#include <Wire.h>
#include <Adafruit_BMP085.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include "DHT.h"
#define DHTPIN 19
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
/************************* WiFi Access Point *********************************/
#define WLAN_SSID       "Wokwi-GUEST"
#define WLAN_PASS       ""
/****************************************************************************/

Adafruit_BMP085 bmp;
const char* thingsSpeakUrl ="https://api.thingspeak.com/update.json?api_key=";
const char* apiKey = "<api key>";

void setup()
{
  Serial.begin(9600);
  Serial.print("Connecting to ");
  Serial.println(WLAN_SSID);

  WiFi.begin(WLAN_SSID, WLAN_PASS, 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  if (!bmp.begin())
  {
    Serial.println("Could not find a valid BMP085/BMP180 sensor, check wiring!");
    while (1) {}
  }
  dht.begin();
}

void loop()
{
  if (WiFi.status() == WL_CONNECTED)
  {
    WiFiClient client;
    float temperature, pressure;

    Serial.print("Temperature = ");
    temperature = bmp.readTemperature();
    Serial.print(temperature);
    pressure = bmp.readPressure();
    Serial.println(" *C");

    Serial.print("Pressure = ");
    Serial.print(pressure);
    Serial.println(" Pa");

    String url = String(thingsSpeakUrl) + String(apiKey) + "&field4=" + String(temperature) + "&field5=" + String(pressure);
    sendThingsSpeakRequest(url);   
  }
  else 
  {
    Serial.println("WiFi Disconnected");
  }

  delay(5000);
}

void sendThingsSpeakRequest(String url) {
  HTTPClient http;


  if (http.begin(url)) {
    // http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    int httpResponseCode = http.GET();

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.print("Thingspeak response: ");
      Serial.println(response);
    } else {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
    }

    http.end();
  } else {
    Serial.println("Failed to connect to Thingspeak");
  }
}