#define BLYNK_TEMPLATE_ID "TMPL3vlvFiAmp"
#define BLYNK_TEMPLATE_NAME "Smart Plant Care System"
#define BLYNK_AUTH_TOKEN "BUlPIMwijG33WLlugb6GXTKdpoO5u6o_"

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

#define DHTPIN 16        
#define DHTTYPE DHT22
#define POT_PIN 32
#define LDR_PIN 14
#define RELAY_PIN 19
#define LED_PIN 18

DHT dht(DHTPIN, DHTTYPE);

char ssid[] = "Wokwi-GUEST";        // Wi-Fi SSID
char pass[] = "";                   // Wi-Fi password

int soilMoistureThreshold = 100;    // Soil moisture threshold (adjust as needed)

void setup() {
  Serial.begin(115200);
  
  // Initialize sensors and relay
  dht.begin();
  pinMode(POT_PIN, INPUT);
  pinMode(LDR_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

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

  Serial.println("Setup complete. Waiting for sensor data...");
}

void loop() {
  Blynk.run();

  // Read sensor values
  int soilMoisture = analogRead(POT_PIN);
  int lightLevel = analogRead(LDR_PIN);
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Print values to Serial Monitor for debugging
  Serial.print("Soil Moisture: ");
  Serial.println(soilMoisture);
  Serial.print("Light Level: ");
  Serial.println(lightLevel);
  Serial.print("Temperature: ");
  Serial.println(temperature);
  Serial.print("Humidity: ");
  Serial.println(humidity);

  // Check if DHT sensor read failed
  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
  }

  // Send values to Blynk app
  Blynk.virtualWrite(V1, soilMoisture);     // Soil moisture
  Blynk.virtualWrite(V0, lightLevel);       // Light level
  Blynk.virtualWrite(V3, temperature);      // Temperature
  Blynk.virtualWrite(V4, humidity);         // Humidity
  Blynk.virtualWrite(V5, digitalRead(LED_PIN)); // LED status (HIGH or LOW)

  // Pump control logic based on soil moisture level
  if (soilMoisture < soilMoistureThreshold) {
    digitalWrite(RELAY_PIN, HIGH); // Activate relay (pump on)
    digitalWrite(LED_PIN, HIGH);   // Optional LED to indicate pump status
    Serial.println("Pump ON");
  } else {
    digitalWrite(RELAY_PIN, LOW);  // Deactivate relay (pump off)
    digitalWrite(LED_PIN, LOW);    // Turn off LED
    Serial.println("Pump OFF");
  }

  delay(1000); // Wait before the next reading
}