[arduino code examples for A32 Pro]-12 How to use DHT11 temperature humidity sensor

Code:
/*

 *  Made by KinCony IoT: https://www.kincony.com

 *  

 *  This program reads temperature and humidity values from a DHT11 sensor 

 *  connected to GPIO2 of an ESP32 board, and prints the readings to the serial monitor.

 *  

 *  The DHT11 sensor measures the relative humidity and temperature in the environment.

 *  This data is then read by the ESP32 and displayed in the serial monitor.

 *

 *  Requirements:

 *  - ESP32 microcontroller

 *  - DHT11 temperature and humidity sensor

 *  - DHT sensor library by Adafruit (Install in Arduino IDE)

 *

 *  Connections:

 *  - DHT11 Data Pin -> GPIO2 on ESP32

 *  - DHT11 VCC Pin -> 3.3V on ESP32

 *  - DHT11 GND Pin -> GND on ESP32

 */



#include <DHT.h>  // Import the DHT library



// Define the GPIO pin where the DHT11 sensor is connected

#define DHTPIN 2       // DHT11 data pin is connected to GPIO2 on ESP32



// Define the type of DHT sensor being used (DHT11)

#define DHTTYPE DHT11  // DHT11 sensor type



// Create a DHT object to read temperature and humidity

DHT dht(DHTPIN, DHTTYPE);



void setup() {

  // Initialize serial communication for debugging at a baud rate of 115200

  Serial.begin(115200);

  Serial.println("DHT11 Sensor Test - Made by KinCony IoT: https://www.kincony.com");



  // Initialize the DHT sensor

  dht.begin();

}



void loop() {

  // Wait for 2 seconds between each reading to ensure stable data

  delay(2000);



  // Read humidity value from the DHT11 sensor

  float humidity = dht.readHumidity();

  

  // Read temperature value from the DHT11 sensor in Celsius

  float temperature = dht.readTemperature();



  // Check if there was an error reading the data

  if (isnan(humidity) || isnan(temperature)) {

    // Print error message if the sensor reading failed

    Serial.println("Failed to read from DHT11 sensor!");

    return;  // Exit loop iteration and try again after delay

  }



  // Print the humidity value to the serial monitor

  Serial.print("Humidity: ");

  Serial.print(humidity);

  Serial.print("%");



  // Print the temperature value to the serial monitor

  Serial.print("  Temperature: ");

  Serial.print(temperature);

  Serial.println("°C");

}