Hi,
I've got a WiFI router ADSL thingy on one side of the house (by the phone socket).
At certain times of the day I have trouble getting connected from the far side of the house.
I can usually see 6-10 other SSIDs, so was guessing this was someone nearby having their device
on and colliding, but only sometimes.
So I left this running on a RasPi:
while true; do ( date "+%Y%m%d%H%M" ; iwlist wlan0 scan | egrep "Channel:" ) > $(date "+%Y%m%d%H%M").log ; sleep 300 ; done
Well, now I've got some data:
for ((i=1;i<14;i++)); do printf "Channel:%02d = " $i ; ( grep "Channel:$i" *.log | wc -l ) ; done
And the results:
Channel:01 = 1504 Channel:02 = 26 Channel:03 = 0 Channel:04 = 0 Channel:05 = 0 Channel:06 = 741 Channel:07 = 0 Channel:08 = 0 Channel:09 = 0 Channel:10 = 0 Channel:11 = 223 Channel:12 = 0 Channel:13 = 0
I know channels 1,6&11 are the non-overlapping ones, but isn't this a bit...skewed???!?
(Now off auto-selected Channel 1, thanks Netgear, and manually set to Channel 9).
On 14/11/16 14:48, Bill Hill wrote:
while true; do ( date "+%Y%m%d%H%M" ; iwlist wlan0 scan | egrep "Channel:" ) > $(date "+%Y%m%d%H%M").log ; sleep 300 ; done for ((i=1;i<14;i++)); do printf "Channel:%02d = " $i ; ( grep "Channel:$i" *.log | wc -l ) ; done
Nice script! Interesting to note, I just moved to systemd: here it's not called wlan0 any more (it's wlp2s0, in my case at least).
I know channels 1,6&11 are the non-overlapping ones, but isn't this a bit...skewed???!? (Now off auto-selected Channel 1, thanks Netgear, and manually set to Channel 9).
A quick check around me here in Diss gets similar results. Channel 48 is popular too in the 5GHz range. I would guess it's programmed in the router firmware, particularly BT gear as that's what almost all the networks around me are. Apparently the 1 - 6 - 11 rule is not hard-and-fast and you may benefit from using a different channel (as you did).
pd
On 14/11/16 17:28, Pete Dowdell wrote:
I would guess it's programmed in the router firmware, particularly BT gear as that's what almost all the networks around me are. Apparently the 1 - 6 - 11 rule is not hard-and-fast and you may benefit from using a different channel (as you did).
If I set my router to "auto-select" the channel, it always picks the same one, and usually a busy one. I use Wifi Analyser on my android mobile, It has a graph which shows which channels are in use (their centre and the amount they're overlapping other bands) and how strong they are. This is quite useful in working out which to use on my router. It also recommends best channels to use, and it's usually right.
Cheers Steve
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Bill Hill -
Pete Dowdell -
steve-ALUG＠hst.me.uk