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

#define DHTPIN 4        
#define DHTTYPE DHT22

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


unsigned long channelID = 3055273;         
const char* writeAPIKey  = "WJQN8AX7W3QDQIV1"; 

WiFiClient client;
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  delay(500);
  dht.begin();

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected!");
  Serial.print("IP: ");
  Serial.println(WiFi.localIP());

  ThingSpeak.begin(client);
}

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

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT!");
  } else {
    Serial.printf("Temp: %.2f °C | Hum: %.2f %%\n", t, h);

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

    int code = ThingSpeak.writeFields(channelID, writeAPIKey);
    if (code == 200) {
      Serial.println("ThingSpeak update OK!");
    } else {
      Serial.printf("ThingSpeak error, HTTP code: %d\n", code);
    }
  }

  delay(60000); 
}