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

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

const int ldr = 14;

#define TOKEN "zn9klgy3v8694whbzohg" //Access token of device Display
// IPAddress mqtt_server = "192.168.56.1";
const char* mqtt_server = "mqtt.thingsboard.cloud";
// IPAddress mqtt_server(192,168,1,7);
// Demo - mqtt://192.168.1.7:1883

WiFiClient wifiClient;
PubSubClient client(wifiClient);
int status = WL_IDLE_STATUS;
long temp;
long hum;
void setup()
{
  Serial.begin(9600);
  delay(10);
  Serial.print(" Connect to : ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
//  WiFi.config(IP, NETWORK, NETMASK, DNS);
  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);
// client.setCallback(callback);
}

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

void getData()
{
  temp = random(27, 30);
  hum = random(50, 70);
  Serial.print(temp);
  Serial.print(",");
  Serial.println(hum);
  Serial.println(ldr);

  String payload = "{";
  payload += "\"Humidity\":";payload += temp; payload += ",";
  payload += "\"Temperature\":";payload += hum; 
  payload += "}";

  char attributes[1000];
  payload.toCharArray( attributes, 1000 );
  client.publish( "v1/devices/me/telemetry",attributes);
  Serial.println( attributes );   
}

void reconnect() {
  // Loop until we're reconnected
  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 ...");
    // Attempt to connect (clientId, username, password)
    if ( client.connect("3a90f960-1ad1-11ed-b480-cbe4cea4aa70", TOKEN, "") ) {
      Serial.println( "[DONE]" );
    } else {
      Serial.print( "[FAILED] [ rc = " );
      Serial.println( " : retrying in 5 seconds]" );
      delay( 500 );
    }
  }
}