#define BLYNK_TEMPLATE_ID "TMPL6qvRIdbLQ"
#define BLYNK_TEMPLATE_NAME "water tank level"
#define BLYNK_AUTH_TOKEN "zZ7D4clzmHwC5bi1h9Y5_uldAcrFcJyF"

#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
#define BLYNK_PRINT Serial
#include <NewPing.h> 

LiquidCrystal_I2C lcd(0x27, 16, 2);

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

#define trig 2
#define echo 15
#define LED1 12
#define LED2 13
#define LED3 14

#define relay 4


int MaxLevel = 100;

int Level1 = (MaxLevel * 75) / 100;
int Level2 = (MaxLevel * 65) / 100;
int Level3 = (MaxLevel * 55) / 100;
int Level4 = (MaxLevel * 45) / 100;
int Level5 = (MaxLevel * 35) / 100;

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(relay, OUTPUT);
  digitalWrite(relay, HIGH);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  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");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);

  } else if (Level2 <= distance && Level1 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("Low");
    lcd.print("      ");
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);


  } else if (Level3 <= distance && Level2 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("Medium");
    lcd.print("      ");
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, LOW);


  } else if (Level4 <= distance && Level3 > distance) {
    lcd.setCursor(8, 0);
    lcd.print("High");
    lcd.print("      ");
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, HIGH);

    
  } else if (Level5 >= distance) {
    lcd.setCursor(8, 0);
    lcd.print("Full");
    lcd.print("      ");
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, HIGH);

    delay(10000);
    digitalWrite(relay, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("MESIN AIR OFF");
      // Matikan relay
  }
}

//Get the button value
BLYNK_WRITE(V1) {
  bool Relay = param.asInt();
  if (Relay == 1) {
    digitalWrite(relay, LOW);
    lcd.setCursor(0, 1);
    lcd.print("MESIN AIR ON ");
  } else {
    digitalWrite(relay, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("MESIN AIR OFF");
  }
}

void loop() {
  Blynk.run();
  timer.run();
}