#if defined(ESP8266)
#include <ESP8266WiFi.h>
#elif defined(ESP32)
#include <WiFi.h>
#endif

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

#define LDR 12
const float GAMMA = 0.7;
const float RL10 = 50;

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

#define TOKEN "asjkfhjkhsdkfhsdk" // acces token
const char* mqtt_server = "thingsboard.cloud";

WiFiClient wifiClient;
PubSubClient client(wifiClient);
int status = WL_IDLE_STATUS;

void setup ()
{
  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.println(ssid);
  client.setServer( mqtt_server, 1883);
}

void loop ()
{
  if ( !client.connected() )
  {
    reconnect();
  }
getData();
  delay(5000);
}

void getData()
{
  int analogValue = analogRead(LDR);
  float voltage = ( analogValue / 4095.) * 3.3;
  float resistance = (2000 * voltage / 3.3);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  Serial.println(lux);

  String payload = "{";
  payload += "\"Intensitas Cahaya\":"; payload += lux ;
  payload += "}";

  char attributes [1000];
  payload.toCharArray (attributes, 1000);
  client.publish ( "v1/device/me/telemetry", attributes);
  client.publish ( "v1/device/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("283572395732847"), TOKEN, ""){
      Serial.println("[DONE]");
    } else {
      Serial.print( "[FAILED] [ rc = ");
      Serial.println(" : retrying in 5 second]");
      delay(5000);
    }
  }
}