On OpenWrt 6.6.43 WNC7850 is no more crashing due to Janusz's finding.
However AP is not working for WCN7850
I will continue on BPI-Router 6.11-rc1
On both OS same issue....
Just wondering if it could be related to such an issue:
[ 24.717933] ath12k_pci 0001:01:00.0: No reg rules available >>>>>>> ????
[ 24.723562] ath12k_pci 0001:01:00.0: failed to extract regulatory info from received event
root@BPI-R4:/nvme/work/oled# iw reg get
global
country PL: DFS-ETSI
(2400 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
(5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
(5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
(5725 - 5875 @ 80), (N/A, 13), (N/A)
(5945 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR
(57000 - 66000 @ 2160), (N/A, 40), (N/A)
phy#2 (self-managed) >>>> WCN7850
country na: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 20), (N/A, 20), (N/A), PASSIVE-SCAN
(5170 - 5330 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5490 - 5730 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5735 - 5895 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5945 - 7125 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5945 - 7125 @ 320), (N/A, 30), (N/A), AUTO-BW, PASSIVE-SCAN
Hostapd is hanging on:
interface state UNINITIALIZED->COUNTRY_UPDATE
Regarding this:
There seems to be a new board-2.bin at:
Since ath12k has been added to OpenWRT snapshots today - I gave it a try 
However, the firmware seem to be missing ?
I added that myself and also had to add a wireless configuration for my WCN7850 - after that it seems to be up and running.
The "iw list" on this card is impressive
But it does not seem to work really yet - I can setup an AP but I cant see it from other clients/computers.
i could make wcn7850 works in single band (2G/5G/6G). But failed to enable dual band.
valid interface combinations:
* #{ managed } <= 1, #{ AP, P2P-client, P2P-GO } <= 16, #{ P2P-device } <= 1,
total <= 16, #channels <= 1, STA/AP BI must match, radar detect widths: { 20 MHz (no HT), 20 MHz, 40 MHz, 80 MHz }
Is it capable to do it? Looks like yes.
quite explicit, isn't it?
Thank you for your reply. Not familiar with these parameters. I read AP <=16 and thought it could support dual band.
Do you know if WCN875x is capable to do dual band or not? Is this ath12k driver limitation or hardware limitation?
Is there any wifi-7 card supports dual band or tri band usage? For my use case, I need dual band (at least) AP mode.
The Banana pi BPI-R4 with its Wifi7 card is your best choice since its an affordable triband wifi7 solution thats works in OpenWRT
Triband cards from Qualcomm are large and expensive - probably too large to fit where you are planning to use it.
Wallys/DR9074-Triband QCN9024 2.4G-5G-6GHz-4T4R
(and this is not even wifi7 - its 6E)
I have found a new wifi7 dual band card from Compex which is smaller and affordable, but it is only 2.4GHz and 5GHz and I dont know if it is supported by OpenWRT yet.
Dual-Band Concurrent 2.4+5GHz WiFi 7
Other than that, the dual-band Wifi 6E from AsiaRF might be something ?
Wi-Fi 6E AX3000 M.2 AE Key Module AW7916-AED
But remember that these solutions are large and might not fit everywhere - this is a picture I have taken:
AsiaRF also seems to have a new Wifi7 card for the M.2 AE slot, but its also large and I know nothing more of this.
Im back to the WNC7851 cards and wifi7 
It seems a bit strange behaviour... I have 2 cards and if they are both inserted I have problems with one:
root@BPI-R4:~# lspci
0000:00:00.0 PCI bridge: MEDIATEK Corp. Device 7988 (rev 01)
0000:01:00.0 Network controller: Qualcomm Technologies, Inc WCN785x Wi-Fi 7(802.11be) 320MHz 2x2 [FastConnect 7800] (rev 01)
0001:00:00.0 PCI bridge: MEDIATEK Corp. Device 7988 (rev 01)
0001:01:00.0 Network controller: Qualcomm Technologies, Inc WCN785x Wi-Fi 7(802.11be) 320MHz 2x2 [FastConnect 7800] (rev 01)
as firmware is not loaded to 2nd card...
===============================================
AP is working on BE mode only with max 160Mhz but it is not seen by BE200 card 
good luck with qualcomm ...
2 WCN7851 cards on the same host...
As I see this is a long story with ath1x drivers...
Probably workaround is here
I didnt decide to go with BE14 NIC and I took WCN7851 card instead.
Diversity is good
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the only option is original module be14 or be19 - other is pointless.
For me, BE14 is totally experimental 
It is only good in power consumption and heat generation
I wish you all the best and fun with BE1x NIC
For me works very good in two devices, i see no flaws in it.
Hello OpenWrt-Community,
I've been extensively researching suitable hardware for an OpenWRT-powered WiFi router to serve as the backbone of my home cloud setup, specifically requiring a stable connection to my NAS via 10Gbps. My current client devices do not support WiFi7, which is why WiFi6E is my primary focus for now. However, the possibility of upgrading to WiFi7 in the future without needing a completely new device is appealing. After considering options like the Xiaomi AX9000, I found myself drawn to the Banana Pi R4 (BPi-R4) due to its promising hardware specifications. However, I've come across mixed reviews regarding its stability, particularly with WiFi7 configurations utilizing the NIC-BE14 expansion card.
Key Requirements for My Setup:
- WiFi6E Support: Triband capability with the 6GHz frequency band is a must.
- MIMO Configuration: Preferably 3×3 for enhanced performance.
- Stability with OpenWRT: The primary concern, given the mixed reports on the BPi-R4's stability, especially in relation to WiFi7 and the NIC-BE14 card.
- 10Gbps Connectivity to NAS: Seamless integration with my existing network infrastructure.
- Future-Proofing for WiFi7 Upgrade: Anticipating a potential upgrade path to WiFi7 through future OpenWRT-compatible expansion cards for the BPi-R4, if feasible.
Is the NIC-BE14 suitable for stable WiFi6E operation with OpenWRT on the BPi-R4?
Have any of you successfully deployed a similar setup (BPi-R4 or equivalent) with OpenWRT for a home cloud, achieving stability and meeting the aforementioned requirements?
Are there alternative hardware recommendations that might better fit my needs, considering both current WiFi6E performance and future WiFi7 upgrade potential?
Thank you for sharing your insights, experiences, and recommendations!
I still think that the Banana pi wifi7 card is your best choice - by far actually.
If you really want tri-band with 6GHz you will otherwise probably have to buy the AsiaRF 7916 for a 2.4 and 6GHz dual-band solution and a separate card for 5GHz in the other slot.
Unfortunately I dont think the AsiaRF 7916 is good choice, its expensive (after freight, tax and duty) and is not working properly. (I ended up paying almost the same price as the Banana pi wifi 7 card)
The Banana pi Wifi7 works like a dream in comparison - the reason that there are many reports of problems is that it is a brand new device with many new users at the moment and not all functions are implemented yet.
But Im running it as a 6E (6GHz) access point and its working fine
You can go on alibaba or aliexpress and find there also some other wifi 7 cards but they are not populair, expensive or not working in AP mode.
I was working with MT7916AN too. Dual band was OK (2g+5g), the problem was with heating - idle 50-60C during some speed tests 90C. If you place all cards in the same box it could be problem with cooling, also radiator is needed.
Mediatek NIC BE14 for me hits the same but as in another topic, guys are working on make it working better and better.
Here I decide to work with Qualcomm WCN785x.
In general, support from Mediatek and Qualcomm is rather poor. Look , Banana Pi Bpi-R4 was issued one year ago and after couple of months we were able to work with that board normally but discovering still some issues, some bugs etc.
I made come back to openwrt...
Just reminder... My config: 2x QCNCM865 cards , Dual band on single card is not
working still...
By now BE is not seen - checking config
For those who want to test here is my image
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