Read / Write BLERemoteCharacteristic like stream or serial

[softwarecrash]

Hello,
i hope anyone can help me with my little problem.

i have a Bluetooth device that act like a serial interface, it wait for data like A503000.... and answer with similar
over wire it works perfect, so it exist a Bluetooth dongle for this device that "replace" the wire and give me the serviceUUID: 0xfff0

so i have a library/function that build and send this data, and receive it and split it in readable pieces, badly the library need a stream class where it can send and receive.

any chance to build a function that create a stream class like a serial with read, write, flush, available... from the BLERemoteCharacteristic?

the BluetoothSerial library doesn't work, it cant discover or connect this Bluetooth device.