2021-04-15
Disclaimer: The authors and contributors to this site cannot be responsible for the results of your use of the information contained in or linked from this site. We attempt to provide accurate information but many factors can contribute to less than expected results. You are responsible for ensuring the accuracy and applicability of any information you use to make a decision.
Foreword: There are many USB WiFi adapters that work without the need to install a driver in Linux. These adapters use drivers that are already in the kernel and are maintained in the kernel. The term in-kernel is used in this document when referring to drivers that are already in the kernel. With adapters that use in-kernel drivers, simply plug the adapter in and it will work. Some might call this plug and play. Many people find using adapters with in-kernel drivers to be better than buying an adapter that requires drivers to be found, downloaded, compiled and installed.
USB WiFi adapters provide flexibility as they are easily moved from one location to another and from one computer to another and can even be taken on the road. They come in models for USB 2 and USB 3. Some of the larger adapters work well for desktop use and the smaller adapters, including "nano" adapters, work well for laptops and travel. It is important that you pick an adapter to match the expected usage. If you are going to be traveling with the adapter, the adapters with long antennas may not not work well as the adapter may be broken. On the other hand, if you need an adapter for a desktop system that is on the other end of the house from your AP/Router, you probably need the better signal capability of the larger antennas. Researching the issue is a good idea.
Linux enjoys very good in-kernel hardware support in many areas but support is somewhat limited when it comes to USB WiFi adapters. The main reason for the limited support is that there are only 2 companies supplying chipsets for USB Wifi adapters - Mediatek and Realtek. Intel is not supplying USB capable chipsets and Atheros is not supplying modern USB capable chipsets. Of the two suppliers that do provide USB Wifi chipsets, Mediatek supports drivers for their chipsets the right way, in-kernel. Mediatek drivers are Linux Wireless standards compliant and are updated constantly without users having to worry about it. Realtek does not support their modern USB Wifi chipsets with in-kernel drivers. Realtek does make Linux drivers but does not publically release them or take problem reports. We have to search for them from some adapter vendors that may post them. These drivers are released in source code format and must be compiled to be used. The Realtek drivers do not keep up with the needed changes as new kernels are released. This job seems to rest with folks like myself in the community. Am I a fan of how the Realtek USB team supports the Linux community? No. What do I recommend? Buy adapters based on chipsets from the company that is doing it right - Mediatek. The biggest problem most Linux users have when looking to purchase a USB WiFi adapter is being able to reliably identify which adapters have in-kernel support and that is really the reason for this site. Spreading this information far and wide is key to having happy Linux users so please do spread this information.
This document attempts to identify currently available adapters that use in-kernel driver support. Links are provided to online products. Information regarding out-of-kernel drivers and their quality is also provided. The hope is that this information is of benefit to Linux users, experienced and new. Links to products from a wide variety of retailers are provided and we welcome you to send additional links that can be included. The chipsets are shown in each category and if you are able to find an adapter with the listed chipset, even if it is not an adapter that is specifically listed, it should work.
Linux Wireless - Mediatek is a good place to get an idea of the various Mediatek chipsets that are supported in the Linux kernel. If you want to look in the kernel to see the drivers, look here.
Warning: It is common for online retailers to post "Linux support." It is best to ignore "Linux support" in online ads as this statement is often misleading at best and false at worst. Most inexperienced users do not understand that the Linux kernel is under constant development which makes it necessary for out-of-kernel drivers to be regularly updated in order to work on newer kernels. Rule of thumb: Never attempt to install a Linux driver from a CD. The driver will be old and will likely do nothing more than make a mess of your system. Another rule of thumb: Don't take hardware advice from Windows and MAC users. All major Linux distributions have active forums with users ready to give advice. Don't take advice from a single user but seek advice from several users and always ask if the adapter uses in-kernel drivers.
Warning: Beware of "multi-state" USB WiFi adapters. Some USB WiFi adapters have proprietary Windows drivers onboard. When plugged in, they act like a flash drive or CDROM and on Windows will attempt to start installing the Windows driver. That won't work on Linux or MAC or any other non-Windows OS so the adapter sits there in flash drive or CDROM mode. The problem is that the state of the adapter has to be changed for the adapter to show up as the device that you expect, in this case, a WiFi adapter. Most modern Linux distributions ship with a utility called "usb-modeswitch" that will handle this issue for you if it has the correct information for your adapter. It is a good utility but if you buy adapters that are "multi-state," that is one more potential headache you may have to deal with when something goes wrong. Often you can indentify adapters that are "multi-state" as they are advertised as "free driver" or "free installation driver." If you are looking to buy a USB WiFi adapter for use on Linux, MAC OS, *NIX or anything besides Windows, it is a good idea to seek out single-state adapters.
Note: I will not list any products made by TP-Link and D-Link. Both companies regularly change chipsets while keeping the same model number on their products. This makes it very difficult for Linux users to buy a product with a specific chipset with any degree of certainty. Their Linux support is very poor as their product support sites generally only contain very old Linux drivers that won't work with modern distros... if they post any drivers at all. We know that Linux cannot be properly supported like that. This is sad because both companies have made a lot of money from Linux by using it inside many of their products, yet they do not return the support. My recommendation is to avoid TP-Link and D-Link products.
Note: Adapters by two companies need to be highlighted. Every single USB adapter that Panda makes is supported by Linux in-kernel drivers. The quality and reliability of most Panda and Alfa adapters is good... really good. Not all Alfa adapters use in-kernel drivers. Most of the Alfa adapters that do use in-kernel drivers are listed below. Products by both companies are widely available.
Important: Price and availability of listed adapters is subject to change. Updating the list of adapters does take a considerable amount of time. I try to complete a review of the links at least every 2 weeks. This site has increased in popularity to the point that readers of this site may cause inventory problems for some sellers at times so you may need to wait for inventory to be refreshed. To help with this problem, I have listed multiple links from multiple sellers for some products. If you see any problems, please post in Issues.
Please advise if you see an adapter with this chipset. It is a newer chipset than the mt7612u and the driver is in the kernel and ready but I have yet to see any adapters on the market. Help me watch for adapters with this chipset.
chipset - Mediatek mt7612u - supported in-kernel since Linux kernel 4.19 - tests confirm good support for WPA3
Note: For additional information regarding the mt7612u chipset, please see - https://github.com/morrownr/7612u
Rokland - $35 USD - ALFA AWUS036ACM 802.11ac Dual Band 2.4/5 GHz WiFi USB Adapter "single-state" - Info: Rokland advertises free shipping and no tax outside of Florida.
ebay - $35 USD - Alfa AWUS036ACM 802.11ac 867 Mbps Long Range WiFi USB Adapter "single-state"
Amazon - $37 USD - Alfa AWUS036ACM Long-Range Dual-Band AC1200 USB 3.0 Wi-Fi Adapter [1] "single-state"
Google Shopping - $35-$41 USD - ALFA AWUS036ACM Dual-Band Network Adapter "single-state"
Amazon - $40 USD - Alfa AWUS036ACM Long-Range Dual-Band AC1200 Wireless USB 3.0 Wi-Fi Adapter "single-state"
Note: The above 5 links are for the Alfa AWUS036ACM adapter. This is an excellent product. It is mid-priced, well made and works well in managed mode, master mode and monitor mode. This is a single-state adapter meaning that usb-modeswitch is not required. WPA3 works. Supports interface combinations - #{ managed } <= 1, #{ P2P-device } <= 1, #{ P2P-client, P2P-GO } <= 1, total <= 3, #channels <= 2 and #{ managed } <= 1, #{ AP } <= 1, #{ P2P-client } <= 1, #{ P2P-device } <= 1, total <= 4, #channels <= 1 Device ID - ID 0e8d:7612 MediaTek Inc. Works so well with the Raspberry Pi 4B, 3B+ and 3B, it is almost like it was designed specifically for that hardware. Highly recommended.
ebay - $27 USD - NETGEAR AC1200 USB 3.0 Wi-Fi Adapter - A6210-10000S "single-state"
Amazon - $32-$74 USD - NETGEAR AC1200 Wi-Fi USB Adapter High Gain Dual Band USB 3.0 (A6210) "single-state"
Note: The above 2 links are for the Netgear A6210. It is a more compact adapter that would travel better than the larger dual antenna devices. If you own one, we would appreciate a product review.
Amazon - $16 USD - TEROW ROW02FD AC1200 USB 3 WiFi Adapter 5G/2.4G 802.11 AC [1] "multi-state"
Amazon - $14 USD - TEROW ROW02FD USB WiFi Adapter 1200M USB 3.0 5DBI Wireless Network Adapter "multi-state"
Note: The above 2 links are for the TEROW ROW02FD. It is a multi-state adapter so it does require usb-modeswitch. 2021-04-04 - The Raspberry Pi OS, Kali and the current stable version of Debian, as of this date, need a couple of files edited in order for this adapter to work automatically. For more information, see the following section below - How to Modeswitch. To clarify: Most Linux users will never know that this adapter is multi-state because the usb-modeswitch utility is installed and active on almost all modern Linux distros so the above adapter will "just work." The only modern Linux distros that I am aware of that have this problem with this spectifc adapter are the Raspberry Pi OS, Kali and Debian stable and that is due to some parts of the OS being somewhat dated at this point. As the OS is updated this problem will go away. The cost of this adapter is very low. The performance and quality of the materials used in this adapter are not as good as the Alfa AWUS036ACM but that is to be expected since the Alfa AWUS036ACM is a more expensive adapter.
ebay - $17 USD - Generic: 1200Mbps Long Range AC1200 Dual Band 5GHz Wireless USB 3.0 WiFi Adapter "likely multi-state"
Comfast - $28 USD - COMFAST CF-WU782AC 5.8GHz USB 3.0 WiFi 1300Mbps 802.11ac Long Distance Adapter "multi-state"
Note: The above link is for the COMFAST CF-WU782AC. It is a multi-state adapter so it does require usb-modeswitch. 2021-03-15 - The Raspberry Pi OS, as of this date, needs a couple of files edited in order for this adapter to work automatically. For more information, see the following section below - How to Modeswitch. To clarify: Most Linux users will never know that this adapter is multi-state because the usb-modeswitch utility is installed and active on almost all modern Linux distros so the above adapter will "just work." The only modern Linux distros that I am aware of that have this problem with this spectifc adapter are the Raspberry Pi OS, Kali and Debian stable and that is due to some parts of the OS being somewhat dated at this point. As the OS is updated this problem will go away.
Amazon - $25 USD - COMFAST WiFi Dongle CF-926AC 1200Mbps Wireless USB WiFi Adapter "likely multi-state"
AliExpress - $26 USD - COMFAST usb wifi Adapter 1200m 2.4g 5g dual-band long distance usb wi-fi receiver 7612U chip "likely multi-state"
Note: Indications are that all adapters below this line are "single-state"
Rokland - $40 USD - ALFA AWUS036ACHM 802.11ac Dual Band High Power Mediatek MT7610U WiFi USB Adapter [1] "single-state"
Amazon - $50 USD - Alfa AWUS036ACHM 802.11ac WiFi Range Boost USB Adapter "single-state"
Varia - $36 EUR - Alfa - AWUS036ACHM - 802.11ac WiFi Range Boost USB Adapter "single-state"
Note: The above 3 links are for the Alfa AWUS036ACHM adapter. It is a good product. It is mid-priced, well made and works well in managed mode, master mode and monitor mode. This is a single-state adapter meaning that usb-modeswitch is not required. WPA3 works. Supports interface combinations - #{ IBSS } <= 1, #{ managed, AP, mesh point } <= 2, total <= 2, #channels <= 1, STA/AP BI must match Device ID - ID 0e8d:7610 MediaTek Inc. WiFi Recommended.
Amazon - $8 USD - Cable Matters AC600 Dual-Band USB Wireless Adapter (Wireless AC Adapter, WiFi Adapter)
ebay - $15 USD - Mediatek MT7610U 11AC 600Mbps USB 2.0 Wireless Adapter Dual Band White
SmartGuys - $20 USD - Mediatek 11AC USB Wireless Adapter, MT7610U
ebay - $20 USD - Panda Pau0a AC600 Dual Band Wireless USB Adapter
Amazon - $28 USD - ASUS USB-AC51 AC600 Dual-Band Wifi Wireless Adapter
Amazon - $36 USD - Asus Dualband Wirel. AC600 USB, USB-AC51
Amazon - $30 USD - ZyXEL NWD6505 IEEE 802.11ac - Wi-Fi Adapter
Amazon - $31 USD - Linksys AE6000 Wireless Mini USB Adapter
Amazon - $13 - Mini Dual Band - 2.4ghz 150M - 5ghz 11AC 433M USB Wifi Adapter
Note: The drivers for all of the below adapters have been in the Linux kernel for a long time so even very old distros likely support these adapters.
Amazon - $40 USD -Panda Wireless PAU09 N600 Dual Band (2.4GHz and 5GHz) Wireless N USB Adapter
Amazon - $25 USD - Panda N600 Dual Band (2.4GHz & 5.0GHz) Wireless N USB Adapter
ebay - $22 USD - Kali Linux compatible dual band WiFi sniffer & Packet injection based on RT5572
Note: The above adapter says "Kali Linux compatible" which seems to imply it only works with Kali but that is not the case. This adapter should work with any mainstream Linux distro that is currently supported by its maker.
Amazon - $13 USD - Socobeta RT5572 USB Dual-Band 5.8G/2.4G AC Wireless Network WiFi Adapter
Note: Keeping an inexpensive single band adapter that is supported by in-kernel drivers in your toolkit can save a lot of trouble as it will allow you to have a temporary connection during installation of your Linux distribution. It can also provide temporary internet access in case you have problems with a wired connection or you need to install the driver for an adapter that requires an out-of-kernel driver. I have a couple of single band adapters. One I keep at home and the other goes on the road with my laptop. These adapters are handy.
Panda Wireless PAU06 300Mbps Wireless N USB Adapter
Panda Wireless PAU05 300Mbps Wireless N USB Adapter
ASHATA Wireless USB Adapter RT5372 N300
Wendry Wireless USB Adapter, 2.4GHz, DWA-140, RT5372 N300
Note: Several of the below adapters say "Raspberry Pi" which seems to imply they only works with the Raspberry Pi OS but that is not the case. These adapters will work with any mainstream Linux distro that is currently supported by its maker. Another point to make is while N150 adapters are not the latest toy available, they are still very capable, very solid and will certainly allow users to watch youtube videos, listen to online music and support heavy web surfing without slowdown. Some are cheap enough to justify keeping one around as a backup if for no other reason. My wife's computer uses an adapter with a ar9271 chipset. It just works. In case you are wondering, she uses Linux Mint 20.
DM-Digital USB WiFi Dongle 2dBi MT7601
Zibo Mini USB Wifi Wireless Adapter, 150Mbps
EDUP USB WiFi Adapter for PC - High Gain 6dBi Antenna
Panda Mid Range 150Mbps Wireless N USB Adapter w/ 2dBi Antenna
CanaKit Raspberry Pi WiFi Wireless Adapter
Panda Ultra WiFi (b/g/n) 150Mbps Wireless-N 2.4GHz USB Adapter [1]
Raspberry Pi Pi 2 Pi 3 USB Wireless Adapter Mideatek RT5370N With 2 dBi Antenna 802.11 n g b USB 2.0
USB WiFi Adapter Ralink RT5370
EASTECH Ralink RT5370 Raspberry PI WiFi Adapter
Wireless WiFi USB Dongle Stick Adapter RT5370 150Mbps
ALFA AWUS036NHA Atheros AR9271 802.11n WIRELESS-N USB Wi-Fi adapter
AR9271 802.11n 150Mbps Wireless USB WiFi Adapter
ALFA AWUS036NHA 802.11n Wireless-N Wi-Fi USB Adapter High Speed Atheros AR9271
Quickbuying New Atheros AR9271 150Mbps Wireless USB LAN Adapter
Alfa AWUS036NHA - Wireless B/G/N USB Adaptor
Panda Mini WiFi (b/g/n) 150Mbps Wireless-N 2.4GHz USB Adapter
Deal4GO RT3070 802.11n 150Mbps Wireless USB WiFi Adapter for Kali Linux Ubuntu
INTELLINET IEEE 802.11b/g/n Wireless 150N High-Power USB Adapter
coolxan USB Rt3070 Chipset 802.11n 150m WiFi Wireless-n Adapter
ALFA AWUS036NEH Long Range WIRELESS 802.11b/g/n Wi-Fi USB Adapter
How to Modeswitch
Note: this document was tested on a Raspberry Pi 4b with the current version of the Raspberry Pi OS.
Note: To clarify, almost all recent distros such as Ubuntu 20.04 and later, Linux Mint 20 and later and the current version Manjaro do not require you to do anything. usb-modeswitch is installed and set up and works automatically on the previously mentioned and most modern distros.
Note: As of the date of this document, I am aware of 3 operating systems that require the changes as outlined below:
- Raspberry Pi OS
- Kali Linux
- Debian stable
2021-04-04
TEROW_ROW02FD USB WiFi adapter
COMFAST CF-WU782AC USB WiFi adapter
The above adapters are "multi-state" adapters in that they will initially show up as a CDROM or flash drive. If you run Windows, they will to try to install a driver. In any OS besides Windows, they will remain as a CDROM or flash drive and no driver will be installed. For the WiFi adapter to show up, the adapter has to be told to switch state.
Most mainsteam distros of Linux include a utility call 'usb-modeswitch". It will execute the switch for you if it has the information about your adapter in its data files. If it is not installed or the data for your adapter is not in its data files then:
Ensure usb-modeswitch is installed
$ sudo apt install usb-modeswitch usb-modeswitch-data
Execute usb-modeswitch in a terminal to see if it works
$ sudo usb_modeswitch -K -W -v 0e8d -p 2870
If successful, set it up to run automatically
edit the following file
$ sudo nano /lib/udev/rules.d/40-usb_modeswitch.rules
below the following line
SUBSYSTEM!="usb", ACTION!="add",, GOTO="modeswitch_rules_end"
add two lines
# COMFAST CF-WU782AC WiFi Dongle, TEROW ROW02FD WiFi Dongle
ATTR{idVendor}=="0e8d", ATTR{idProduct}=="2870", RUN+="usb_modeswitch '/%k'"
create the file /usr/share/usb_modeswitch/0e8d:2870
$ sudo nano /usr/share/usb_modeswitch/0e8d:2870
put the following inside:
# COMFAST CF-WU782AC WiFi Dongle, TEROW ROW02FD WiFi Dongle
TargetVendor=0x0e8d
TargetProductList="7612"
StandardEject=1
save the file and reboot
Note: The list is not ranked in order by any specfic measure of performance. Performance and reliability varies. The best overall driver is the 8812au. It performs reasonably well in managed mode, master mode and monitor mode. The 8821au driver is solid in managed mode and master mode. The fastest driver in managed mode is the 88x2bu. My advice, if you need good performance in master mode or monitor mode, is sell your Realtek chipset based adapter and get one of the adapters based on in-kernel drivers as shown earlier in this document. None of these out-of-kernel drivers are fully Linux Wireless standards compliant.
Note: Out-of-kernel drivers require you to find, download, compile and install the driver source code. The below links provide a lot of information, including information about supported adapters. Nine total chipsets are supported with the following five drivers.
Note: None of the Realtek out-of-kernel drivers test good for WPA3 support. If you need WPA3 support, head back up to the list of adapters with in-kernel support. I have tested multiple adapters with mt7612u chipsets and WPA3 is working fine with Ubuntu 20.04 and later, Linux Mint 20.1 and the Raspberry PI OS.
Note: None of the Realtek out-of-kernel drivers support interface combinations. If you need support for interface combinations, head back up to the list of adapters with in-kernel support. I have tested multiple adapters with mt7612u and mt7610u chipsets and multiple interface combinations are supported with the current Linux in-kernel drivers.
Recent changes:
- 2012-03-23 - changes to the above paragraphs and various changes below.
Linux Driver for USB WiFi Adapters that use the RTL8812BU and RTL8822BU Chipsets
The rtl8812bu chipset may see future in-kernel driver support based on the work being done on the rtw88 in-kernel driver. This chipset tends to run cool, which is good, and Realtek currently provides updated out-of-kernel driver source code on a semi-regular basis. Adapters based on this chipset are readily available at low prices but beware of poor quality adapters made by some adapter makers. Read the reviews before buying. The driver in the above link works very well with this chipset.
The Good:
- fast in managed (client) mode (for an AC1200 chipset)
- runs cool
- possible in-kernel driver support at some point
- readily available at low prices
- power saving works well
The Bad:
- WPA3 does not work
- no support for interface combinations
- the really bad quality of some adapters made with this chipset means you need to reseach before buying
- not a good choice for master mode or monitor mode (with the current out-of-kernel driver)
Linux Driver for USB WiFi Adapters that use the RTL8811CU, RTL8821CU and RTL8831AU Chipsets
The rtl8811cu chipset may see future in-kernel driver support based on the work being done on the rtw88 in-kernel driver. This chipset tends to run cool, which is good, and Realtek currently provides updated out-of-kernel driver source code on a regular basis. Adapters based on this chipset are readily available at low prices but beware of poor quality adapters made by some adapter makers. Read the reviews before buying. The driver in the above link works very well with this chipset.
The Good:
- fast enough for most users
- runs cool
- possible in-kernel driver support at some point
- readily available at low prices
- power saving works well
The Bad:
- WPA3 does not work
- no support for interface combinations
- the really bad quality of some adapters made with this chipset means you need to reseach before buying
- not a good choice for master mode or monitor mode (with the current out-of-kernel driver)
Linux Driver for USB WiFi Adapters that use the RTL8812AU Chipset
The rtl8812au chipset is an aging chipset that will likely never be supported by an in-kernel driver which leaves users dependent on Realtek to release future out-of-kernel source code. This makes buying adapters based on this chipset somewhat risky for Linux users. The market for USB WiFi adapters has seen a switch over the last few years from this chipset to the rtl8812bu chipset for adapters in the AC1200 class. Not many rtl8812au adapters remain available on the market. The above driver is a really good quality driver but the question is, how long will Realtek continue to release out-of-kernel source code for this chipset.
The Good:
- best out-of-kernel driver of the 5 listed here, very solid
- master (AP) mode is outstanding
- monitor mode is reported to be pretty good, even on 5g
- power saving works well
The Bad:
- WPA3 does not work
- no support for interface combinations
- future Realtek support unknown
- will likely never be supported by an in-kernel driver
- limited availability, has mostly been replaced by rtl8812bu
Linux Driver for USB WiFi Adapters that use the RTL8811AU and RTL8821AU Chipsets
The rtl8811au chipset, like the rtl8812au chipset, is an aging chipset that will likely never be supported by an in-kernel driver which leaves users dependent on Realtek to release future out-of-kernel source code. This makes buying adapters based on this chipset somewhat risky for Linux users. The market for USB WiFi adapters has seen a switch over the last few years from this chipset to the rtl8811cu chipset for adapters in the AC600 class. Adapters that use the rtl8811au chipset are still available but availability is declining. The above driver is a decent quality driver but is somewhat dated and is hard to maintain much like the driver for the rtl8814au. The question is, how long will Realtek continue to release out-of-kernel source code for this chipset.
The Good:
- master (AP) mode is excellent
- power saving works well
The Bad:
- WPA3 does not work
- no support for interface combinations
- future Realtek support unknown
- will likely never be supported by an in-kernel driver
- limited availability, has mostly been replaced by rtl8811cu
Recommendation: Do not buy adapters based on this chipset. Better options are available. You will likely be happier in the long run with an adapter that uses either the mt7612u or mt7610u chipsets.
Linux Driver for USB WiFi Adapters that use the RTL8814AU Chipset
The rtl8814au chipset is an aging chipset that will likely never be supported by an in-kernel driver which leaves users dependent on Realtek to release future out-of-kernel source code. This makes buying adapters based on this chipset somewhat risky for Linux users. Adapters based on this chipset can really push data at high speed and are still available but are relatively expensive. They need a pretty good amount of current so use with a powered USB 3 hub may be a good idea. This chipset builds a lot of heat so look for adapters that have plenty of vent holes and search reviews to see if users are reporting heat problems. The above driver is a reasonaly good quality driver but the source is from 2019. We need Realtek to release an updated version of the driver source code as the code for this driver (2019) is showing some age. Will Realtek release a new version? I don't know.
The Good:
- fastest USB chipset available
The Bad:
- WPA3 does not work
- no support for interface combinations
- future Realtek support unknown
- not a good choice for master mode or monitor mode (with the current out-of-kernel driver)
- uses a lot of current so using a powered hub may be a good idea depending on your setup
- produces a lot of heat, adapter needs a lot of vent holes
- expensive
Recommendation: Do not buy adapters based on this chipset. You will be disappointed. Better options are available. You will likely be happier in the long run with an adapter that uses either the mt7612u or mt7610u chipsets.
Adapter Reviews:
2021-03-03
AC1200+ USB 3 WiFi Adapter Comparison
Adapter Chipset USB Capability
MaxPower Device ID Visible Antennas
iperf3 Test Link Quality Signal Level
Alfa AWUS036ACH rtl8812au USB3
800mA ID 0bda:8812 2
309 Mb/s Link Quality=99/100 Signal level=-43 dBm
Cudy WU1400 rtl8812bu USB3
504mA ID 0bda:b812 1
291 Mb/s Link Quality=84/100 Signal level=-51 dBm
Alfa AWUS036ACM mt7612u USB3
400mA ID 0e8d:7612 2
237 Mb/s Link Quality=79/100 Signal level=-55 dBm
Generic (brown box) rtl8812bu USB3
504mA ID 0bda:b812 2
216 Mb/s Link Quality=70/100 Signal level=-61 dBm
Generic (brown box) rtl8814au USB3
864mA ID 0bda:8813 2
204 Mb/s Link Quality=86/100 Signal level=-50 dBm
Test conditions:
Distance from adapters to AP was about 45 feet (2 walls).
iperf3 server is running on a Raspberry Pi 4b that is connected to the network via CAT 6 ethernet cable.
Adapters were connected to a rear USB 3 port on a Dell Optiplex 9020 with an i7 processor running Linux Mint 20.1.
Utilities used include wavemon, iw and iperf3.
iperf3 test: $ iperf3 -c 192.168.1.40 -t 120
Analysis:
This is a limited test based on a user request. I'll plan on expanding the test as time permits.
If I have to declare an overall winner from the tested adapters, it would be this adapter:
Alfa AWUS036ACM
The reason for picking the above adapter is that it did a good job in all categories. Some adapters may beat it in some categories but this is the only adapter that performed well in all catagories. It was solid in managed mode, master mode and monitor mode. The only tested adapter that came close is the Alfa AWUS036ACH (rtl8812au chipset) but it used close to 800 mA when pushed hard which is about twice the amount of current used by the Alfa AWUS036ACM (mt7612u chipset). This low current usage by the Alfa AWUS036ACM is very good for use with Raspberry Pi hardware or any other use where low power useage and cool operating temps are needed. The Alfa AWUS036ACM can be plugged directly into a RasPi 4b USB 3 port and there is plenty capacity left over for other things. I have a USB 3 500gb SSD and a Alfa AWUS036ACM plugged into my RasPi 4b and it is very stable. I couldn't do this with most other AC1200 class adapters as they pull too much current. The RasPi 4b USB subsystem is limited to 1200 mA.
Here are the categories.
If price is important:
Cudy WU1400 (low price)
Alfa AWUS036ACM (mid price)
Alfa AWUS036ACH (very high price)
If quality construction is important:
Alfa AWUS036ACM
Alfa AWUS036ACH
Cudy WU1400
If a strong signal is important:
Alfa AWUS036ACH (astoundingly good)
Cudy WU1400 (very good)
Alfa AWUS036ACM (very good)
If an in-kernel driver is important:
Alfa AWUS036ACM (it is a very good driver)
If master (AP) mode is important:
Alfa AWUS036ACM
Alfa AWUS036ACH
If fast managed (client) mode is important:
Cudy WU1400
Alfa AWUS036ACH
Alfa AWUS036ACM
If monitor mode is important:
Alfa AWUS036ACM
Alfa AWUS036ACH
If low power usage is important, such as if you are going to use it with a Raspberry Pi 4b:
Alfa AWUS036ACM
Cudy WU1400
If not having to worry about future driver support is important:
Alfa AWUS036ACM
Cudy WU1400 (maybe)
If having the the device driver support current Linux Wireless standards is important:
Alfa AWUS036ACM
If having a clear path to report driver problems is important:
Alfa AWUS036ACM
Link to MT76 driver in the Linux kernel: (mt7663u, mt7612u and mt7610u chipsets)
https://github.com/torvalds/linux/tree/master/drivers/net/wireless/mediatek/mt76
Link to RTW88 driver in the Linux kernel: (possible future 8812bu chipset support)
https://github.com/torvalds/linux/tree/master/drivers/net/wireless/realtek/rtw88
Note: This driver does not support usb adapters yet but there is hope.
Link to RTL8812AU driver in the Linux kernel:
It does not exist and likely will never exist. My opinion is that we will never see a fully Linux Wireless standards compliant driver for the rtl8812au chipset. The same is true for the 8811au and 8814au chipsets.
Hopefully this document is of help to Linux users that want or need USB WiFi adapter support. I will look to expand and improve this document in the future.
The mission of this site is to collect information and provide links regarding the purchase and use of USB WiFi adapters with Linux.
Any information and links you can provide are welcome. Submit the information and links by clicking on Issues...or if you are a Github user, submit a Pull Request.
Regards,
morrownr
[1] I have and use this adapter
[2] I have an adapter that uses this chipset