#define BLYNK_TEMPLATE_ID "TMPL6L6K22ysh"
#define BLYNK_TEMPLATE_NAME "AFS"
#define BLYNK_AUTH_TOKEN "lq4HILTkAzI90O5iE5XGe8ubvyyxmZRF"

#define BLYNK_PRINT Serial

#define MAX_DISTANCE 50  // Define the maximum sensor range in cm
#define FULL_DISTANCE 3 
#define Buzzer 27
#define LED_LOW 13
#define LED_AVE 14
#define LED_HIGH 5
#define LED_FULL 4
#define LED_EMPTY 12

#include <WiFi.h>
#include <WiFiClient.h>
//#include <BlynkSimpleEsp32.h>
#include <BlynkSimpleEsp32_SSL.h>
#include <Ultrasonic.h>
#include <LiquidCrystal_I2C.h>

int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows); 

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

Ultrasonic ultrasonic(18, 19);  //Trig 12 Echo 14
int distance;

int RELAY_PIN = 32;


//DHT22
#include <DHT.h>
#define DHT_SENSOR_PIN  15 // ESP32 pin GPIO21 connected to DHT22 sensor
#define DHT_SENSOR_TYPE DHT22

DHT dht_sensor(DHT_SENSOR_PIN, DHT_SENSOR_TYPE);
//DHT22 END

//HX711
#include <HX711_ADC.h>
#if defined(ESP8266)|| defined(ESP32) || defined(AVR)
#include <EEPROM.h>
#endif

const int HX711_dout = 2; 
const int HX711_sck = 16; 

HX711_ADC LoadCell(HX711_dout, HX711_sck);

const int calVal_eepromAdress = 0;
unsigned long t = 0;
//HX711 END

//LDR
const int LDR = 34; 
const int LED = 17;
int input_val = 0;
//LDR END

BlynkTimer timer;
void myTimerEvent()
{  
}

void setup()
{

  // Debug console
  Serial.begin(115200);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  timer.setInterval(1000L, myTimerEvent);


  pinMode(Buzzer, OUTPUT);
  pinMode(LED_EMPTY, OUTPUT);
  pinMode(LED_LOW, OUTPUT);
  pinMode(LED_AVE, OUTPUT);
  pinMode(LED_HIGH, OUTPUT);
  pinMode(LED_FULL, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  lcd.init();
  lcd.backlight();

  
  //HX711
  Serial.begin(57600); delay(10);
  Serial.println();
  Serial.println("Starting...");

  LoadCell.begin();
  
  float calibrationValue; 
  calibrationValue = 4.20;
  #if defined(ESP8266)|| defined(ESP32)
  
#endif
  

  unsigned long stabilizingtime = 2000; 
  boolean _tare = true; 
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag()) {
    Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
    while (1);
  }
  else {
    LoadCell.setCalFactor(calibrationValue); 
    Serial.println("Startup is complete");
  }

  //HX711 END
  
  //LDR 
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  //LDR END


  //DHT22 
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  dht_sensor.begin();
  //DHT22 END




}

void loop()
{
  //Blynk.run();

  distance = ultrasonic.read();
  // Calculate the water level percentage
  int waterLevelPercentage = map(distance, FULL_DISTANCE, MAX_DISTANCE, 100, 0);
  waterLevelPercentage = constrain(waterLevelPercentage, 0, 100);  // Ensure it stays within 0-100%
  Serial.print("Distance in CM: ");
  Serial.println(distance);
  Blynk.virtualWrite(V2, 52 - distance);

  Serial.print(waterLevelPercentage);
  Serial.println("%");
  //Blynk.virtualWrite(V0, waterLevelPercentage);
   lcd.setCursor(0, 0);
  lcd.print("Wat Lvl: ");
lcd.print(waterLevelPercentage);
lcd.print(" %");

  if (waterLevelPercentage <= 30){
    digitalWrite(Buzzer, HIGH);
    Serial.println("Buzzer ON!");
  }else {
    digitalWrite(Buzzer, LOW);
  }

  if (waterLevelPercentage <= 50){
    digitalWrite(RELAY_PIN, HIGH);
    Serial.println("Water Pump ON!");
  }else {
    digitalWrite(RELAY_PIN, LOW);
  }

  if (waterLevelPercentage < 9){
    Serial.println("Water is EMPTY");
    //Blynk.logEvent("water_alert", " Water tank is EMPTY! ");
    digitalWrite(LED_EMPTY, HIGH);
     digitalWrite(LED_LOW, HIGH);
      digitalWrite(LED_AVE, LOW);
       digitalWrite(LED_HIGH, LOW);
        digitalWrite(LED_FULL, LOW);
        lcd.setCursor(0, 1);
  lcd.print("Status: ");
lcd.print("EMPTY");

  }else if (waterLevelPercentage >= 10 && waterLevelPercentage <= 40){
    
    Serial.println("Water is LOW");
    //Blynk.logEvent("water_alert", " Water tank is LOW! ");
    digitalWrite(LED_EMPTY, LOW);
     digitalWrite(LED_LOW, HIGH);
      digitalWrite(LED_AVE, LOW);
       digitalWrite(LED_HIGH, LOW);
        digitalWrite(LED_FULL, LOW);
        lcd.setCursor(0, 1);
  lcd.print("Status: ");
lcd.print("LOW");

  }else if (waterLevelPercentage >= 31 && waterLevelPercentage <= 75 ){
    
    Serial.println("Water is Average");
    digitalWrite(LED_EMPTY, LOW);
      digitalWrite(LED_LOW, LOW);
        digitalWrite(LED_AVE, HIGH);
          digitalWrite(LED_HIGH, LOW);
            digitalWrite(LED_FULL, LOW);
            lcd.setCursor(0, 1);
  lcd.print("Status: ");
lcd.print("Average");  

    }else if (waterLevelPercentage >= 76 && waterLevelPercentage <= 90 ){
      
    Serial.println("Water is High");
    digitalWrite(LED_EMPTY, LOW);
      digitalWrite(LED_LOW, LOW);
        digitalWrite(LED_AVE, LOW);
          digitalWrite(LED_HIGH, HIGH);
            digitalWrite(LED_FULL, LOW);
            lcd.setCursor(0, 1);
  lcd.print("Status: ");
lcd.print("High");  

    }else {
      
    Serial.println("Water is FULL");
     //Blynk.logEvent("water_alert", " Water tank is FULL! ");
     digitalWrite(LED_EMPTY, LOW);
      digitalWrite(LED_LOW, LOW);
        digitalWrite(LED_AVE, LOW);
         digitalWrite(LED_HIGH, HIGH);
          digitalWrite(LED_FULL, HIGH);
          lcd.setCursor(0, 1);
  lcd.print("Status: ");
lcd.print("FULL");
  }

  delay(200);
  

  
  //HX711

  static boolean newDataReady = 0;
  const int serialPrintInterval = 0; 

   if (LoadCell.update()) newDataReady = true;

  
  if (newDataReady) {
    if (millis() > t + serialPrintInterval) {
      float i = LoadCell.getData();
      Serial.print("Load_cell output val in Kg: ");
      Serial.println(i/100);
      newDataReady = 0;
      t = millis();
      Blynk.virtualWrite(V3,  i/ 100);
    }
  }
  
  delay(200);

  //HX711 END

  //LDR
    input_val = analogRead(LDR);
  delay(1000);
  if(input_val>800)
  {
    digitalWrite(LED,HIGH);
    Serial.print("\n");
    Serial.print ("LDR value is :");
    Serial.println(input_val);
    
    Serial.print ("Lights : ON  ");
    Serial.print("\n");
     
    Blynk.virtualWrite(V4, "ON");
    delay(200);
  }
  else
  {
    digitalWrite(LED,LOW);
    Serial.print("\n");
    Serial.print ("LDR value is :");
    Serial.println(input_val);
    
    Serial.print ("Lights : OFF  ");
    Serial.print("\n");

    Blynk.virtualWrite(V4, "OFF");
    delay(200);
  }
  //LDR END


  //DHT22
  float tempC = dht_sensor.readTemperature();
  float tempF = dht_sensor.readTemperature(true);
  float humVal = dht_sensor.readHumidity();

  Serial.print("Temperatur: ");
  Serial.print(tempC);
  Serial.print("°C | ");
  Serial.print(tempF);
  Serial.println(" F ");

  
  Serial.print("Humidity: ");
  Serial.print(humVal);
  Serial.println(" %");
  Serial.println("-----------------------------------");
 
   
  //DHT22 END

  lcd.clear();

  //Teperature blynk
  Blynk.virtualWrite(V0, tempC);
  
  delay(1000);
  
  Blynk.run();
  timer.run(); // Initiates BlynkTimer
}