#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL4UHNFFAtK"
#define BLYNK_TEMPLATE_NAME "Smart Irrigation System"
#define BLYNK_AUTH_TOKEN "ZvwoCJIF3vdfntf_Cf0DU5G8pcDtp6zY"

#include <LiquidCrystal_I2C.h>
#include <DHT_U.h>
#include <ESP32Servo.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Pin definitions
#define DHTPIN 4
#define DHTTYPE DHT22
#define SOIL_MOISTURE_PIN 34
#define RELAY_PIN 18
#define LED_PIN_GREEN 2
#define LED_PIN_RED 23
#define SERVO_PIN 5

// Threshold for soil moisture (adjust as necessary)
const int moistureThreshold = 2000;

// Components
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2); // Address 0x27, 16 columns and 2 rows
Servo waterPump;

// Blynk Virtual Pins
#define VPIN_TEMP V2
#define VPIN_HUMIDITY V0
#define VPIN_SOIL_MOISTURE V1
#define VPIN_RELAY V3
#define VPIN_LED_RED V4

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);
  
  // Initialize DHT Sensor
  dht.begin();
  
  // Initialize LCD
  lcd.begin(16, 2); // 16 columns and 2 rows
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Smart Irrigation Sys");
  
  // Initialize Servo
  waterPump.attach(SERVO_PIN);
  waterPump.write(0); // Initial position
  
  // Initialize pins
  pinMode(SOIL_MOISTURE_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN_GREEN, OUTPUT);
  pinMode(LED_PIN_RED, OUTPUT);
  
  // Deactivate relay initially
  digitalWrite(RELAY_PIN, HIGH);
  
  // Connect to WiFi and Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, "Wokwi-GUEST", "");
}

void startWatering() {
  waterPump.write(90); // Assume 90 degrees is the pumping position
  lcd.setCursor(0, 1);
  lcd.print("Watering ON...");
}

void stopWatering() {
  waterPump.write(0); // Assume 0 degrees is the off position
  lcd.setCursor(0, 1);
  lcd.print("Watering OFF...");
}

BLYNK_WRITE(VPIN_RELAY) {
  int relayState = param.asInt(); // Get the value from the app (0 or 1)
  
  if (relayState == 1) {
    startWatering();
  } else {
    stopWatering();
  }
}

// This function will be called every time the V4 switch is toggled
BLYNK_WRITE(VPIN_LED_RED) {
  int switchState = param.asInt(); // Get the state of the switch (0 or 1)
  
  // Control the LED based on the switch state
  if (switchState == 1) {
    digitalWrite(LED_PIN_RED, HIGH); // Turn LED on
  } else {
    digitalWrite(LED_PIN_RED, LOW); // Turn LED off
  }
}

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

  // Read sensor values
  int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  // Display sensor readings on LCD
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C Hum: ");
  lcd.print(humidity);
  lcd.print("%");
  
  // Send sensor readings to Blynk
  Blynk.virtualWrite(VPIN_TEMP, temperature);
  Blynk.virtualWrite(VPIN_HUMIDITY, humidity);
  Blynk.virtualWrite(VPIN_SOIL_MOISTURE, soilMoistureValue);
  
  // Automatic watering based on soil moisture
  if (soilMoistureValue < moistureThreshold && digitalRead(RELAY_PIN) == HIGH) {
    digitalWrite(RELAY_PIN, LOW);
    Blynk.virtualWrite(V3, HIGH); // Activate relay for automatic watering
    startWatering();
  } else if (soilMoistureValue >= moistureThreshold && digitalRead(RELAY_PIN) == LOW) {
    digitalWrite(RELAY_PIN, HIGH);
    Blynk.virtualWrite(V3, LOW); // Deactivate relay
    stopWatering();
  }

  // LED indicator for watering status
  if (soilMoistureValue < moistureThreshold) {
    digitalWrite(LED_PIN_GREEN, HIGH);
  } else {
    digitalWrite(LED_PIN_GREEN, LOW);
  }

  // Add a small delay to avoid overwhelming the ESP32
  delay(2000);
}


























// // Automatic watering based on soil moisture
  // if (soilMoistureValue < moistureThreshold) {
  //   digitalWrite(RELAY_PIN, LOW); // Activate relay for automatic watering
  //   startWatering();
  // } else {
  //   digitalWrite(RELAY_PIN, HIGH); // Deactivate relay
  //   stopWatering();
  // }







// #define BLYNK_PRINT Serial

// #define BLYNK_TEMPLATE_ID "TMPL4UHNFFAtK"
// #define BLYNK_TEMPLATE_NAME "Smart Irrigation System"
// #define BLYNK_AUTH_TOKEN "ZvwoCJIF3vdfntf_Cf0DU5G8pcDtp6zY"

// #include <LiquidCrystal_I2C.h>
// #include <DHT_U.h>
// #include <ESP32Servo.h>
// #include <WiFi.h>
// #include <WiFiClient.h>
// #include <BlynkSimpleEsp32.h>

// // Pin definitions
// #define DHTPIN 4
// #define DHTTYPE DHT22
// #define SOIL_MOISTURE_PIN 34
// #define RELAY_PIN 18
// #define LED_PIN 2
// #define SERVO_PIN 5
// #define POT_PIN 32  // Potentiometer pin

// // Threshold for soil moisture (adjust as necessary)
// const int moistureThreshold = 2000;

// // Components
// DHT dht(DHTPIN, DHTTYPE);
// LiquidCrystal_I2C lcd(0x27, 16, 2);
// Servo waterPump;

// // Blynk Virtual Pins
// #define VPIN_TEMP V2
// #define VPIN_HUMIDITY V0
// #define VPIN_SOIL_MOISTURE V1
// #define VPIN_RELAY V3

// // System state variable
// bool systemEnabled = false;
// int potThreshold = 2000;  // Adjust based on the range of the potentiometer

// void setup() {
//   // Initialize Serial Monitor
//   Serial.begin(115200);
  
//   // Initialize DHT Sensor
//   dht.begin();
  
//   // Initialize LCD
//   lcd.begin(16, 2);
//   lcd.init();
//   lcd.backlight();
//   lcd.setCursor(0, 0);
//   lcd.print("Smart Irrigation Sys");
  
//   // Initialize Servo
//   waterPump.attach(SERVO_PIN);
//   waterPump.write(0); // Initial position
  
//   // Initialize pins
//   pinMode(SOIL_MOISTURE_PIN, INPUT);
//   pinMode(RELAY_PIN, OUTPUT);
//   pinMode(LED_PIN, OUTPUT);
//   pinMode(POT_PIN, INPUT);  // Potentiometer pin
  
//   // Deactivate relay initially
//   digitalWrite(RELAY_PIN, HIGH);
  
//   // Connect to WiFi and Blynk
//   Blynk.begin(BLYNK_AUTH_TOKEN, "Wokwi-GUEST", "");
// }

// void startWatering() {
//   waterPump.write(90); // Assume 90 degrees is the pumping position
//   lcd.setCursor(0, 1);
//   lcd.print("Watering ON...");
// }

// void stopWatering() {
//   waterPump.write(0); // Assume 0 degrees is the off position
//   lcd.setCursor(0, 1);
//   lcd.print("Watering OFF...");
// }

// BLYNK_WRITE(VPIN_RELAY) {
//   int relayState = param.asInt(); // Get the value from the app (0 or 1)
  
//   if (relayState == 1) {
//     systemEnabled = true;
//     lcd.setCursor(0, 0);
  
//   } else {
//     systemEnabled = false;
//     stopWatering();  // Ensure the servo is off when the system is off
//     lcd.setCursor(0, 0);
    
//   }
// }

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

//   // Read the potentiometer value
//   int potValue = analogRead(POT_PIN);

//   // Determine system state based on the potentiometer value and Blynk switch
//   if (systemEnabled && potValue > potThreshold) {
//     systemEnabled = true;
//   } else if (potValue <= potThreshold) {
//     systemEnabled = false;
//   }

//   if (systemEnabled) {
//     // Read sensor values
//     int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);
//     float temperature = dht.readTemperature();
//     float humidity = dht.readHumidity();
    
//     // Display sensor readings on LCD
//     lcd.setCursor(0, 1);
//     lcd.print("Temp: ");
//     lcd.print(temperature);
//     lcd.print("C Hum: ");
//     lcd.print(humidity);
//     lcd.print("%");
    
//     // Send sensor readings to Blynk
//     Blynk.virtualWrite(VPIN_TEMP, temperature);
//     Blynk.virtualWrite(VPIN_HUMIDITY, humidity);
//     Blynk.virtualWrite(VPIN_SOIL_MOISTURE, soilMoistureValue);
    
//     // Automatic watering based on soil moisture
//     if (soilMoistureValue < moistureThreshold) {
//       digitalWrite(RELAY_PIN, LOW); // Activate relay for automatic watering
//       startWatering();
//     } else {
//       digitalWrite(RELAY_PIN, HIGH); // Deactivate relay
//       stopWatering();
//     }

//     // LED indicator for watering status
//     if (soilMoistureValue < moistureThreshold) {
//       digitalWrite(LED_PIN, HIGH);
//     } else {
//       digitalWrite(LED_PIN, LOW);
//     }
    
//     // Add a small delay to avoid overwhelming the ESP32
//     delay(2000);
//   } else {
//     // If the system is off, turn off the servo and LED
//     stopWatering();
//     digitalWrite(LED_PIN, LOW);
//     digitalWrite(RELAY_PIN, HIGH); // Ensure the relay is deactivated
//   }
// }





















// #define BLYNK_PRINT Serial

// #define BLYNK_TEMPLATE_ID "TMPL4UHNFFAtK"
// #define BLYNK_TEMPLATE_NAME "Smart Irrigation System"
// #define BLYNK_AUTH_TOKEN "ZvwoCJIF3vdfntf_Cf0DU5G8pcDtp6zY"

// #include <LiquidCrystal_I2C.h>
// #include <DHT_U.h>
// #include <ESP32Servo.h>
// #include <WiFi.h>
// #include <WiFiClient.h>
// #include <BlynkSimpleEsp32.h>

// // Pin definitions
// #define DHTPIN 4
// #define DHTTYPE DHT22
// #define SOIL_MOISTURE_PIN 34
// #define RELAY_PIN 18
// #define LED_PIN 2
// #define SERVO_PIN 5

// // Threshold for soil moisture (adjust as necessary)
// const int moistureThreshold = 2000;

// // Components
// DHT dht(DHTPIN, DHTTYPE);
// LiquidCrystal_I2C lcd(0x27, 16, 2);
// Servo waterPump;

// // Blynk Virtual Pins
// #define VPIN_TEMP V2
// #define VPIN_HUMIDITY V0
// #define VPIN_SOIL_MOISTURE V1
// #define VPIN_RELAY V3

// void setup() {
//   // Initialize Serial Monitor
//   Serial.begin(115200);
  
//   // Initialize DHT Sensor
//   dht.begin();
  
//   // Initialize LCD
//   lcd.begin(16, 2);
//   lcd.init();
//   lcd.backlight();
//   lcd.setCursor(0, 0);
//   lcd.print("Smart Irrigation Sys");
  
//   // Initialize Servo
//   waterPump.attach(SERVO_PIN);
//   waterPump.write(0); // Initial position
  
//   // Initialize pins
//   pinMode(SOIL_MOISTURE_PIN, INPUT);
//   pinMode(RELAY_PIN, OUTPUT);
//   pinMode(LED_PIN, OUTPUT);
  
//   // Deactivate relay initially
//   digitalWrite(RELAY_PIN, HIGH);
  
//   // Connect to WiFi and Blynk
//   Blynk.begin(BLYNK_AUTH_TOKEN, "Wokwi-GUEST", "");
// }

// void startWatering() {
//   waterPump.write(90); // Assume 90 degrees is the pumping position
//   lcd.setCursor(0, 1);
//   lcd.print("Watering ON...");
//   Blynk.virtualWrite(VPIN_RELAY, 1); // Update Blynk app
// }

// void stopWatering() {
//   waterPump.write(0); // Assume 0 degrees is the off position
//   lcd.setCursor(0, 1);
//   lcd.print("Watering OFF...");
//   Blynk.virtualWrite(VPIN_RELAY, 0); // Update Blynk app
// }

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

//   // Read sensor values
//   int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);
//   float temperature = dht.readTemperature();
//   float humidity = dht.readHumidity();
  
//   // Display sensor readings on LCD
//   lcd.setCursor(0, 1);
//   lcd.print("Temp: ");
//   lcd.print(temperature);
//   lcd.print("C Hum: ");
//   lcd.print(humidity);
//   lcd.print("%");
  
//   // Send sensor readings to Blynk
//   Blynk.virtualWrite(VPIN_TEMP, temperature);
//   Blynk.virtualWrite(VPIN_HUMIDITY, humidity);
//   Blynk.virtualWrite(VPIN_SOIL_MOISTURE, soilMoistureValue);
  
//   // Automatic watering based on soil moisture
//   if (soilMoistureValue < moistureThreshold) {
//     digitalWrite(RELAY_PIN, LOW); // Activate relay for automatic watering
//     startWatering();
//   } else {
//     digitalWrite(RELAY_PIN, HIGH); // Deactivate relay
//     stopWatering();
//   }

//   // LED indicator for watering status
//   if (soilMoistureValue < moistureThreshold) {
//     digitalWrite(LED_PIN, HIGH);
//   } else {
//     digitalWrite(LED_PIN, LOW);
//   }
  
//   // Add a small delay to avoid overwhelming the ESP32
//   delay(2000);
// }























// #define BLYNK_PRINT Serial

// #define BLYNK_TEMPLATE_ID "TMPL4UHNFFAtK"
// #define BLYNK_TEMPLATE_NAME "Smart Irrigation System"
// #define BLYNK_AUTH_TOKEN "ZvwoCJIF3vdfntf_Cf0DU5G8pcDtp6zY"

// #include <LiquidCrystal_I2C.h>
// #include <DHT_U.h>
// #include <ESP32Servo.h>
// #include <WiFi.h>
// #include <WiFiClient.h>
// #include <BlynkSimpleEsp32.h>

// // Pin definitions
// #define DHTPIN 4
// #define DHTTYPE DHT22
// #define SOIL_MOISTURE_PIN 34
// #define RELAY_PIN 18
// #define LED_PIN 2
// #define SERVO_PIN 5

// // Threshold for soil moisture (adjust as necessary)
// const int moistureThreshold = 2000;

// // Components
// DHT dht(DHTPIN, DHTTYPE);
// LiquidCrystal_I2C lcd(0x27, 16, 2);
// Servo waterPump;

// void setup() {
//   // Initialize Serial Monitor
//   Serial.begin(115200);
  
//   // Initialize DHT Sensor
//   dht.begin();
  
//   // Initialize LCD
//   lcd.begin(16, 2);
//   lcd.init();
//   lcd.backlight();
//   lcd.setCursor(0, 0);
//   lcd.print("Smart Irrigation Sys");
  
//   // Initialize Servo
//   waterPump.attach(SERVO_PIN);
//   waterPump.write(0); // Initial position
  
//   // Initialize pins
//   pinMode(SOIL_MOISTURE_PIN, INPUT);
//   pinMode(RELAY_PIN, OUTPUT);
//   pinMode(LED_PIN, OUTPUT);
  
//   // Deactivate relay initially
//   digitalWrite(RELAY_PIN, HIGH);
// }

// void startWatering() {
//   waterPump.write(90); // Assume 90 degrees is the pumping position
//   lcd.setCursor(0, 1);
//   lcd.print("Watering ON...");
// }

// void stopWatering() {
//   waterPump.write(0); // Assume 0 degrees is the off position
//   lcd.setCursor(0, 1);
//   lcd.print("Watering OFF");
// }

// void loop() {
//   // Read sensor values
//   int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);
//   float temperature = dht.readTemperature();
//   float humidity = dht.readHumidity();
  
//   // Display sensor readings on LCD
//   lcd.setCursor(0, 1);
//   lcd.print("Temp: ");
//   lcd.print(temperature);
//   lcd.print("C Hum: ");
//   lcd.print(humidity);
//   lcd.print("%");
  
//   // Automatic watering based on soil moisture
//   if (soilMoistureValue < moistureThreshold) {
//     digitalWrite(RELAY_PIN, LOW); // Activate relay for automatic watering
//     startWatering();
//   } else {
//     digitalWrite(RELAY_PIN, HIGH); // Deactivate relay
//     stopWatering();
//   }

//   // LED indicator for watering status
//   if (soilMoistureValue < moistureThreshold) {
//     digitalWrite(LED_PIN, HIGH);
//   } else {
//     digitalWrite(LED_PIN, LOW);
//   }
  
//   // Add a small delay to avoid overwhelming the ESP32
//   delay(2000);
// }