#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

String wifiSSID = "Wokwi-GUEST";
String wifiPassword = "";


String tbHost = "demo.thingsboard.io";
String tbToken = "aEocvGaS9v4iEqi8J6oH";

const int PIR = 12;

void connectWifi() {
  WiFi.begin(wifiSSID.c_str(), wifiPassword.c_str());
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
}

void sendDataToThingsBoard(String temperature, String humidity) {
  HTTPClient http;
  String url = "http://" + tbHost + "/api/v1/" + tbToken + "/telemetry";
  String payload = "{\"temperature\":" + temperature + ",\"humidity\":" + humidity + "}";

  http.begin(url);
  http.addHeader("Content-Type", "application/json");

  int httpResponseCode = http.POST(payload);

  if (httpResponseCode > 0) {
    Serial.println("Data sent to ThingsBoard successfully");
  } else {
    Serial.println("Error sending data to ThingsBoard");
  }

  http.end();
}

void setup() {
  Serial.begin(115200);
  connectWifi();
  lcd.init();
  lcd.backlight();
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();

  String temp = String(data.temperature,2);
  String hum = String(data.humidity,1);

  // Serial.println("Temp: " + String(temp) + "°C");
  // Serial.println("Humidity: " + String(hum) + "%");
  // Serial.println("---");

  lcd.setCursor(0, 0);
  lcd.print("Temperature: " + temp); 
  lcd.setCursor(0, 1);
  lcd.print("Humidity: " + hum);  

  sendDataToThingsBoard(temp, hum);
  delay(1000); // Wait for a new reading from the sensor (DHT22 has ~0.5Hz sample rate)
}