That brosTrend looks interesting. I believe I have tried to verify it's WiFi chip in the past but was unable to.
OTOH, I got a Netgear A6210 in the mail today yes! Every time I get a package from amazon It's like Christmas morning and I am 6 all over again. sorry back to reality...
Ok so the Netgear A6210 does work. I got a used one from amazon with a 1.5 foot long USB 3.0 extension cable and docking station that holds the adapter upright so the antenna stays up in the air. Best of all it was less then $15 because it was reconditioned by amazon, I think it was basically a customer returned item they could no longer sell new. I plugged it into my OpenWRT router and here is the terminal info...
Bus 001 Device 003: ID 174c:55aa RSH-339 ASM1153E
Bus 002 Device 001: ID 1d6b:0001 Linux 5.4.143 ohci_hcd Generic Platform OHCI controller
Bus 004 Device 002: ID 0846:9053 NETGEAR A6210
Bus 004 Device 001: ID 1d6b:0003 Linux 5.4.143 xhci-hcd xHCI Host Controller
Bus 001 Device 001: ID 1d6b:0002 Linux 5.4.143 ehci_hcd EHCI Host Controller
Bus 003 Device 001: ID 1d6b:0002 Linux 5.4.143 xhci-hcd xHCI Host Controller
root@AC68U-43B8:~# lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
|__ Port 1: Dev 2, If 0, Class=, Driver=mt76x2u, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/0p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/2p, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/2p, 480M
|__ Port 2: Dev 3, If 0, Class=, Driver=uas, 480M
As anyone can see it is correctly identified and put on the USB 3.0 hub. It also works on the USB 2.0 port if I plug it in there FWIW...
Any ways In order to get it working I had to install a few packages, namely:
opkg update && opkg install iw-full hostapd kmod-mt76x2u wpa-supplicant
There might of been another mediatek driver package I forgot. Ill play around with it and finalize that opkg list later.
Some info about the A6210 adapter, it has a max 18dBm in ABGNAC mode, it is not dual concurrent, so you can have EITHER 2.4Ghz on OR 5GHZ but not both. I am able to use channels 1-13 and 36-165 btw all the DFS channels are also available. IT also DOES work in Access Point mode! This is important because there are a lot of WiFi adapters that work with OpenWRT in STA Client mode, but a relatively few who work in Access Point mode. And a very few adapters who do 802.11AC AND Access point mode!
Bandwidth: the A6210 adapter has about 300mbps using iperf3 when connected to my laptop which has a 2x2 AC adapter. that's a little less bandwidth then say, if I were to run the same test when connected to a wireless router or dedicated access point. in that instance I may expect 300-350mbps with iperf3. Putting this into perspective, most of you know or should know that WiFi link rates are a SCAM. even the best WiFi equipment can typically maintain only half the link rate as throughput. And its usually more like 1/3 or even 1/4! In other words a 2 stream AC router operating with a link rate of 866mbps can typically at best only hope to achieve maybe 350-400mbps and that's on a good day. So to see this 2 stream network card achieve 300mbps actual with a link rate of 866 without any tweaking or interrupt changes is not bad imo and can only get better. BTW I have the reg domain set to PA if anyone cares. I believe it offers the best combo of unlocked channels no DFS and high transmitter power limit on all channels. Usual disclaimer about using the correct reg domain for your'e area applies...
Tomorrow if I get time I am going to open the plastic housing and put on a pair of screw on antennas I took off my Asus AC68U. The A6210's housing is held together with 2 screws, and the fold out panel antenna is attached to the PCB with u.fl connectors, so it will be very easy to put a set of external high gain antennas on it without breaking anything or even doing any soldering.
More reading about this adapter:
https://github.com/haraldrudell/Linux-WPA3-Personal/issues/1 <--- Very good info although one thing is now incorrect, he claims this adapter is limited to 36, 48, 149 and 165, maybe that was true last year, but I can personally verify that all the 5G channels are unlocked when using OpenWRT 21.02 and the latest drivers.