultrasonic);
}

//Get the ultrasonic sensor values
void ultrasonic() {
  digitalWrite(trig, LOW);
  delayMicroseconds(4);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  long t = pulseIn(echo, HIGH);
  int distance = t / 29 / 2;

  int blynkDistance = (distance - MaxLevel) * -1;
  if (distance <= MaxLevel) {
    Blynk.virtualWrite(V0, blynkDistance);
  } else {
    Blynk.virtualWrite(V0, 0);
  }
  lcd.setCursor(0, 0);
  lcd.print("WLevel:");
  if (Level1 <= distance) {
    lcd.setCursor(8, 0);
    lcd.print("Very Low");
    lcd.setCursor(0, 1);
    lcd.print("Motor is ON ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
    digitalWrite(LED5, LOW);
    digitalWrite(relay, HIGH);
    Blynk.virtualWrite(V1, HIGH);
  } else if (Level2 <= distance && Level1 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("Low");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
    digitalWrite(LED5, LOW);
  } else if (Level3 <= distance && Level2 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("Medium");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, LOW);
    digitalWrite(LED5, LOW);
  } else if (Level4 <= distance && Level3 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("High");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, HIGH);
    digitalWrite(LED5, LOW);
  } else if (Level5 >= distance) {
    lcd.setCursor(8, 0);
    lcd.print("Full");
    lcd.print("      ");
    lcd.setCursor(0, 1);
    lcd.print("Motor is OFF");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, HIGH);
    digitalWrite(LED5, HIGH);
    digitalWrite(relay, LOW);
    Blynk.virtualWrite(V1, LOW);
  }
}
void loop() {
  Blynk.run();//Run the Blynk library
  timer.run();//Run the Blynk timer
}