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

#define DHTPIN 4       // DHT22 data pin connected to GPIO4
#define DHTTYPE DHT22  // DHT 22 (AM2302) and use DHT11 

DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST"; // Wokwi default WiFi
const char* password = "";        // no password

WiFiClient client;

unsigned long myChannelNumber = 3035607; // replace with your ThingSpeak channel number
const char* myWriteAPIKey = "KWWAXJD8WUF1UP2K";           // replace with your ThingSpeak write API key

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

  ThingSpeak.begin(client);
  dht.begin();
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" °C, Humidity: ");
  Serial.print(h);
  Serial.println(" %");

  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, h);

  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }

  delay(20000); // ThingSpeak needs 15s delay between updates
}