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

#define LDR 36
const float GAMMA = 0.7;
const float RL10 = 50;

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

#define TOKEN "qHwAePLkXwM0wx1FgrO7" // Access token of device Display
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("\nIP address: ");
  Serial.println(WiFi.localIP());

  client.setServer(mqtt_server, 1883);
}

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

  getData();
  delay(5000);
}

void getData() {
  int analogValue = analogRead(LDR);
  float voltage = analogValue / 1024.0 * 5.0;
  float resistance = 2000.0 * voltage / (1.0 - voltage / 5.0);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  Serial.println(lux);

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

  char attributes[100];
  payload.toCharArray(attributes, 100);
  client.publish("v1/devices/me/telemetry", attributes);
  Serial.println(attributes);
}

void reconnect() {
  while (!client.connected()) {
    status = WiFi.status();
    if (status != WL_CONNECTED)