Android无法识别RN4020的更新特征值

你好，我正在安卓和RN4020设备之间连接蓝牙低能耗通信。广告和连接功能都很好。Android上的所有服务和特性都是可见的。使用SDF、SDM、SDN等更新的设备信息被Android识别。但问题是，在Android上看不到使用SUW或SHW命令更新的特性值。1）在发送命令“SDM，hello”后，命令“GDM”读取“你好”和“SURR，2A24”读取“6656C6C6F”。Android也看到了“你好”。2)另一方面，在发送命令“SUW，2A24427965”之后，命令“GDM”和“SUR，2A24”读出正确的值（即“再见”或“427965”），但是Android仍然看到由SDM设置的前一个模型名“Hello”。没有帮助。另外，尽管“SUR,2A19”报告“32”，但是Android不识别更新电池电平值“SUW,2A19,32”。我多次浏览RN4020数据表和用户指南，但是找不到任何提示。我怎么了？有人能帮忙吗？谢谢



      以下为原文

    Hi there,
I'm hooking up Bluetooth Low Energy communication between Android and the RN4020 device.
Advertising and connection are perfectly functional. All services and characteristics are visible on Android.
Updated device information using SDF,SDM,SDN,etc. is recognized by Android.
But the problem is, that updated characteristic values using the SUW or SHW commands are not seen on Android.


Here are two examples (using the model name characteristic UUID=2A24).

1) After sending the command "SDM,Hello" the command "GDM" reads "Hello" and "SUR,2A24" reads "48656C6C6F". Android sees "Hello", too. So everything's fine in this case.

2) On the other hand, after sending the command "SUW,2A24,427965", the commands "GDM" and "SUR,2A24" read the correct values (i.e. "Bye" or "427965"), but Android still sees the previous model name "Hello" that was set by SDM.
Rebooting either Android or RN4020 does not help.

Also, updating the battery level value "SUW,2A19,32" is not recognized by Android, even though "SUR,2A19" reports "32".

I worked through the RN4020 datasheet and user guide many times, but I cannot find any hint.
What am I doing wrong? Can anybody help?
Thanks