I defined Custom Hook for Bluetooth adapted state because of we can only perform all Bluetooth operations, If Bluetooth adapter is "PoweredOn". So before perform the operation we should check the adapter state. That's why I defined the custom hook. whenever we needed we use it.

BLEAdapterStateListerner.js

import { useState, useEffect } from "react";
import { BleManager } from "react-native-ble-plx";

const _BleManager = new BleManager();

const useBluetoothListener = () => {
  const [isBluetoothOn, setIsBluetoothOn] = useState(false);

  useEffect(() => {
    const bleSubscription = _BleManager.onStateChange((state) => {
      if (state == "PoweredOn") {
        setIsBluetoothOn(true);
      } else if (state == "PoweredOff") return setIsBluetoothOn(false);
      else if (state == "Resetting") return null;
      else console.log("bluetooth listener error",state);
    }, true);

    return ()=> {
        bleSubscription.remove();
    }
  }, []);

  return isBluetoothOn;
};

export default useBluetoothListener;