8852bu AP all 5GHZ NO IR #339

MEL1H · 2023-11-27T23:49:58Z

MEL1H
Nov 27, 2023

Hello,

I have installed 8852bu driver from morrownr script, thank you for that. I use rpı 4B aarch64 bookworm. Issue is what ever I do for changing country code of phy#1 failed. I have disabled built in wifi there for there is only 1 wlan. Is there anybody who managed to run this device in 5ghz ap?

global
country US: DFS-FCC
(902 - 904 @ 2), (N/A, 30), (N/A)
(904 - 920 @ 16), (N/A, 30), (N/A)
(920 - 928 @ 8), (N/A, 30), (N/A)
(2400 - 2472 @ 40), (N/A, 30), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
(5250 - 5350 @ 80), (N/A, 24), (0 ms), DFS, AUTO-BW
(5470 - 5730 @ 160), (N/A, 24), (0 ms), DFS
(5730 - 5850 @ 80), (N/A, 30), (N/A), AUTO-BW
(5850 - 5895 @ 40), (N/A, 27), (N/A), NO-OUTDOOR, AUTO-BW, PASSIVE-SCAN
(5925 - 7125 @ 320), (N/A, 12), (N/A), NO-OUTDOOR, PASSIVE-SCAN
(57240 - 71000 @ 2160), (N/A, 40), (N/A)

phy#1 (self-managed)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (6, 20), (N/A), NO-80MHZ, NO-160MHZ
(2457 - 2482 @ 20), (6, 20), (N/A), AUTO-BW, NO-80MHZ, NO-160MHZ, PASSIVE-SCAN
(5170 - 5330 @ 160), (6, 20), (N/A), PASSIVE-SCAN
(5490 - 5730 @ 160), (6, 20), (N/A), PASSIVE-SCAN
(5735 - 5895 @ 160), (6, 20), (N/A), PASSIVE-SCAN

Answered by morrownr

Nov 28, 2023

Hi @MEL1H

Did you run?

sudo raspi-config > Localisation Options > WLAN Country

A little background: It took so much time getting this driver in good enough shape to handle managed mode that I did very little testing with AP mode. In fact, I did a quick and dirty with 2.4 GHz. This driver came from Realtek in bad shape, however, the previous version, 8852au, was in even worse shape and I refused to release the driver. I also decided to never look at it again and just try to warn Linux users away from the 8852au chipset. I was able to get this driver in good enough shape in managed mode that I though it would work for some people.

I don't know when I will have time to work on this driver ag…

View full answer

morrownr · 2023-11-28T01:26:48Z

morrownr
Nov 28, 2023
Maintainer

Hi @MEL1H

Did you run?

sudo raspi-config > Localisation Options > WLAN Country

A little background: It took so much time getting this driver in good enough shape to handle managed mode that I did very little testing with AP mode. In fact, I did a quick and dirty with 2.4 GHz. This driver came from Realtek in bad shape, however, the previous version, 8852au, was in even worse shape and I refused to release the driver. I also decided to never look at it again and just try to warn Linux users away from the 8852au chipset. I was able to get this driver in good enough shape in managed mode that I though it would work for some people.

I don't know when I will have time to work on this driver again as health problems have slowed me down and I have other things higher on my priority list.

You won't like what I am going to say but if it were me, I'd sent your adapter back to get my money back and look for something in the Plug and Play list here. The site Menu Menu is:

https://github.com/morrownr/USB-WiFi

I recommend reading menu items one and two as a minimum.

If you want an adapter that can do WiFi 6 AP mode, you have several adapters to pick from that use the Mt7921au chipset. The driver, mt7921u, is in-kernel and is well maintained by Mediatek. The difference in the WiFi 6 class adapter drivers between Mediatek and Realtek is like night and day at this point. I use an Alfa AXML as a WiFi 6, 5 GHz AP. The Alfa AXM should work well also and costs less. I use an Alfa ACM for 2.4 GHz as my Pi4B is dual band.

I have an AP guide on the Main Menu, it is menu item 9. The line under the guide is a sample WiFi 6 hostapd.conf if you are interested.

Anyway, maybe this helped.

@morrownr

1 reply

MEL1H Nov 28, 2023
Author

Thank you for your well explained and long message. Driver realy works well if I use it as client, really great job.

After I wrote this message here, I gave up (I was tired and angry :) ) and I started return process. I have already checked your in kernel usb dongles and ordered comfast 951AX (and vertical usb 3.0 adapter). Should I cancel it and order alfa? Wifi range is not a problem cause I will use it in one room.

morrownr · 2023-11-28T15:42:32Z

morrownr
Nov 28, 2023
Maintainer

Driver realy works well if I use it as client, really great job.

Thanks. It took a lot of work. It is annoying that it should take so much work. I'm hoping we see things improve as code has already gone into the Linux kernel to stop non-standards compliant wifi drivers starting with WiFi 7. That will prevent these Realtek out-of-kernel drivers from working as they are currently written so maybe that will cause a change.

I gave up (I was tired and angry :)

I get that. Been there, done that. This is one of the main reasons I decided to start this site.

...ordered comfast 951AX (and vertical usb 3.0 adapter). Should I cancel it and order alfa? Wifi range is not a problem cause I will use it in one room.

I have a 951AX adapter. This message is going through it as I changed out my Alfa AXML on my Pi4B AP. I have to change adapters a lot so as to do testing. There are 2 walls and about 15 feet between my desktop system and the Pi4B AP. I'm on channel 36 which has some congestion but here is what I am seeing:

$ iperf3 -c 192.168.1.24
Connecting to host 192.168.1.24, port 5201
[  5] local 192.168.1.127 port 35230 connected to 192.168.1.24 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  47.0 MBytes   394 Mbits/sec    0   1.29 MBytes       
[  5]   1.00-2.00   sec  48.8 MBytes   409 Mbits/sec    0   1.70 MBytes       
[  5]   2.00-3.00   sec  47.5 MBytes   398 Mbits/sec    0   1.70 MBytes       
[  5]   3.00-4.00   sec  46.2 MBytes   388 Mbits/sec    0   1.70 MBytes       
[  5]   4.00-5.00   sec  47.5 MBytes   398 Mbits/sec    0   1.80 MBytes       
[  5]   5.00-6.00   sec  48.8 MBytes   409 Mbits/sec    0   1.90 MBytes       
[  5]   6.00-7.00   sec  47.5 MBytes   398 Mbits/sec    0   1.90 MBytes       
[  5]   7.00-8.00   sec  45.0 MBytes   377 Mbits/sec    0   1.90 MBytes       
[  5]   8.00-9.00   sec  48.8 MBytes   409 Mbits/sec    0   2.00 MBytes       
[  5]   9.00-10.00  sec  47.5 MBytes   398 Mbits/sec    0   2.00 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   474 MBytes   398 Mbits/sec    0             sender
[  5]   0.00-10.00  sec   472 MBytes   395 Mbits/sec                  receiver

iperf Done.

wavemon is showing signal level -49 dBm and link quality 87%. It certainly does not have the range of my Alfa AXML but that is not bad so if you are same room, I don't see a problem.

I use one of the right angle usb adapter to mount the adapter in the Pi4B. It works well. One thing I have documented is the 951AX won't work with extension cables or powered hubs. It is a low cost adapter so you can't expect perfection but for what you are doing, I don't see a problem.

If your AP setup is a bridged setup, I recommend you take a hard look at my AP guide as it has been polished over several years. There are many ways to set up an AP. My guide uses systemd.networkd and hostapd. This guide should provide you with a rock solid, 24/7/365 AP. The guide has internal examples of hostapd.conf for WiFi 5. The example for WiFi 6 is in a separate document right under the guide. I still call it a release candidate but it seems ultra solid so I guess should do away with the RC status. If you have any questions, you can post an issue in issues on the Main Menu.

Good luck.

@morrownr

1 reply

MEL1H Nov 28, 2023
Author

I will definitely follow your guide but I am little scared if I use bridge mode. Because whenever I do that, I lost ssh access to my rpi. Therefore I prefer to do dhcpcd dnsmasq hostapd method.

Today I saw a post about thermal throttling on 951ax. Have you ever experienced something like that?

https://forum.openwrt.org/t/best-usb-wifi-dongle-for-raspberry-pi-4b/160103

morrownr · 2023-11-28T16:51:42Z

morrownr
Nov 28, 2023
Maintainer

I am little scared if I use bridge mode.

I just did a quick test. See below. ssh is working fine with RasPiOS 10-10-23 (bookworm). It was broken when 10-10 was released but a system update fixed the problem.

$ ssh [email protected]
[email protected]'s password: 
Linux RasPi4B 6.1.0-rpi6-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.58-1+rpt2 (2023-10-27) aarch64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Mon Nov 27 18:58:12 2023

Because whenever I do that, I lost ssh access to my rpi.

Was it because your Pi IP address changed?

You can set a fixed IP address.

Today I saw a post about thermal throttling on 951ax. Have you ever experienced something like that?

No. The mt7921au chipset is a low power chipset only using a max of about 260 mA when at max speed. My first guess as to the problem the poster talked about would be a manufacturing problem. It happens.

0 replies

MEL1H · 2023-11-28T20:24:17Z

MEL1H
Nov 28, 2023
Author

Thank you for your quick responses and all that huge work in this repository. NO IR problem not solved with 8852bu device but I will go with alfa axml device, I close this topic as resolved.

0 replies

morrownr · 2023-11-28T20:32:50Z

morrownr
Nov 28, 2023
Maintainer

Rokland has a sale on the AXML currently:

https://store.rokland.com/pages/weekenddeals-sale

0 replies

MEL1H · 2023-11-28T20:37:37Z

MEL1H
Nov 28, 2023
Author

I bought it from amazon.nl 52€ 😅

0 replies

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8852bu AP all 5GHZ NO IR #339

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