N9301 Unit-AudioPlayer音乐播放模块不能接收到新音乐的id
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我在用这个模块开发原型，我参考了这个文档Unit-AudioPlayer-Protocol-CN，还用了官方的demo。
我要自动按顺序播放，需要自动显示当前播放的MP3文件名字。
文档中有着一段：
1.2.3 协议约定： 新曲目播放时会发送曲目序号。 这里的序号为全盘统一编号的序号我理解是我可以不用轮询，直接接受这个模块发过来的音乐文件id。
但是实际测试过程中，新曲目播放时并不会收到这个自动发送的曲目序号。
这是怎么回事？我是在不行轮询获得，cpu还要收集别的传感器的数据
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