RFCOMM协议的套接字通信，它不是低蓝牙
https://en.wikipedia.org/wiki/List_of_Bluetooth_protocols

First of all, you have to notice this library is for socket communication using RFCOMM protocol which is not Low Bluetooth https://en.wikipedia.org/wiki/List_of_Bluetooth_protocols

如果您需要帮助，我需要更多的信息，作为你的android版本，你的代码片段和你的日志。

If you want help, I need more informations, as your android version, a piece of your code and your logs as well.

此外，您可以在此游戏中查看此库 https://play.google.com/store/apps/details?id=com.drgames.domino 在蓝牙中使用一台服务器和3台客户端。

Moreover, you can see this library in work on this game https://play.google.com/store/apps/details?id=com.drgames.domino Using one server and 3 clients in bluetooth.