[Tinyos-help] A lot of Bad packet messages printed in the prompt window

[Maisa Ben Jamaa]

Hi,

OK, So the problem is about short delay between the transmissions.
Grateful for your answer.

Best regards,
Maissa Ben Jamaâ

2009/7/19 Michael Schippling <schip at santafe.edu>

> I found the "retraction period" to be significant in my
> reliability testing that I've previously ref'ed. Things
> were greatly improved by putting a small delay between the
> reception of a message and the sending of a new message
> at the host end. I don't know if this a host effect or
> slow switching from receive to xmit on the radio end.
> It was much more pronounced on the mica2's than the 'Z's.
> I didn't do any extensive testing with the telosb.
>
> MS
>
> Maisa Ben Jamaa wrote:
>
>> Hi,
>> Umm, so this can be like a collision that was being happening over the
>> serial communication channel.
>> Thank you Faisal
>>
>> 2009/7/18 Faisal Aslam <aslam at informatik.uni-freiburg.de <mailto:
>> aslam at informatik.uni-freiburg.de>>
>>
>>    Hi,
>>
>>    I also have this error if I send packet from mote too fast (Usually
>>    in a loop). If you can have a small delay between packets being send
>>    from mote then you will have lesser bad packets errors.
>>
>>    best regards,
>>    Faisal
>>
>>    Maisa Ben Jamaa wrote:
>>
>>        Hi,
>>
>>        If tinyos reports a lot of bad packet messages during a pc and
>>        sensor mote
>>        communication based on an usb connection, so in your opinion why
>>        this,
>>        is happening?
>>
>>        Precisely, what causes that the *packet crc* is different from
>>        the computed one?
>>        (more details can be found in Packetizer.java file)
>>
>>        Best regards,
>>        Maissa Ben Jamaa
>>        _______________________________________________
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>>
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>>
>>
>>
>>
>>
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