I can’t make bluetooth connected for all fragments, you need to connect to all fragments once.

import android.bluetooth.BluetoothAdapter
class BluetoothController(private val adapter: BluetoothAdapter) {
    private var connectThread: ConnectThread? = null

    fun connect(mac: String, listener: Listener){
        if(adapter.isEnabled && mac.isNotEmpty()){
            val device = adapter.getRemoteDevice(mac)
            connectThread = ConnectThread(device, listener)
            connectThread?.start()
        }
    }
    fun sendMessage(message: String){
        connectThread?.sendMessage(message)
    }

    fun closeConnection(){
        connectThread?.closeConnection()
    }
    companion object{
        const val BLUETOOTH_CONNECTED = "Bluetooth соединение подключено"
        const val BLUETOOTH_NO_CONNECTED = "Bluetooth соединение отключено"
    }
    interface Listener{
        fun onReceive(message: String)
    }
}

 else if (item.itemId == R.id.id_bt_connect) { // Подключение к ESP32.
                bluetoothController.connect(mac ?: "", this@MainFragment)
                Toast.makeText(requireActivity(), "Подключение к маяку", Toast.LENGTH_SHORT).show()
            }

 else if (item.itemId == R.id.id_bt_connect) { // Подключение к ESP32.
                bluetoothController.connect(mac ?: "", this@ColorGlow)
                Toast.makeText(requireActivity(), "Подключение к маяку", Toast.LENGTH_SHORT).show()
            }

I don`t know

for some reason, the problem is not solved, when switching to another fragment, the Bluetooth connection is lost, and it is not possible to make a Bluetooth connection to all fragments at once.