R60A fall detection protocol

Hello,

I am using the Seeed fall detection radar R60A. The new radars I got came with the following hardware/firmware:
1.0.1 / SFD1.SY-01.02.07

The radar generates the following messages:

801000000000. (control char is 0x80, command word 0x10
801000000002
etc

What are those messages? I could find any documentation in the API.

Those messages are strange because the len is 0.

The other messages sent by the radar are fine.

Thanks,