#include "DHT.h"
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include "ThingSpeak.h"

LiquidCrystal_I2C LCD(0x27, 16, 2);

// Define DHT sensor pin and type
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// ThingSpeak settings
const unsigned long myChannelNumber = 2537020;
const char* myApiKey = "FVBXKY9XGO8SK3IQ";
const char* server = "api.thingspeak.com";

// Initialize WiFi client
WiFiClient client;

void setup() {
  // Start serial communication
  Serial.begin(115200);

  // Initialize DHT sensor
  dht.begin();

  // Initialize LCD
  LCD.init();
  LCD.backlight();

  // Set pin mode for LED
  pinMode(2, OUTPUT);

  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("WiFi not connected");
  }
  Serial.println("WiFi connected!");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  
  // Initialize ThingSpeak
  ThingSpeak.begin(client);
}

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

  // Display values on LCD
  LCD.setCursor(0, 0);
  LCD.print("Temp: ");
  LCD.print(temperature);
  LCD.print(" C");

  LCD.setCursor(0, 1);
  LCD.print("Hum: ");
  LCD.print(humidity);
  LCD.print(" %");

  // Print values to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" C, ");
  Serial.print("Humidity: ");
  Serial.println(humidity);

  // Control LED based on temperature and humidity
  if (temperature > 30.0 && humidity <= 85.0) {
    digitalWrite(2, HIGH);
  } else {
    digitalWrite(2, LOW);
  }

  // Send data to ThingSpeak
  if (WiFi.status() == WL_CONNECTED) {
    ThingSpeak.setField(1, temperature);
    ThingSpeak.setField(2, humidity);
    int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
    if (x == 200) {
      Serial.println("Data sent to ThingSpeak successfully");
    } else {
      Serial.println("Failed to send data to ThingSpeak");
    }
  }

  // Wait 20 seconds before next update
  delay(2000);
}