[Tinyos-help] BaseStation Packet Format?

[Chong Hui Kim]

Dear all,

I've wrote the user program to display all serial packet from USB port in Linux. (/dev/ttyUSB0)

One mote was programmed in Oscilloscope and the other was in BaseStation. (in Tinyos 2.0)

Following is the received all serial data.

7E 45 00 FF FF FF FF 1C 00 93 00 00 8F ........

In my thought,
7E - HDLC_FLAG_BYTE
45 - SERIAL_PROTO_PACKET_NOACK
00 - TOS_SERIAL_ACTIVE_MESSAGE_ID
FF FF - DESTINATION ADDRESS
FF FF - SOURCE ADDRESS
1C - LENGTH
00 - what means?
93 - TYPE

What means last '00' and why is group id not shown?

Thanks in advance.

Chong Hui Kim.
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