// Wifi and MQTT library
#include <SPI.h>
#include <WiFi.h>
#include <PubSubClient.h>

// Load the DHT library
#include <DHT.h>
 
// Define macros
// DHTPIN specifies the physical pin to which the sensor is connected (previously we had connected the sensor's DAT pin to ESP32 pin no. 14)
#define DHTPIN 4
// Sensor type
#define DHTTYPE DHT22
 
// Define the DHT sensor
DHT dht(DHTPIN, DHTTYPE);
 
// This section is executed once when the device starts up
void setup() {
  Serial.begin(115200);
  Serial.println("Serial port opened");
  dht.begin();
  Serial.println("DHT sensor initialized");
}
 
// Repeat endlessly after the setup() function execution
void loop() {
  // Wait before the first measurement because the sensor is quite slow
  delay(2000);
  // Define variables, float indicates a decimal number (see explanations below)
  float temperature, humidity;
 
  // Store the temperature reading in the 'temperature' variable using the readTemperature() function from the dht library.
  temperature = dht.readTemperature();

  // TODO: Store the humidity reading in the 'humidity' variable
  humidity = dht.readHumidity();

  ///////////////////////////////////////////////////////////////////////////////////////////////////////
  //
  //    Look for a function similar to readTemperature() for reading humidity in the dht library documentation
  //    from the link provided below. Add it after "humidity = " in the line above.
  //    https://adafruit.github.io/DHT-sensor-library/html/class_d_h_t.html
  //
  ///////////////////////////////////////////////////////////////////////////////////////////////////////
 
  // Check if reading values from the sensor was successful, if not, print an error message to the serial port
  if (isnan(humidity) || isnan(temperature)) {
    // Print to the serial port
    Serial.println("Failed to read from the sensor");
    // Interrupt the execution of the loop() function
    return;
  }
 
  // Printing the temperature

  // Print the text "Temperature: " to the serial port
  Serial.print("Temperature: ");
  // Print the content of the 'temperature' variable
  Serial.print(temperature);
  // Print the °C symbol
  Serial.print("°C ");
  // Print a line break (= new line)
  Serial.println();
 
// TODO: Printing the humidity

////////////////////////////////////////////////////////////////////////////////////////////////////
//
//    Write the necessary lines of code above to print humidity. Retrieve the humidity value from the
//    'humidity' variable using the Serial.println() function. You may consider the temperature
//    printing codes above as an example.
//
////////////////////////////////////////////////////////////////////////////////////////////////////


  // Print the text "Temperature: " to the serial port
  Serial.print("Humidity: ");
  // Print the content of the 'temperature' variable
  Serial.print(humidity);
  // Print the °C symbol
  Serial.print("% ");
  // Print a line break (= new line)
  Serial.println();

}