DHT22 Transmission rev_01

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    - Project: DHT22 Transmission
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-09-28 17:20:25

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* The application must read data from the DHT22 */
    /* sensor at regular intervals, processing */
    /* temperature and humidity values while maintaining */
    /* efficient resource usage with the DHTesp library. */
    /* and send them to thingspeek */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <DHTesp.h> //https://github.com/beegee-tokyo/DHTesp
#include <WiFi.h>     // Include the WiFi library for network connectivity
#include <ThingSpeak.h> // Include the ThingSpeak library for sending data

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t dht_DHT22_DOUT_PIN_D2 = 2; // Define the pin for DHT22 data output

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Instantiate the DHTesp object
DHTesp dht; // Create an instance of the DHTesp class

// WiFi and ThingSpeak configuration
const char* ssid = "your_SSID"; // Replace with your WiFi SSID
const char* password = "your_PASSWORD"; // Replace with your WiFi password
unsigned long myChannelNumber = your_CHANNEL_NUMBER; // Replace with your ThingSpeak channel number
const char* myWriteAPIKey = "your_WRITE_API_KEY"; // Replace with your ThingSpeak Write API Key

void setup(void)
{
    // Initialize serial communication for debugging
    Serial.begin(115200);
    Serial.println("DHT Sensor Initialization");

    // Setup the DHT sensor
    dht.setup(dht_DHT22_DOUT_PIN_D2, DHTesp::DHT22); // Connect DHT sensor to GPIO 2

    // Connect to WiFi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    Serial.println("Connected to WiFi");
    ThingSpeak.begin(WiFi); // Initialize ThingSpeak
}

void loop(void)
{
    // Wait for the minimum sampling period
    delay(dht.getMinimumSamplingPeriod());

    // Read humidity and temperature
    float humidity = dht.getHumidity();
    float temperature = dht.getTemperature();

    // Check for errors in reading
    if (dht.getStatus() != DHTesp::ERROR_NONE) {
        Serial.print("Error reading DHT sensor: ");
        Serial.println(dht.getStatusString());
        return; // Exit the loop if there was an error
    }

    // Print the readings to the serial monitor
    Serial.print("Humidity: ");
    Serial.print(humidity, 1);
    Serial.print("%\t");
    Serial.print("Temperature: ");
    Serial.print(temperature, 1);
    Serial.print("°C\t");
    Serial.print("Temperature (F): ");
    Serial.print(dht.toFahrenheit(temperature), 1);
    Serial.print("°F\t");
    Serial.print("Heat Index: ");
    Serial.println(dht.computeHeatIndex(temperature, humidity, false), 1);

    // Send data to ThingSpeak
    ThingSpeak.setField(1, humidity); // Set field 1 to humidity
    ThingSpeak.setField(2, temperature); // Set field 2 to temperature
    ThingSpeak.setField(3, dht.toFahrenheit(temperature)); // Set field 3 to temperature in Fahrenheit
    int responseCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey); // Write data to ThingSpeak

    if (responseCode == 200) {
        Serial.println("Data sent to ThingSpeak successfully.");
    } else {
        Serial.print("Failed to send data to ThingSpeak. Error code: ");
        Serial.println(responseCode);
    }

    // Wait for 2 seconds before the next loop iteration
    delay(2000);
}

/* END CODE */