#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>

#define DHTPIN 15          // Correct definition for the DHT data pin
#define DHTTYPE DHT22      // DHT22 type
DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST"; // Your WiFi SSID
const char* password = ""; // Your WiFi password

String baseURL = "https://api.thingspeak.com/update?api_key=87JIILFZ88HY6E9D&field1=";
String field2 = "&field2=";

void connectToWiFi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected to WiFi");
}

void makeGETRequest(float temp, float hum) {
  String url = baseURL + String(temp) + field2 + String(hum);
  Serial.print("Sending GET request to: ");
  Serial.println(url);
  HTTPClient http;
  http.begin(url); // Specify the URL here
  int httpCode = http.GET();
  if (httpCode > 0) {
    Serial.printf("[HTTP] GET... code: %d\n", httpCode);
    if (httpCode == HTTP_CODE_OK) {
      String payload = http.getString();
      Serial.println(payload);
    }
  } else {
    Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
  }
  http.end();
}

void setup() {
  Serial.begin(115200);
  Serial.println("Upload the DHT22 Data on the ThingSpeak Server !!!");
  dht.begin();
  connectToWiFi();
}

void loop() {
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (isnan(temp) || isnan(hum)) {
    Serial.println("Failed to read from DHT sensor!");
  } else {
    Serial.printf("Weather Temperature: %.2f°C, Humidity: %.2f%%\n", temp, hum);
    makeGETRequest(temp, hum);
    delay(20000); // ThingSpeak has a minimum 15 seconds wait time, here we use 20 seconds
  }
}