[Tinyos-help] problem with short packet in tmote ...

[José Ulloa Suárez]

Hi, i found  your question  posted  in the TinyOS Mail List. Nowaday
we've been experiencing the same problem with a short packet.
Can you help me if you have found the answer?, or guide us with your
experience in with this problem.
In this link somebody have the same problem:
http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2006-January/014213.html 


My tinyos version is 1.1.11-3is
Thank you very much.



__
Jose Ulloa S

Hemanth H escribió:
> Hi
>
> I am using SurgeTelos application to sample an sensor at 100 samples 
> per second. I am sending the sampled data through the multihop to the 
> base node.(the base node is also sampling data and sending thru UART 
> to the comp). I am using about 3 hops max currently and only 4 nodes . 
> I have made the following changes to the SurgeMsg packet format. First 
> have changed the seqno from 32 bit to 16 bit. Then I have increased 
> the no of readings from 1 to 6 in a packet.
>
> I have also made changes to the MultiHopLQI library. First I have 
> increased MHOP_QUEUE_SIZE from 2 to 20 and MHOP_HISTORY_SIZE from 4 to 
> 40. I did get significant performance improvement with this change. I 
> have not changed the MAC and retained it as it is.
>
> I am using the oscilloscope application to display tha data. I have 
> used MIG to modify the oscilloscope app. and I am also displaying the 
> debug information .
>
> Now with this configuration I run all the nodes at RF power 1 so that 
> the testing is easier.
>
> I am facing the following problem
>
> 1 I am having high error rates, How can I improve performance without 
> changing the MAC for now.
> 2 When I run the setup and the oscilloscope application the setup runs 
> for several seconds properly and then I get an error as follows.
> The packets of the base node are not having any problems but all other 
> packets through the radio are having problems. i.e I am only getting 
> the header but the body is missing.
>
> Can anybody tell me what I am doing wrong.
>
>
>
> 726
> receive error for net.tinyos.oscil.OscopeMsg (AM type 17): invalid 
> length messag
> e received (too short)
> receive error for net.tinyos.oscil.OscopeMsg (AM type 17): invalid 
> length messag
> e received (too short)
> message recieved
>
> Oscope message recieved
> Message <OscopeMsg>
>  [sourceaddr=0x0]
>  [originaddr=0x0]
>  [seqno=0x0]
>  [originseqno=0x1]
>  [hopcount=0x0]
>  [type=0x0]
>  [data=0x53 0x3f 0x50 0x44 0x59 0x3b ]
>  [parentaddr=0x7e]
>  [seq_no=0x2d7]
>
> Output from the Listen application
>
> 00 21 08 EF FF FF 7E 00 11 7D
> 1C 00 00 00 00 00 7E 00 11 7D 00 00 00 00 00 00 04 00 00 00 00 00 3B 
> 08 48 08 42
> 08 4B 08 3D 08 52 08 7E 00 9D 08
> 00 21 08 23 FF FF 7E 00 11 7D
> 00 21 08 F0 FF FF 7E 00 11 7D
> 00 21 08 25 FF FF 7E 00 11 7D
> 1C 00 00 00 00 00 7E 00 11 7D 00 00 00 00 00 00 04 00 00 00 00 00 33 
> 08 4F 08 3F
> 08 52 08 3E 08 52 08 7E 00 9F 08
> 00 21 08 26 FF FF 7E 00 11 7D
> 00 21 08 F2 FF FF 7E 00 11 7D
> 1C 00 00 00 00 00 7E 00 11 7D 00 00 00 00 00 00 04 00 00 00 00 00 7E 
> 08 2C 08 4A
> 08 47 08 4F 08 4A 08 7E 00 A0 08
> 00 21 08 F3 FF FF 7E 00 11 7D
> 1C 00 00 00 00 00 7E 00 11 7D 00 00 00 00 00 00 04 00 00 00 00 00 42 
> 08 4E 08 4A
> 08 4F 08 43 08 4D 08 7E 00 A1 08
> 00 21 08 28 FF FF 7E 00 11 7D
> 00 21 08 F5 FF FF 7E 00 11 7D
> 1C 00 00 00 00 00 7E 00 11 7D 00 00 00 00 00 00 04 00 00 00 00 00 46 
> 08 57 08 40
> 08 58 08 3F 08 50 08 7E 00 A2 08
>
> regards
> hemanth
> _______________________________________________
> Tinyos-help mailing list
> Tinyos-help at Millennium.Berkeley.EDU
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>