ReadPlot.ino

/**
 * DHT11 Sensor Serial Plotter Reader
 * This sketch reads temperature and humidity data from the DHT11 sensor and prints the values to the Arduino IDE serial plotter.
 *
 * Author: Dhruba Saha
 * Version: 2.1.0
 * License: MIT
 */

// Include the DHT11 library for interfacing with the sensor.
#include <DHT11.h>

// Create an instance of the DHT11 class.
// - For Arduino: Connect the sensor to Digital I/O Pin 2.
// - For ESP32: Connect the sensor to pin GPIO2 or P2.
// - For ESP8266: Connect the sensor to GPIO2 or D4.
DHT11 dht11(2);

void setup() {
    // Initialize serial communication to allow debugging and data readout.
    // Using a baud rate of 9600 bps.
    Serial.begin(9600);

    // Uncomment the line below to set a custom delay between sensor readings (in milliseconds).
    // dht11.setDelay(500); // Set this to the desired delay. Default is 500ms.
}

void loop() {
    int temperature, humidity;

    // Attempt to read the temperature and humidity values from the DHT11 sensor.
    int result = dht11.readTemperatureHumidity(temperature, humidity);

    // Check the results of the readings.
    // If the reading is successful, print the temperature and humidity values in CSV format.
    if (result == 0) {
        Serial.print("Temperature:");
        Serial.print(temperature);
        Serial.print(",Humidity:");
        Serial.println(humidity);
    } else {
        // Print error message based on the error code.
        Serial.println(DHT11::getErrorString(result));
    }
}