#define BLYNK_TEMPLATE_NAME "Plant Monitoring System"
#define BLYNK_AUTH_TOKEN "LMuyt9_ENbhDr2dj2Wv_-yeKzjr3tjqr"
#define BLYNK_TEMPLATE_ID "TMPL52XuKW4mW"

#include <DHT.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#define DHT_PIN 2
#define DHT_TYPE DHT22
#define LDR_PIN 32
#define POT_PIN 33

DHT dht(DHT_PIN, DHT_TYPE);
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASS ""

unsigned long previousMillis = 0;
const long interval = 1000; // Interval for sensor reading

void setup() {
  Serial.begin(115200);
  connectToWiFi();
  Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASS);
  dht.begin();
}

void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    connectToWiFi();
  }
  Blynk.run();
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    readSensors();
  }
}

void connectToWiFi() {
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" Connected!");
}

int readAnalogStable(int pin) {
  int total = 0;
  for (int i = 0; i < 10; i++) {
    total += analogRead(pin);
    delay(10); // Small delay between readings
  }
  return total / 10;
}

void readSensors() {
  // Read temperature and humidity from DHT sensor
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

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

  // Read light intensity from LDR
  int lightIntensity = readAnalogStable(LDR_PIN);

  // Read soil moisture simulation from potentiometer
  int soilMoisture = readAnalogStable(POT_PIN);
  int soilMoisturePercentage = map(soilMoisture, 0, 1023, 0, 100);  

  // Print sensor values to the console
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");
  
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  Serial.print("Light Intensity: ");
  Serial.print(lightIntensity);
  Serial.println(" %");

  Serial.print("Soil Moisture: ");
  Serial.print(soilMoisturePercentage);
  Serial.println(" %");

  // Send data to Blynk
  Blynk.virtualWrite(V0, temperature);  
  Blynk.virtualWrite(V1, humidity);     
  Blynk.virtualWrite(V5, lightIntensity);  
  Blynk.virtualWrite(V6, soilMoisturePercentage);   
}