[Tinyos-devel] TelosB as base station?

[Joe Polastre]

Does the problem occur immediately or after some time?  From what I
recall, the DCO isn't being continuously recalibrated in the TinyOS
2.x release.  Temperature changes as small as 10 degrees can adversely
affect the mote (ie, the exhaust fan on your laptop turning on and
blowing hot air at your mote).  Also, the DCO drifts over time, and
can be significant.

Just an FYI.

-Joe

On 7/5/07, Matt Welsh <mdw at eecs.harvard.edu> wrote:
> Hi folks,
>
> We have been having continued problems with using a TelosB mote as a
> base station and I'm wondering if there's something we're doing wrong.
> Basically, using BaseStationCC2420 on a TelosB along with the C-based
> serialforwarder is just incredibly unstable. It seems to hang after
> bursts of packets and we usually have to restart the base station mote.
> (The code in support/sdk/c/serialsource.c also prints the quite useful
> error message 'foo' - apparently when no data is available on the serial
> port - we commented that out long ago.)
>
> Not sure if this is a problem with the TelosB, the sf, or both. I
> remember having similar problems with TinyOS 1.x and am somewhat
> surprised this hasn't been resolved in 2.x - or maybe it has and we
> don't know the fix?
>
> We do find that MicaZ motes are very stable as base stations (running
> for weeks at a time without any hang).
>
> Thanks -
> Matt
>
>
>
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