Edimax WiFi Adapter (EW-7811UN)

The Edimax WiFi Adapter is a nano-sized USB wireless adapter that supports maximum range and speed when connected to your local network. Despite the size, this tiny USB adapter supports a data rate of up to 150Mbps when connected with a wireless 802.11n device. Simply plug it into any USB port and enjoy incredible high-speed wireless network access. This WiFi adapter is even natively supported by the Raspberry Pi, and is probably the most reliable networking tool available for the development platform! This is for sure the trendiest piece of upgrade you can make to your wireless network.

The Edimax WiFi Adapter complies with wireless IEEE802.11b/g/n standards. As being built with the latest wireless technology, this adapter can increase your wireless coverage and greatly help reduce dead spots. The transmission data rate can go up to 150Mbps when connected to a 802.11n device, with signal travel further and connection much more stable compared to your previous 802.11g network.

  • Complies with wireless 802.11b/g/n standards with data rate up to 150Mbps
  • Green Power Saving : supports smart transmit power control and auto-idle state adjustment
  • Increases wireless coverage 3 times further than an 11g adapter
  • Includes multi-language easy setup wizard
  • Supports 64/128-bit WEP, WPA , WPA2 encryption and WPS-compatible
  • Supports QoS-WMM, WMM-Power Save mode

Edimax WiFi Adapter (EW-7811UN) Product Help and Resources

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
See all skill levels


Customer Comments

  • Does anyone know if this work with aircrackng, kismet, and other Wifi Security stuff? Can one do injection, passive mode, etc. on the Rpi, especially?

  • Is anyone able to connect to an N network? I’m only seeing our 2.4ghz ssid, not our 5ghz.

  • I got the Edimax WiFi adapter as part of the Raspberry Pi 2 Starter Kit, so I can’t post this as a review since I didn’t purchase it directly. However, I wanted to share that I tried plugging the adapter into my LEGO Mindstorms EV3 and am happy to report that it works perfectly (EV3 firmware version 1.08H).

  • Does this module work on the 2.4 GHz or 5 GHz band (or both)?

  • For anybody experiencing dropped connections on the Edimax WiFi Adapter

    I found that the root of the problem was not the adapter, but Raspian attempting to save power by shutting off the WiFi adapter when it becomes idle. If you are experiencing dropped connections, open terminal and make a file 8192cu.conf in directory /etc/modprobe.d/ with the command:

    sudo nano /etc/modprobe.d/8192cu.conf

    Then add the following line to the file

    options 8192cu rtw_power_mgnt=0 rtw_enusbss=0

    You should be all set! No more dropped connections!

  • A Probably good idea is to write down it’s information if planning to plug/unplug more then a few times. That text is likely not going to last that long if frequent plugging is involved.

  • I have this running on an RPi2 within a garage with a mediocre signal, replacing an older dongle that was stable(ish) but slow. After swapping in the 7811UN I started to lose packets and the interface itself seems to drop, forcing a reboot (even a networking service restart doesn’t wake it). This could be a disagreement with the Asus RT-N66U WAP, or a missing Raspian tweak, but uptime is only a few hours at a time right now.

    Speed is SIGNIFICANTLY improved however.

    • To follow up - disabled “b/g Protection” on the RT-N66U and things have improved significantly. Been running for an hour now without the 7811UN losing the carrier & the interface shutting down, which is a new record. Packet loss is significantly better as well.

      • I also disabled b/g protection on my Asus RT-AC68P and forced only N on the 2.4Ghz band and have seen better stability with my adapters as well.

  • Here is another by Edimax that they sell also 300mbps http://www.frys.com/product/8467058?site=sr:SEARCH:MAIN_RSLT_PG its $15 I have not tested it though.

  • There is one that Fry’s electronics sells. Its 300mbs and works well with both the PI, and Pi 2. I have tested them both and they work out of the box with the debain. They were priced $12 and I bought 2 of them http://www.frys.com/product/7356814?site=sr:SEARCH:MAIN_RSLT_PG

  • For anyone who’s wondering, the chipset used is the RTL8188 (source)

Customer Reviews

4.4 out of 5

Based on 8 ratings:

Currently viewing all customer reviews.

1 of 1 found this helpful:

Works well with AstroPrint

I bought this to get my Raspberry Pi Zero work as an Astroprint Server on my 3D Printer. Works straight out of the box. I had a Netgear dongle before that does work with Raspian, but for some reason was not properly recognized with the Astroprint distribution. This Edimax Wifi Dongle works just fine.

1 of 1 found this helpful:

Raspberry Pi 2 / Windows 10 IoT

I tried several WiFi dongles on the Raspberry Pi 2 running Windows 10 and this is the only one I got working. It didn’t work out of the box, I had to download a driver from the Edimax website and install it by ssh'ing to the Raspberry Pi and using this awkward command I found after a google search:

devcon.exe install netrtwlanu.inf “USB\VID_7392&PID_7811”

1 of 1 found this helpful:

Impossibly Small but Works Great

It works great with my Raspberry Pi. It was easy to setup from the desktop: Menu > Preferences > WiFi Configuration But “ifplugd” prevented it from starting up properly at boot. “sudo apt-get purge ifplugd” fixed the problem.

4 of 4 found this helpful:

Awesome TINY WiFi Adapter

Works great and has good reception for its size.

Many users complain that this drops connections. I found this to be true, but after some digging I found that the root of the problem was not the adapter, but Raspian attempting to save power by shutting off the WiFi adapter when it becomes idle. If you are experiencing dropped connections, open terminal and make a file 8192cu.conf in directory /etc/modprobe.d/ with the command:

sudo nano /etc/modprobe.d/8192cu.conf

Then add the following line to the file

options 8192cu rtw_power_mgnt=0 rtw_enusbss=0

You should be all set! No more dropped connections!

1 of 1 found this helpful:

Plug and play, it just works.

I have seen it having some trouble staying connected. But it walways manages to reconnect, so that works for me.

0 of 1 found this helpful:

bad experience

i bought that to use with a raspberry pi and make me spent 1 month trouble shooting why cannot receive broadcast message for an ad-hoc wi-fi network using raspberry pi. as soon i changer the module wifi by another brand everything get solved

The Edimax WiFi Adapter EW-7811UN

The EW-7811UN, is a value at the price point it commands. The unit very is easy of use, efficiency and data transfer speed, as well range are noticed in use. This alone, is a step above an average WiFi Adapter. That plus the embedded setup configuration code, makes installation very fast. The features included in the EW-7811UN, require the silicon to include the mask ROM geometries of the configuration code, and related support circuitry; in turn require larger substrate real estate, manufacturing mask’s and die’s. That said, the small increase in cost is well worth the quality of a superior WiFi Adapter.

Raspberry Pi TNC-Pi Project

This WiFi adapter provided a handy and reliable LAN interface for a WinLink Gateway node.