#include <WiFi.h>
#include "ThingsBoard.h"
#include <PubSubClient.h>
#include "DHT.h"

#define LDR 34
const float GAMMA = 0.7;
const float RL10 = 50;
 
#define DHTPIN 15
#define DHTTYPE DHT22

// Initialize DHT sensor.
DHT dht(DHTPIN, DHTTYPE);

const char *ssid = "Wokwi-GUEST";
const char *password = "";
 
#define TOKEN "g5TNG4Yagk0DT3BWPlvU" //Access token
#define DEVICE_ID "dbd5e560-7e13-11ed-8b62-e9eba22b9df6" //Device ID
const char* mqtt_server = "thingsboard.cloud";
 
WiFiClient wifiClient;
PubSubClient client(wifiClient);
int status = WL_IDLE_STATUS;
void setup()
{
  Serial.begin(115200);
  dht.begin();
  delay(10);
  Serial.begin(9600);
  delay(10);
  pinMode(LDR, INPUT);
  Serial.print(" Connect to : ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print("...");
  }
  Serial.print("\n");
  Serial.print("IP address : ");
  Serial.print(WiFi.localIP());
  Serial.print("\n");
  Serial.print("Connect to : ");
  Serial.println(ssid);
  client.setServer( mqtt_server, 1883);
 
}
 
void loop()
{
  if ( !client.connected() )
  {
    reconnect();
  }
  getData();
  delay(5000);
}
 
void getData()
{
  // Reading temperature atau humidity
  float humidity = dht.readHumidity();
  //  temperature dlm Celsius
  float temperature = dht.readTemperature();
  //
  int analogValue = analogRead(LDR);
  float voltage = (analogValue / 4095.) * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
 
  Serial.println(lux);
 
  String payload = "{";
  payload += "\"Intensitas Cahaya\":";
  payload += lux;
  payload += "\"Humidity\":";
  payload += humidity ;
  payload += "\"Temprature\":";
  payload += temperature ;
  payload += "}";

 
  char attributes[1000];
  payload.toCharArray( attributes, 1000 );
  client.publish( "v1/devices/me/telemetry", attributes);
  client.publish( "v1/devices/me/attributes", attributes);
  Serial.println( attributes );
}
 
void reconnect() {
  while (!client.connected()) {
    status = WiFi.status();
    if ( status != WL_CONNECTED) {
      WiFi.begin(ssid, password);
      while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
      }
      Serial.println("Connected to AP");
    }
    Serial.print("Connecting to ThingsBoard node ...");
    if ( client.connect(DEVICE_ID, TOKEN, "") ) {
      Serial.println( "[DONE]" );
    } else {
      Serial.print( "[FAILED] [ rc = " );
      Serial.println( " : retrying in 5 seconds]" );
      delay( 5000 );
    }
  }
}