fullcode

#include <ESP8266WiFi.h>
#include <EEPROM.h>
#include <PubSubClient.h>
#include <WiFiUdp.h>
#include <NTPClient.h>
#include <time.h>



const char* ssid = "";
const char* password =  "";
const char* mqttServer = "";
const int mqttPort = 1883;
const char* mqttUser = "";
const char* mqttPassword = "";

unsigned long lastSend;



WiFiClient espClient;
PubSubClient client(espClient);

char buffer[100] = {0};
char message_buff[100];
String msgString = "";




unsigned long time_second;


void setup() {

  Serial.begin(115200);


  client.setServer(mqttServer, mqttPort);
  client.setCallback(callback);

  setup_wifi();



}



void setup_wifi() {

  delay(10);
  Serial.printf("Connecting to %s ", ssid);
  WiFi.begin(ssid, password);


  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(5000);
  }

  if(client.connect("ESP8266Client", mqttUser, mqttPassword )){
    Serial.println("connected");
    Serial.println(WiFi.localIP());
     randomSeed(micros());
  }else{
     Serial.print("failed with state ");
     Serial.print(client.state());
     delay(2000);
  }

}



void loop()
{

send_mqtt ();





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

  }

  if (WiFi.status() != WL_CONNECTED)
  {
    setup_wifi();
  }


  delay(250);
}




void callback(char* topic, byte* payload, unsigned int length) {
 Serial.print("Message arrived [");
 Serial.print(topic);
 Serial.print("] ");
 int i = 0;
 for (int i=0;i<length;i++) {
  char receivedChar = (char)payload[i];
  message_buff[i] = payload[i];



  }


}




void reconnect() {

 while (!client.connected()) {
 Serial.print("Connecting...");

 if (client.connect("ESP8266 Client")) {
  Serial.println("connected");

  client.subscribe("ledStatus");
 } else {
  Serial.print("failed, rc=");
  Serial.print(client.state());
  Serial.println("try again");

  delay(10000);
  }
 }
}

void send_mqtt (){
  if(millis()- lastSend > 5000){
    //Serial.println("kirim status");
  String json_strg = "{\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\",\"type\":\"HOME0001\",\"id\":\"HOME\",\"status\":\"OK\"}";
 char *stat = const_cast<char*>(json_strg.c_str());
  client.publish("IOT/STATUS", stat);
  lastSend = millis();
  }
}