#include <DHT.h>
#include <WiFi.h>
#include "ThingSpeak.h"

#define DHTPIN 15
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;

unsigned long myChannelNumber = 2642902;
const char * myWriteAPIKey = "WDVXG5VUG8EAFD39";

void setup() {
  Serial.begin(115200);
  dht.begin();
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to WiFi");
  ThingSpeak.begin(client);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  if (!isnan(temperature) && !isnan(humidity)) {
    ThingSpeak.setField(1, temperature);
    ThingSpeak.setField(2, humidity);
    
    int responseCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
    if (responseCode == 200) {
      Serial.println("Channel update successful.");
    } else {
      Serial.println("Problem updating channel. HTTP error code " + String(responseCode));
    }
  } else {
    Serial.println("Failed to read from DHT sensor!");
  }
  
  delay(2000); // Update every 20 seconds
}