#define BLYNK_TEMPLATE_ID "YourTemplateID"
#define BLYNK_AUTH_TOKEN "YourAuthToken"
#define BLYNK_PRINT Serial

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

char auth[] = "YourAuthToken";    // Blynk token
char ssid[] = "YourWiFiName";     // WiFi name
char pass[] = "YourWiFiPassword"; // WiFi password

#define DHTPIN 15
#define DHTTYPE DHT11
#define MOISTURE_PIN 34
#define PUMP_PIN 23
#define SWITCH_PIN 21

DHT dht(DHTPIN, DHTTYPE);

int threshold = 40;  // Moisture % threshold
bool manualControl = false;
bool pumpState = false;

BLYNK_WRITE(V4) {  // Manual control from app
  manualControl = param.asInt();
}

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  dht.begin();

  pinMode(PUMP_PIN, OUTPUT);
  pinMode(SWITCH_PIN, INPUT_PULLUP); // Button with pull-up
  digitalWrite(PUMP_PIN, HIGH); // Pump OFF initially
  Serial.println("Smart Agriculture System Started...");
}

void loop() {
  Blynk.run();
  
  // Read soil moisture (simulate with potentiometer)
  int moistureValue = analogRead(MOISTURE_PIN);
  int moisturePercent = map(moistureValue, 0, 4095, 100, 0);

  // Read DHT11 data
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Send data to Blynk
  Blynk.virtualWrite(V1, moisturePercent);
  Blynk.virtualWrite(V2, temperature);
  Blynk.virtualWrite(V3, humidity);

  Serial.print("Moisture: "); Serial.print(moisturePercent); Serial.print("%  ");
  Serial.print("Temp: "); Serial.print(temperature); Serial.print("°C  ");
  Serial.print("Humidity: "); Serial.println(humidity);

  bool switchPressed = digitalRead(SWITCH_PIN) == LOW;

  if (manualControl || switchPressed) {
    pumpState = true; // Manual ON
  } else if (moisturePercent < threshold) {
    pumpState = true; // Auto ON
  } else {
    pumpState = false; // OFF
  }

  // Control pump (LED)
  digitalWrite(PUMP_PIN, pumpState ? LOW : HIGH);
  Blynk.virtualWrite(V5, pumpState);

  Serial.print("Pump: ");
  Serial.println(pumpState ? "ON" : "OFF");
  
  delay(2000);
}