DHT11 Telemetry rev_01

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    - Project: DHT11 Telemetry
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-08-02 09:13:59

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Connect arduino to iot hub and send the telemetry */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <DHT.h>    //https://github.com/adafruit/DHT-sensor-library

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void sendTelemetry(float humidity, float temperature); // Function prototype for sending telemetry

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Temp_DHT11_DOUT_PIN_D2        = 2; // Pin for DHT11 sensor
const uint8_t Temp_DHT11_DOUT_PIN_D3        = 3; // Another pin (not used in this example)

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Initialize the DHT sensor object with the pin and type
#define DHTTYPE DHT11 // Define the type of DHT sensor
DHT dht(Temp_DHT11_DOUT_PIN_D2, DHTTYPE); // Create an instance of the DHT class

void setup(void)
{
    // Initialize serial communication for debugging
    Serial.begin(9600);
    Serial.println(F("DHTxx test!"));

    // Initialize the DHT sensor
    dht.begin(); // Start the DHT sensor

    // Set pin modes for digital pins
    pinMode(Temp_DHT11_DOUT_PIN_D2, INPUT_PULLUP);
    pinMode(Temp_DHT11_DOUT_PIN_D3, INPUT_PULLUP);
}

void loop(void)
{
    // Delay between readings
    delay(2000);

    // Read humidity and temperature from the DHT sensor
    float h = dht.readHumidity(); // Read humidity
    float t = dht.readTemperature(); // Read temperature in Celsius
    float f = dht.readTemperature(true); // Read temperature in Fahrenheit

    // Check if any reads failed and exit early (to try again).
    if (isnan(h) || isnan(t) || isnan(f)) {
        Serial.println(F("Failed to read from DHT sensor!"));
        return; // Exit the loop if reading failed
    }

    // Compute heat index
    float hif = dht.computeHeatIndex(f, h); // Heat index in Fahrenheit
    float hic = dht.computeHeatIndex(t, h, false); // Heat index in Celsius

    // Print the results to the Serial Monitor
    Serial.print(F("Humidity: "));
    Serial.print(h);
    Serial.print(F("%  Temperature: "));
    Serial.print(t);
    Serial.print(F("°C "));
    Serial.print(f);
    Serial.print(F("°F  Heat index: "));
    Serial.print(hic);
    Serial.print(F("°C "));
    Serial.print(hif);
    Serial.println(F("°F"));

    // Send telemetry data to IoT hub
    sendTelemetry(h, t); // Call the function to send telemetry data
}

// Function to send telemetry data to IoT hub
void sendTelemetry(float humidity, float temperature) {
    // Placeholder for sending data to IoT hub
    // Replace this with actual code to connect to your IoT platform and send the data
    Serial.print(F("Sending telemetry... Humidity: "));
    Serial.print(humidity);
    Serial.print(F("%, Temperature: "));
    Serial.print(temperature);
    Serial.println(F("°C"));
}

/* END CODE */