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

#define DHTPIN 15 
#define DHTTYPE DHT22  // change to DHT11 if needed

DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST";
const char* password = "";

unsigned long channelID = 3206125; 
const char* writeAPI = "B3RZRZ61J6GLNIUJ";

WiFiClient client;

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);

  Serial.print("Connecting to Wokwi WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi Connected!");

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

void loop() {

  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    Serial.println("DHT reading failed!");
    return;
  }

  Serial.print("Temp: "); Serial.print(t);
  Serial.print("   Humidity: "); Serial.println(h);

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

  int x = ThingSpeak.writeFields(channelID, writeAPI);

  if (x == 200) {
    Serial.println("Updated to ThingSpeak Successfully!");
  } else {
    Serial.print("Update Failed. Error Code: ");
    Serial.println(x);
  }

  delay(20000);  // ThingSpeak requires minimum 15 seconds delay
}