[Commotion-announce] Very bad ETX
L. Aaron Kaplan
aaron at lo-res.org
Fri Mar 6 04:03:23 EST 2015
On Feb 27, 2015, at 6:22 AM, Josh Harle <josh.harle at gmail.com> wrote:
> With distance the ETX does not improve. I moved it in stages up to about 20 metres away, and the ETX has gone up to 7.9.
>
Another thing to consider: ETX is just a synthetic metric / measurement which actually captures packet loss.
So, theoretically there could be way more effects involved than just the short distance (which for sure will be a problem):
* faulty pigtail cables
* faulty antennas
* faulty radio
* bugs in the software version which cause packet loss
etc.
Probably one trick would be to nail down the root cause and then see if a change there results in the desired outcome.
Best,
a.
> Kind Regards,
>
> Dr Josh Harle
> ____________________
> http://joshharle.com
> http://tacticalspace.org
> ph: +61 (0)409 771 163
>
> On 27 February 2015 at 15:37, Adam Longwill <adam.longwill at gmail.com> wrote:
> Try moving them much farther away from each other. I have seen that problem too and its because they may be too close. Andy Gunn informed me of the phenomenon.
>
> On 26 Feb 2015 23:35, "Josh Harle" <josh.harle at gmail.com> wrote:
> Hi All,
>
> I had assumed that my very bad ETX was due to a problem with tx power, but I think I was wrong. I currently have two Picostation M2HPs 3 metres from each other getting an ETX of between 4 and 6.
>
> Something seems to be wrong there!
>
> Is there some obvious troubleshooting I could be doing?
>
> What do people think the problem is?
>
> Kind Regards,
>
> Dr Josh Harle
> ____________________
> http://joshharle.com
> http://tacticalspace.org
> ph: +61 (0)409 771 163
>
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