On 07/07/2019 13:17, druck wrote:
> On 07/07/2019 00:32, Michael J. Mahon wrote:
>
> [Wifi improved after a router restart]
>
>> This could be the result of the laptop “sticking” to the first channel
>> that
>> permits good communication, which deteriorates, but remains “stuck”
>> until a
>> restart of its Wi-Fi results in locking onto the new “best” channel.
>>
>> A complex algorithm operating in a complex, changing communication
>> environment can lead to unexpected behaviors.
>
> Make sure the router isn't set to auto channel selection, as this can
> lead to a different channel being used every time it restarts.

It isnt. Channel 7 on one,channel 13 on the other


And it never restarts except under power cut.

>
> In auto the router will decide which channel to use on the signal
> strengths of other routers _it_ can see, and pick the channel with the
> lowest competing strengths. It often wont be best choice for it's
> clients, some of which might be nearer to the other routers on the
> channel it's picked. You also get in to router wars, where they are
> regularly swapping channels, so you end up with reception varying day to
> day.
>
> Set the router to manual selection, and try each of the main 2.4GHz
> channels 1, 6 & 11, for a week each, to see which works best for all
> your clients. Keep monitoring what other access points are on that
> channel, in case of other routers set to auto coming and going.
>
> ---druck
>
Been there done that. All crap.

Fiddling with settings is what you do first.

example. logging into my Pi which is at least 10 meters away downstairs
and across the house which is connected to a router/WAP that is 20meter+
away from me here, on a still windless sunday afternoon with nothing
moving at all

...wlan0     IEEE 802.11  ESSID:"LivingRoom"
           Mode:Managed  Frequency:2.472 GHz  Access Point:
30:46:9A:A2:89:F6
           Bit Rate=19.5 Mb/s   Tx-Power=31 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Power Management:on
           Link Quality=36/70  Signal level=-74 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:2  Invalid misc:0   Missed beacon:0


wlan0     IEEE 802.11  ESSID:"LivingRoom"
           Mode:Managed  Frequency:2.472 GHz  Access Point:
30:46:9A:A2:89:F6
           Bit Rate=26 Mb/s   Tx-Power=31 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Power Management:on
           Link Quality=35/70  Signal level=-75 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:2  Invalid misc:0   Missed beacon:0


wlan0     IEEE 802.11  ESSID:"LivingRoom"
           Mode:Managed  Frequency:2.472 GHz  Access Point:
30:46:9A:A2:89:F6
           Bit Rate=13 Mb/s   Tx-Power=31 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Power Management:on
           Link Quality=36/70  Signal level=-74 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:2  Invalid misc:0   Missed beacon:0

wlan0     IEEE 802.11  ESSID:"LivingRoom"
           Mode:Managed  Frequency:2.472 GHz  Access Point:
30:46:9A:A2:89:F6
           Bit Rate=14.4 Mb/s   Tx-Power=31 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Power Management:on
           Link Quality=31/70  Signal level=-79 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:2  Invalid misc:0   Missed beacon:0

wlan0     IEEE 802.11  ESSID:"LivingRoom"
           Mode:Managed  Frequency:2.472 GHz  Access Point:
30:46:9A:A2:89:F6
           Bit Rate=13 Mb/s   Tx-Power=31 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Power Management:on
           Link Quality=31/70  Signal level=-79 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:2  Invalid misc:0   Missed beacon:0

So a 2:1 variation in speed over a period of about ten minutes when not
even the plants outside the window are moving

That's all the 2.4Ghz in the house there actually is - the microwave is
off, Im not flying any model planes, the oil monitor is on 433Mhz, and
the TVs are mid UHF band. And the radios are 100MHz band.

The other router is on channel 7 = 2.442 GHz

But it was pants with the old cisco and it  is pants with the brand new
draytek - so much pants that I had to put a netgear in the living room
where there is a RJ45 socket...

So it beiong pants  predates the twin AP setup.

As to why it happens, I dunno. The common factor in the pi amnd the
laptop is broadcpom and linux.

But its not great on my android phone either. 5ft away from the draytek
is showiung maxed out at 72Mbps

walk next doorish to the bedroom and its half that by the time I get
across the room (~7m as the crow flies)


At a similar distance but through a floor ceiling and two walls its
nearly unusable.

Wifi simply doesnt work well in this house.

To the point where it is almost not fit for purpose.

--
Microsoft : the best reason to go to Linux that ever existed.

--- SoupGate-Win32 v1.05