//Nama : Irfan Mahrubi
//NIM : 2409511003
//UTS Instrumentasi Dan Sistem Pengukuran

//----------------------------------------Including the libraries.
#include "WiFi.h"
#include <HTTPClient.h>
#include "DHT.h"
//----------------------------------------

#define On_Board_LED_PIN  2

// Defines the DHT22 PIN and DHT sensor type.
#define DHTPIN  4
// #define DHTTYPE DHT22
#define DHTTYPE DHT22     //22 sensor type

//----------------------------------------SSID and PASSWORD of your WiFi network.
const char* ssid = "Wokwi-GUEST";  //--> Your wifi name
const char* password = ""; //--> Your wifi password
//----------------------------------------

// Google script Web_App_URL.
String Web_App_URL = "https://script.google.com/macros/s/AKfycbw2hG8Tnq045H3jOMSfPhAHTDyOMPSR5H8nWYnTPx7lN7E_zTJnp4niCHRl1TX5oXo/exec";

String Status_Read_Sensor = "";
float Temp;
int Humd;

unsigned long previousMillis = 0;

const long interval = 1000;

DHT dht22(DHTPIN, DHTTYPE);

void Getting_DHT22_Sensor_Data() {
  Humd = dht22.readHumidity();
  Temp = dht22.readTemperature();

  if (isnan(Humd) || isnan(Temp)) {
    Serial.println();
    Serial.println(F("Failed to read from DHT sensor!"));
    Serial.println();

    Status_Read_Sensor = "Failed";
    Temp = 0.00;
    Humd = 0;
  } else {
    Status_Read_Sensor = "Success";
  }

  Serial.println();
  Serial.println("-------------");
  Serial.print(F("Status_Read_Sensor : "));
  Serial.print(Status_Read_Sensor);
  Serial.print(F(" | Humidity : "));
  Serial.print(Humd);
  Serial.print(F("% | Temperature : "));
  Serial.print(Temp);
  Serial.println(F("°C"));
  Serial.println("-------------");
}


void setup() {
  Serial.begin(115200);
  Serial.println();
  delay(1000);

  pinMode(On_Board_LED_PIN, OUTPUT);

  Serial.println();
  Serial.println("-------------");
  Serial.println("WIFI mode : STA");
  WiFi.mode(WIFI_STA);
  Serial.println("-------------");

  Serial.println();
  Serial.println("------------");
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);

  int connecting_process_timed_out = 20;
  connecting_process_timed_out = connecting_process_timed_out * 2;
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    digitalWrite(On_Board_LED_PIN, HIGH);
    delay(250);
    digitalWrite(On_Board_LED_PIN, LOW);
    delay(250);
    if (connecting_process_timed_out > 0) connecting_process_timed_out--;
    if (connecting_process_timed_out == 0) {
      delay(1000);
      ESP.restart();
    }
  }

  digitalWrite(On_Board_LED_PIN, LOW);
  
  Serial.println();
  Serial.println("WiFi connected");
  Serial.println("------------");

  delay(100);

  Serial.println();
  Serial.println("DHT12 Begin");
  Serial.println();
  delay(1000);
  
  dht22.begin();

  delay(2000);
}

void loop() {
  Getting_DHT22_Sensor_Data();

  if (millis() - previousMillis >= interval) {
    // save the last time you blinked the LED
    previousMillis = millis();

    if (WiFi.status() == WL_CONNECTED) {
      digitalWrite(On_Board_LED_PIN, HIGH);

      // Create a URL for sending or writing data to Google Sheets.
      String Send_Data_URL = Web_App_URL + "?sts=write";
      Send_Data_URL += "&srs=" + Status_Read_Sensor;
      Send_Data_URL += "&temp=" + String(Temp);
      Send_Data_URL += "&humd=" + String(Humd);

      Serial.println();
      Serial.println("-------------");
      Serial.println("Send data to Google Spreadsheet...");
      Serial.print("URL : ");
      Serial.println(Send_Data_URL);

      HTTPClient http;
    
      // HTTP GET Request.
      http.begin(Send_Data_URL.c_str());
      http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
    
      // Gets the HTTP status code.
      int httpCode = http.GET(); 
      Serial.print("HTTP Status Code : ");
      Serial.println(httpCode);
    
      // Getting response from google sheets.
      String payload;
      if (httpCode > 0) {
        payload = http.getString();
        Serial.println("Payload : " + payload);    
      }
        
      http.end();
      
      digitalWrite(On_Board_LED_PIN, LOW);
      Serial.println("-------------");
    }
  }
}
//________________________________________________________________________________