#define BLYNK_TEMPLATE_ID "TMPL3O5iQbbNI"
#define BLYNK_TEMPLATE_NAME "CATTLE MONITORING SYSTEM"
#define BLYNK_AUTH_TOKEN "CjHz09Kc9K0i-XTyMwdMiCiqhX08fouF"
#include "LiquidCrystal_I2C.h"
#include "DHT.h"
#include <ESP32Servo.h>
#include <BlynkSimpleEsp32.h>
// Pin Definitions
#define TRIGGER_PIN 2
#define ECHO_PIN 4
#define LED1 18
#define POTENTIOMETER_PIN 35
#define led2 5
#define led3 25
char auth[] = "CjHz09Kc9K0i-XTyMwdMiCiqhX08fouF";

//Enter your WIFI SSID and password
char ssid[] = "Wokwi-GUEST";
char pass[] = "";


// Servo Authentication Token
Servo servo;

// Variables
double humidity;
double temperature;
double dist;
int potValue;

// LCD Display
LiquidCrystal_I2C lcd_1(0x27, 20, 4);

// DHT Sensor
DHT dht14(14, DHT22);

// Function to Measure Ultrasonic Distance
double fnc_ultrasonic_distance(int _t, int _e) {
  unsigned long dur = 0;
  digitalWrite(_t, LOW);
  delayMicroseconds(5);
  digitalWrite(_t, HIGH);
  delayMicroseconds(10);
  digitalWrite(_t, LOW);
  dur = pulseIn(_e, HIGH, 18000);
  if (dur == 0) return 999.0;
  return (dur / 58.0);  // Convert microseconds to centimeters
}

// Setup Function
void setup() {
  // Pin Modes
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(POTENTIOMETER_PIN, INPUT);
  pinMode(LED1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  // Servo Setup
  servo.attach(15);

  // Serial Communication Setup
  Serial.begin(115200);
  Serial.flush();
  while (Serial.available() > 0) Serial.read();

  // DHT Sensor Setup
  dht14.begin();

  // LCD Display Setup
  lcd_1.init();
  lcd_1.noCursor();
  lcd_1.backlight();
  Blynk.begin(auth, ssid, pass);
}

// Loop Function
void loop() {
  // Ultrasonic Distance Measurement
  dist = fnc_ultrasonic_distance(TRIGGER_PIN, ECHO_PIN);
  if (dist > 17) {
    digitalWrite(LED1, HIGH);
    lcd_1.setCursor(0, 1);
    lcd_1.print(String("Pump: ON"));
  } else {
    digitalWrite(LED1, LOW);
    lcd_1.setCursor(0, 1);
    lcd_1.print(String("Pump: off"));
  }

  // DHT Sensor Readings
  humidity = dht14.readHumidity();
  temperature = dht14.readTemperature();

  // Temperature Control with LEDs
  if (temperature > 25) {
    Blynk.virtualWrite(V4,HIGH);
    Blynk.virtualWrite(V0, temperature);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    servo.write(0);
  } else {
    if ((temperature >= 20) && (temperature < 25)) {
      Blynk.virtualWrite(V4,LOW);
      Blynk.virtualWrite(V0, temperature);
      digitalWrite(led2, LOW);
      digitalWrite(led3, LOW);
      servo.write(0);
    } else {
      servo.write(180); 
      Blynk.virtualWrite(V3,HIGH);
      Blynk.virtualWrite(V0, temperature);
      lcd_1.setCursor(0, 5);
      lcd_1.print("Servo: ON");
      digitalWrite(led2, LOW);
      digitalWrite(led3, LOW);
    }
  }

  // Humidity Control with LEDs
  if (humidity > 80) {
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    servo.write(0);
    Blynk.virtualWrite(V4,HIGH);
    Blynk.virtualWrite(V1, humidity);
  } else {
    if ((humidity >= 60) && (humidity < 80)) {
      digitalWrite(led2, LOW);
      digitalWrite(led3, LOW);
      servo.write(0);
      Blynk.virtualWrite(V4,LOW);
      Blynk.virtualWrite(V1, humidity);
    } else {
      servo.write(180); 
      lcd_1.setCursor(0, 5);
      lcd_1.print("Servo: ON");
      digitalWrite(led2, LOW);
      digitalWrite(led3, LOW);
      Blynk.virtualWrite(V3,HIGH);
      Blynk.virtualWrite(V1, humidity);

    }
  }

  // Display Temperature
  lcd_1.setCursor(0, 0);
  lcd_1.print("T: ");
  lcd_1.print(temperature);
  lcd_1.print(" C ");
  lcd_1.setCursor(0, 2);
  lcd_1.print("H: ");
  lcd_1.print(humidity);
  lcd_1.print(" %  ");

  // Simulated Soil Moisture using Potentiometer
  potValue = analogRead(POTENTIOMETER_PIN);
  int moistureThreshold = map(potValue, 0, 1023, 0, 100);

  // Display Soil Moisture
  lcd_1.setCursor(4, 4);
  lcd_1.print("S: ");
  lcd_1.print(moistureThreshold);
  lcd_1.print("%");

  // Condition for Servo based on Soil Moisture
  if (moistureThreshold < 60) {
    servo.write(180); // Turn on servo when soil moisture is less than 60%
    lcd_1.setCursor(0, 5);
    lcd_1.print("Servo: ON");
    Blynk.virtualWrite(V3,HIGH);
    Blynk.virtualWrite(V2, moistureThreshold);
  } else {
    servo.write(0); // Turn off servo otherwise
    lcd_1.setCursor(0, 5);
    lcd_1.print("Servo: OFF");
    Blynk.virtualWrite(V3,LOW);
    Blynk.virtualWrite(V2, moistureThreshold);
  }

	 Blynk.run();
    // Envoie les données à Blynk	
		
}