Either your AP is a crock of s**te or you have a lot of interference. This place runs wifi from a pair of UAP-AC-Pros which provide a decent signal that usually maxes out the device capabilities throughout the house.
-- Steve O'Hara-Smith | Directable Mirror Arrays C:\>WIN | A better way to focus the sun The computer obeys and wins. | licences available see You lose and Bill collects. | http://www.sohara.org/
-=> The Natural Philosopher wrote to Michael J. Mahon each frequency will have a different spatial distribution of high and low > signal, making coordinated use of multiple sub bands unreliable. > > In a building with smaller and less speculative reflections, such > interference is not problematic, but in your case it is rendering OFDM > almost unusable. The MacBook exception is probably a consequence of its use > of MIMO antennas which a much more difficult in a smaller form factor.
LOL!!!
TNP> That is the first half believeable scenario anyone has come up TNP> with.
Right...
TNP> However it doesn't explain massive fluctuations from two totally TNP> stationary systems with any movement - me - in another room TNP> altogether. Or why dumping wifi and re-enabling it takes the TNP> laptop from 1Mbps to 58Mbps
The more likely explanation is that your router(s) are from about
1995, like the rest of your equipment.Whatever you do, don't upgrade anything though. That might correct the problem...
... He does the work of 3 Men...Moe, Larry & Curly === MultiMail/Linux v0.52
same with a cisco router, with a draytek router and with a netgear router.
Same with every client except possibly apple laptop.
or you have a lot of
No interference at all. Nothing within 300 meters of my house.
Just metal walls and ceilings :0(
So a cardboard modern house?
I cant even max out my broadcomm chips sitting next to the APs...
-- "It is an established fact to 97% confidence limits that left wing conspirators see right wing conspiracies everywhere"
Yes, and that has the advantage of being more easily replaced. The USB-3 has the slight advantage of being a little more compact.
-- Cheers, David Web: http://www.satsignal.eu
Get one with a usb 3.1 gen2 interface (will probably be a usb-c connector, obviously you would need a usb-c to usb-a cable, probably in the box if not extreme bargain basement). I use a Samsung T5 500 GB as my system drive for an iMac where I ran out of space on the built-in "fusion drive". I don't notice it being slower, might even be a bit faster in some situations like boot up. I wouldn't get a 250 GB version, they are usually a lot slower. This one or Sandisk Extreme Portable are probably good.
Nope. Not even fluorescent ones!
Even the LV are toroidal. Not SMPS
summat wrong wit your sig separator. looks like no CRLF after the --
-- "The great thing about Glasgow is that if there's a nuclear attack it'll look exactly the same afterwards." Billy Connolly
I suspect that your problem with Wi-Fi is not interference in the conventional sense, but interference in the sense of constructive and destructive interference.
The metal walls and ceilings create a cavity excited by Wi-Fi transmitters, creating myriad regions of high and low signal strength separated by inches.
Since Orthogonal Frequency Division Multiplexing uses multiple frequencies, each frequency will have a different spatial distribution of high and low signal, making coordinated use of multiple sub bands unreliable.
In a building with smaller and less speculative reflections, such interference is not problematic, but in your case it is rendering OFDM almost unusable. The MacBook exception is probably a consequence of its use of MIMO antennas which a much more difficult in a smaller form factor.
-- -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
?...less specular...? before autocorruption...
-- -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
That is the first half believeable scenario anyone has come up with.
However it doesn't explain massive fluctuations from two totally stationary systems with any movement - me - in another room altogether. Or why dumping wifi and re-enabling it takes the laptop from 1Mbps to
58Mbps-- "The great thing about Glasgow is that if there's a nuclear attack it'll look exactly the same afterwards." Billy Connolly
Actually, it could. It is unlikely that the metal in the walls makes contact with adjoining walls everywhere. The result is ?slot coupling? which would allow the maxima and minima in an adjoining room to move some in response to changes in the environment of the first room.
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.
-- -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
No. 2019. Draytek is brand new
All cversions of linux ae fully up to date.
All wifi client hardware is less than three year old, apart from one old trouter that is neing ussed as a WAP.
I do understand how I must challenge your worldview that insists that 'shiny new thing make everything better'
But sometimes shiny new thing is just more full of shit than battered old thing ever was
-- "Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them" Margaret Thatcher
So long as the metal isn't between the AP and client that should be no problem, it will of course pretty much kill the signal dead passing through the metal. Wifi in that environment is going to be a room by room thing, no fun.
Modern yes (five years old), cardboard no. It's a floor and a half bungalow with the two APs ceiling mounted just under the ridgeline. There's a lot of foil backed foam insulation in the roof which makes a fairly effective V reflector retaining the signal inside the house and spreading it. Upstairs has only a few stud walls, the floor/ceiling is the usual joists with OSB on top and plasterboard below construction which is pretty much transparent to microwaves. The walls downstairs are all concrete block but very few direct signal paths go through one and those get boosted by indirect paths. There are probably deadish spots in odd corners but nowhere you'd put a device.
That is terrible. I've yet to see a client that doesn't max out pretty much everywhere in the house.
-- Steve O'Hara-Smith | Directable Mirror Arrays C:\>WIN | A better way to focus the sun The computer obeys and wins. | licences available see You lose and Bill collects. | http://www.sohara.org/
Nice analysis, I've only just read and responded to the metal walls bit with the obvious problem of getting signal through them and hadn't thought through the behaviour inside the room.
-- Steve O'Hara-Smith | Directable Mirror Arrays C:\>WIN | A better way to focus the sun The computer obeys and wins. | licences available see You lose and Bill collects. | http://www.sohara.org/
e first channel that
uck? until a
? channel.
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.
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
It isnt. Channel 7 on one,channel 13 on the other
And it never restarts except under power cut.
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:0wlan0 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:0wlan0 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:0wlan0 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:0wlan0 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:0So 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.
If Michael Mahon's theory is correct you may get best results by turning the output power down.
-- Steve O'Hara-Smith | Directable Mirror Arrays C:\>WIN | A better way to focus the sun The computer obeys and wins. | licences available see You lose and Bill collects. |
tried that. Not really any different.
-- ?But what a weak barrier is truth when it stands in the way of an hypothesis!? Mary Wollstonecraft
Well you'll just have to put up with life being unfair, and all that.
---druck
Yup. Life is rough, tough and depreately unjust, so get on with it.
In a fit of 'sod this' I moved te netgear pretending to be a WAP to the kitchen where there is ethernet over mains for the telly. It can hied behind the telly.
That has made the kitchen pretty good for wifi and the pi is just the other side of the kitchen wall and is now much happier.,
Curiously the bedroon above the kitchen now has improved wifi too - the floors and ceiling are metal backed plasterboard but between oak beams so there are RF slots in it
This has left the living room and patio RF deserts so I am thinking of a USB powered router since that telly has USB ports, and there is ethernet there...
Is it Ok to put three WAPS on the same SSID/password but on different channels?
-- ?Some people like to travel by train because it combines the slowness of a car with the cramped public exposure of ?an airplane.? Dennis Miller
Answering my question.
No.
The laptop absolutely goes mad, apperently swapping between two different WAPS and disconnecting
Another 'wifi works' myth debunked
>-- Religion is regarded by the common people as true, by the wise as foolish, and by the rulers as useful. (Seneca the Younger, 65 AD)
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