#define BLYNK_TEMPLATE_ID "TMPL3Ob01oI7P"
#define BLYNK_TEMPLATE_NAME "smart soil nutrition monitoring system"
#define BLYNK_AUTH_TOKEN "21HEIOM4ZG9TyWnl260arpn6oEmSflK-"

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>  

DHT dht(4, DHT22);
float temperature;
float humidity;

LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD address and dimensions

char ssid[] = "Wokwi-GUEST";    // Replace with your WiFi SSID
char pass[] = ""; // Replace with your WiFi Password

#define LED_PIN 2 // Replace with the pin connected to your LED

void setup() {
  Wire.begin(23, 22);
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();

  // Connect to WiFi
  Serial.println("Connecting to WiFi");
  WiFi.begin(ssid, pass);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected to WiFi");

  // Connect to Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
}

void loop() {
  // Soil Moisture Monitoring
  int soilMoisture = analogRead(34);
  String msg = soilMoisture > 2165 ? "WET" : soilMoisture < 3135 ? "DRY" : "DRY";
  lcd.clear();
  lcd.print("Soil: ");
  lcd.print(msg);
  Blynk.virtualWrite(V0, soilMoisture); // Send soil moisture data to Blynk

  // Temperature and Humidity Monitoring
  temperature = dht.readTemperature();
  humidity = dht.readHumidity();
  Blynk.virtualWrite(V1, temperature); // Send temperature data to Blynk
  Blynk.virtualWrite(V2, humidity); // Send humidity data to Blynk

  delay(500); 
  Blynk.run();

  delay(500); 
}