Real time interaction when data changes in firebase with esp32

Official Hardware Nano Family Nano ESP32
1

I'm actually working on project with esp32 and firebase real time database where I store the temperature and the humidity and the led state, I have control over the led with an app when I press on it changes led value to 1 and when off to 0
What I want is that whenever I press a button the logic of the LED executes immediately something like setting up a listener to LED
here is the structure of my firebase { "LED": 0, "humidity": 34, "temp": 23.4 }

and here is my logic for the esp 32

#include <ESP32Firebase.h>
#include <WiFi.h>
#include <DHT.h>
#include <ArduinoJson.h>
#define DHTPIN 4
#define DHTTYPE DHT11


#define _SSID "wifi"                 // Your WiFi SSID
#define _PASSWORD "code"  // Your WiFi Password

#define REFERENCE_URL "url"
const int ledPin = 5;

Firebase firebase(REFERENCE_URL);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
  dht.begin();
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();


  // Connect to WiFi
  Serial.print("Connecting to: ");
  Serial.println("Wifi1811");
  WiFi.begin(_SSID, _PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print("-");
  }

  Serial.println("");
  Serial.println("WiFi Connected");
}

void loop() {
  firebase.json(true);
  String data = firebase.getString("HouseInfos");
  Serial.println(data);
  StaticJsonDocument<96> doc;
  deserializeJson(doc, data);
  float temp = doc["temp"];
  float humid = doc["humidity"];
  int LED = doc["LED"];

  if (LED == 0) {
    digitalWrite(ledPin, LOW);
  } else if (LED == 1) {
    digitalWrite(ledPin, HIGH);
  }

 readSensor();
}

void readSensor() {
   float humidity = dht.readHumidity();  // Read humidity
  float temperature = dht.readTemperature();

  firebase.setFloat("HouseInfos/humidity", humidity);
  firebase.setFloat("HouseInfos/temp", temperature);
  Serial.println("data written");
}