[Tinyos-help] Dropping packet with bad group ID

[Eric Keller]

Sorry I can't help you exactly.  Somehow Matlab hasn't gotten
the message that you want 7D as your group ID.  You can
see that the 10th byte is 7D.  I don't remember how I got
around this problem, I don't think the variable that Matlab is comparing is set
properly.

You're probably going to run into problems with
the java code next.  The code given in the examples
does not properly use the message methods.

So you're going to have to understand the code a little better
to solve this problem.
Eric




2008/6/1 徐 士翔 <ab0912812560 at yahoo.com.tw>:
> hello everyone
>
>
>
> i wanted to let matlab communication with tmote
>
>
>
> i already set up  and change  group ID  as  7D  in  defineTOSEnvironment.m
> and  defineComm.m
>
>
>
> when i connected  Tmote  by matlab,my num clients of SerialForwarder  is 1
> change from 0
>
>
>
>
>
> and when I enter connect('sf at localhost:9001')  in matlab  it shows me
> following message
>
>
>
>>> connect('sf at localhost:9001')
>
> ans =
>
> Thread[Thread-14,5,main]
>
> Dropping packet with bad group ID:1A 01 08 93 1F FF FF FF 0A 7D AA 16 AA 8C
> 06 00 6F 08 72 08 72 08 6F 08 72 08 6F 08 6F 08 6F 08 6F 08 6F 08
> Dropping packet with bad group ID:1A 01 08 94 1F FF FF FF 0A 7D AA 16 AA 8C
> 07 00 5B 09 5B 09 5B 09 5B 09 5B 09 5A 09 5B 09 5E 09 5E 09 5B 09
> Dropping packet with bad group ID:1A 01 08 95 1F FF FF FF 0A 7D AA 16 AA 8C
> 08 00 F3 0A F6 0A F6 0A F7 0A F6 0A F3 0A F3 0A F7 0A F2 0A F7 0A
>
>
>
> i dont know where is problem
>
>
>
> does anyone give me the suggestion?!
>
>
>
>
>
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