#include <WiFi.h>
#include <DHTesp.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const char *ssid = "Wokwi-GUEST";
const char *password = "";
const char *thingSpeakApiKey = "O27HUY9TEU4T1ZOO";
const char *thingSpeakAddress = "api.thingspeak.com";

const int DHT_PIN = 15;

DHTesp dht;

WiFiClient client;

// void setup() {
//   Serial.begin(115200);
//   delay(1000);
  
//   Serial.println("Connecting to Wi-Fi...");
//   WiFi.begin(ssid, password);

//   while (WiFi.status() != WL_CONNECTED) {
//     delay(500);
//     Serial.print(".");
//   }
  
//   Serial.println("");
//   Serial.println("Wi-Fi connected");
  
//   dht.setup(DHT_PIN, DHTesp::DHT22);
// }

void setup() {
  Serial.begin(115200);
  delay(1000);
  
  Serial.println("Initializing LCD...");
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("LCD initialized");
  delay(1000); // Delay after LCD initialization
  
  Serial.println("Connecting to Wi-Fi...");
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("Wi-Fi connected");
  
  dht.setup(DHT_PIN, DHTesp::DHT22);
}


void loop() {
  float humidity = dht.getHumidity();
  float temperature = dht.getTemperature();
  
  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    delay(2000);
    return;
  }

  // Serial.print("Temperature: ");
  // Serial.print(temperature);
  // Serial.print(" °C\tHumidity: ");
  // Serial.print(humidity);
  // Serial.println(" %");

  // Display temperature and humidity on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print(" %");
  
  delay(2000);
  
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C\tHumidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  if (client.connect(thingSpeakAddress, 80)) {
    String data = "GET /update?api_key=";
    data += thingSpeakApiKey;
    data += "&field1=";
    data += String(temperature);
    data += "&field2=";
    data += String(humidity);
    data += "\r\n\r\n";

    client.print(data);
    Serial.println("Sent data to ThingSpeak");
  } else {
    Serial.println("Failed to connect to ThingSpeak");
  }
  
  delay(20000); // Send data every 20 seconds
}