/*************************************************************************************************
 *  Created By: Tauseef Ahmad
 *  Created On: 3 April, 2023
 *  
 *  YouTube Video: https://youtu.be/VEN5kgjEuh8
 *  My Channel: https://www.youtube.com/channel/UCOXYfOHgu-C-UfGyDcu5sYw/
 *  
 *  *********************************************************************************************
 *  Preferences--> Aditional boards Manager URLs : 
 *  For ESP32 (2.0.3):
 *  https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
 ***********************************************************************************************/

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

#include <DHT.h> 
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht22(DHTPIN, DHTTYPE); 

String URL = "localhost/latihan_database_esp32/sensor_db.php";

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

int temperature = 0;
int humidity = 0;

void setup() {
  Serial.begin(115200);

  dht22.begin(); 
  
  connectWiFi();
}

void loop() {
  if(WiFi.status() != WL_CONNECTED) {
    connectWiFi();
  }

  Load_DHT22_Data();
  String postData = "temperature=" + String(temperature) + "&humidity=" + String(humidity);
  
  HTTPClient http;
  http.begin(URL);
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  
  int httpCode = http.POST(postData);
  String payload = http.getString();

  Serial.print("URL : "); Serial.println(URL); 
  Serial.print("Data: "); Serial.println(postData);
  Serial.print("httpCode: "); Serial.println(httpCode);
  Serial.print("payload : "); Serial.println(payload);
  Serial.println("--------------------------------------------------");
  delay(5000);
}


void Load_DHT22_Data() {
  //-----------------------------------------------------------
  temperature = dht22.readTemperature(); //Celsius
  humidity = dht22.readHumidity();
  //-----------------------------------------------------------
  // Check if any reads failed.
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    temperature = 0;
    humidity = 0;
  }
  //-----------------------------------------------------------
  Serial.printf("Temperature: %d °C\n", temperature);
  Serial.printf("Humidity: %d %%\n", humidity);
}

void connectWiFi() {
  WiFi.mode(WIFI_OFF);
  delay(1000);
  //This line hides the viewing of ESP as wifi hotspot
  WiFi.mode(WIFI_STA);
  
  WiFi.begin(ssid, password);
  Serial.println("Connecting to WiFi");
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
    
  Serial.print("connected to : "); Serial.println(ssid);
  Serial.print("IP address: "); Serial.println(WiFi.localIP());
}