2.1pCODE

#include <WiFiNINA.h>
#include "DHT.h"
#include "secrets.h"
#include "ThingSpeak.h"  

#define DHTPIN 2      
#define DHTTYPE DHT11 

DHT dht(DHTPIN, DHTTYPE);
WiFiClient client;

// WiFi credentials
char ssid[] = SECRET_SSID;
char pass[] = SECRET_PASS;
int keyIndex = 0;  // 

// ThingSpeak channel details
unsigned long DHT11ChannelNumber = SECRET_CH_ID;
int statusCode = 0;
int field[8] = {1, 2, 3, 4, 5, 6, 7, 8};

void setup() {
    Serial.begin(115200);
    while (!Serial);
    
    Serial.println(F("DHT11 test!"));
    dht.begin();
    ThingSpeak.begin(client);
    
    // Connect to WiFi
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(SECRET_SSID);
    while (WiFi.status() != WL_CONNECTED) {
        WiFi.begin(ssid, pass);
        Serial.print(".");
        delay(5000);
    }
    Serial.println("\nConnected");
}

void loop() {
    
    delay(2000);
    // Read temperature and humidity
    float humidity = dht.readHumidity();
    float temperatureC = dht.readTemperature();
    float temperatureF = dht.readTemperature(true);
    
    if (isnan(humidity) || isnan(temperatureC) || isnan(temperatureF)) {
        Serial.println(F("Failed to read from DHT sensor!"));
        return;
    }


    Serial.print(F("Humidity: "));
    Serial.print(humidity);
    Serial.print(F("%  Temperature: "));
    Serial.print(temperatureC);
    Serial.print(F("°C "));
    Serial.print(temperatureF);
    
 
    // Send data to ThingSpeak
    ThingSpeak.setField(field[0], temperatureF);
    ThingSpeak.setField(field[1], humidity);
    
    statusCode = ThingSpeak.writeFields(DHT11ChannelNumber, SECRET_API_KEY);
    if (statusCode == 200) {
        Serial.println("Data sent to ThingSpeak successfully.");
    } else {
        Serial.println("Problem reading channel. HTTP error code " + String(statusCode));
    }
    
    delay(60000); // 60s gap
}