[Nottingham] OK, where has 9/10 of my network gone?

[Luke]

A further suggestion... using tomato firmware here, but it ought to
still apply: power much over 80mW doesn't bring additional benefits, so
I've maxed out there, instead of the 400mW offered (as per benchmarking
I've seen online). Another big improvement here, particularly for iPad
use, is the width of your channel. If you can change it to 20Mhz
instead of 40 you may see an improvement, depending on the device. Speed
or range. 

Finally, you can set a router option with some firmware to use Japanese
channels, opening up channel 14 which is the next non-interfering
channel up from 1, 6 and 11. Pretty sure none of your neighbours will be
on that - may at least be able to narrow down the issue.

Oh, one *final* thing would be to check for spurious RF. I recently
diagnosed bad TV signal to an ungrounded/unshielded HDMI cable from rpi
to TV. It went from no reception on certain HD channels to full signal.
This is after buying/installing a new aerial in the loft (needed doing
anyway...) and using a signal meter to check for optimal positioning...
I replaced said cable with a cheap Amazon one and the problem was
resolved (also grounding the TV seemed to work, but that was a messy
solution and not quite as effective). So if your router is behind the
telly, maybe you're being swamped by some poor loud electronics?

Luke

On Mon, Mar 21, 2016 at 10:46:55AM +0000, Martin wrote:
> For Android, yep, I make good use of an old version of WiFi Analyzer.
> 
> There must be similar utilities directly for Linux...? ;-)
> 
> 
> For some background on the confusion of channel allocations for 2.4GHz
> WiFi, see:
> 
> http://nottingham.lug.org.uk/2013/01/what-wifi-channel/3840
> 
> For my locality, there's at least 6 neighbouring WiFi SSIDs and we are
> all nicely cooperating on using only channels 1, 6, and 11. Until that
> is some occasional ninny switches on and splatters us all with noise
> from channel 10...
> 
> 
> Aside:
> 
> WiFi is low power radio and other electronic equipment can wipe you out
> with noise for a 1 metre exclusion zone...
> 
> 
> See what you can see...
> 
> Good luck,
> 
> Cheers,
> Martin
> 
> 
> On 21/03/16 08:26, Aaron Jackson wrote:
> > There is as another nice all called WiFi Analyzer which helps visualise
> > your signal quality next to everyone else around you. Worth a try!
> > 
> > Aaron
> > 
> > 
> > Jason Irwin writes:
> > 
> >> On 19 March 2016 at 21:39, Aaron Jackson <aaron at aaronsplace.co.uk> wrote:
> >>> Just to check it wasn't the terrible Broadcom chip in my laptop,
> >>> I also tried it from my phone to desktop and got the same speed.
> >> Have just run the test from my aging phone, and it got a suck ~35Mbps.
> >> Consistent at least.
> >>
> >> In other news, "iperf" is an app available via Google Play. Neat.
> >>
> >> I'm wondering if I need to beg/borrow/steal and EMF analyser......
> >>
> >> J.
> 
> 
> 
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