Amazon.com: Customer reviews: Edimax EW-7811Un 150Mbps 11n Wi-Fi USB Adapter, Nano Size Lets You Plug it and Forget it, Ideal for Raspberry Pi / Pi2, Supports Windows, Mac OS, Linux (Black/Gold)
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Customer reviews

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Edimax EW-7811Un 150Mbps 11n Wi-Fi USB Adapter, Nano Size Lets You Plug it and Forget it, Ideal for Raspberry Pi / Pi2, Supports Windows, Mac OS, Linux (Black/Gold)

Edimax EW-7811Un 150Mbps 11n Wi-Fi USB Adapter, Nano Size Lets You Plug it and Forget it, Ideal for Raspberry Pi / Pi2, Supports Windows, Mac OS, Linux (Black/Gold)

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Top positive review

Positive reviews›
Carl Crawford
5.0 out of 5 starsWorks great with Raspberry Pi once I got it configured
Reviewed in the United States on May 29, 2013
I tried for days to get this configured. Here is so much conflicting information out there. Finally I found a script to automatically install it. Here are the instructions:

Installing your rtl8188cus wireless adapter:
--------------------------------------------

If you are installing your first wifi adapter or adding a new wifi adapter to a Pi that
already has a different one installed the driver should be installed BEFORE plugging in the
new wifi adapter.

DO NOT PLUG IN THE WIFI ADAPTER UNTIL ASKED TO - LOOK AT THE SCREEN OUTPUT FOR INSTRUCTIONS.

So connect up your Pi then power on and wait for it to boot and initialise. Log in and then
you can start to install the software/firmware for the wifi adapter.

Some images need configuring when they are first run so go through the configuration before
running the sript. After the image is configured you can start the script to install the wifi.

If you have an internet connection to your Pi you can now download the script. Use the
command:

sudo wget http://dl.dropbox.com/u/80256631/install-rtl8188cus-latest.sh -O /boot/install-rtl8188cus-latest.sh

This will install the script in the /boot directory of the SD card ready to run.

If you are NOT logged in as root start the script using the command:

sudo /boot/install-rtl8188cus-latest.sh

If you are logged in as root use the command:

/boot/install-rtl8188cus-latest.sh (no sudo!)

If you are connected to the Pi using ssh, and not logged in as root user then you may need
to use the command

sudo bash /boot/install-rtl8188cus-latest.sh

or if logged in as the root user.

bash /boot/install-rtl8188cus-latest.sh

The script should now start running. I have written the script so it will output messages to
the screen so you can see what it is doing as a lot of the time there is no output to the
display.

If you have not used the script before it will make an update to the kernel configuration
to allow you to run with the wifi adapter plugged in before the driver is loaded. This
configuration change will disable a built in driver that does not work and causes problems
if the wifi adapter is plugged in before the working driver is installed. After making the
change it will shutdown the Pi. You can then plug in the wifi adapter and power on again
and thePi should run without problems. You can then run the acript to install the wifi
driver and configure the wifi.

At the beginning of the installation the script will make several checks. It will check if
you have an internet connection, wired or wireless, and you have access to the internet. It
will try and determine if you already have a wifi adapter configured.

If you do not have an internet connection to your Pi it will check it has all the necessary
files to install and run the wifi driver. If it does not have all the files it needs it will
output a list of files it does not have and will abort the installation. You will have to
download the files it requires and copy them to the /boot directory of the SD card and
restart the script.

For some images it may be necessary to install some additional applications to allow the
wifi to operate correctly. The script will install these before configuring and installing
the wifi driver. If your Pi doesn't have an internet connection and these files are not
copied to the SD card the script will list the files it needs and then abort. You will need
to download and copy these files to the /boot directory of the image.

To copy missing files to the Pi there are basically two ways to do it. You can shutdown the
Pi, remove the SD card and plug it into the computer used to generate the image in the first
place. Then download the missing files on that computer and copy them to the SD card.

Alternatively you can download the files needed on another computer with internet access and
then copy them to a USB stick. You can then install the USB stick in the Pi and copy them from
the USB stick to the SD card. To copy files to the /boot directory you will need to run the
commands as root user. As I understand it a USB stick would normally be automatically mounted
in the directory /media. The command

ls /media

should then show the device name. You can then copy the files using the command format

sudo cp /media/device-name/filename /boot

I have, however, found that devices are not always mounted automatically so you must first
mount the device manually. Using the command

sudo mount /dev/sda1 /mnt

will mount the device in the /mnt directory rather than /media. The files can then be displayed
with the command

ls /mnt

You can then copy the files using the command format

sudo cp /mnt/filename /boot

When finished copying the necessary files do not forget to unmount the USB stick -

sudo umount /dev/sda1

Once all the files are copied to the SD card restart the script. It will again check all the
files needed are available on the SD card and then start the install.

If you already have a wifi adapter installed it will ask if you want to update the driver or
add a new wifi adapter. If you are using an image that already has the rtl8188cus driver
installed and it no longer works because you have made a software update you can update the
driver to repair the driver installation. If a wifi driver is already installed, either
using a different driver or the rtl8188cus driver, you can add another wifi adapter. You can
then use either adapter or even use both. You can use this option to install a new wifi
adapter if you don't want to use your old adapter, although the Pi will still be configured
to run the older adapter if necessary.

After the driver and any other files needed are installed the script will then configure the
files needed to use the wifi. It will first ask you the type of security the network uses if
any. eg unsecured, WEP or WPA/WPA2. It uses this to determine some of the settings needed
for the installation and whether you need to input a PASSWORD. The script will not ask for a
password if you selected unsecured as the network security.

The script will then ask you to input the network SSID and a PASSWORD if it is required.
Type in the SSID and then the PASSWORD. These values will be copied to the file
/etc/network/interfaces as part of the setup. When inputting the SSID and PASSWORD the
script will ask you to verify that they are correct before using then.

A recent addition to the script is a check to see if the wifi network you want to connect to
is visible by the wifi adapter - that is it is transmitting it's ssid. With the basic setup
used by the script a wifi adapter will not be able to connect to a network that does not
transmit it's ssid. When the script gets to the point where it asks for the ssid of the
network you want to connect to it will check the name is in this list. If it is not it will
let you know. To get a connection you should reconfigure your wireless network to transmit
the ssid.

Once the SSID and PASSWORD have been input and verified OK the remaining files will be
configured to ensure the driver module is automatically loaded whenever the Pi is restarted.

The wifi driver should now be installed and configured. The script will output a message
asking you to plug in the wifi adapter. Plug in the wifi adapter and press any key to
continue.

It will wait for the wifi to connect then output some information about the network
connection. It will show details on the wireless setup and should show you the IP address
assigned to the wireless adapter. You can terminate the installation at this point by
pressing Cntl-C.

If you do not terminate the script it will then continue on and update the software packages
list and upgrade the installed software packages. This can take a long time especially if
you are using any of the older images.

The script will then install rpi-update if it is not already installed. The rpi-update
script, developed by Hexxeh, updates the Pi firmware/software.

The script will now check if the driver that is loaded is the latest available or not. If
the installed driver is the latest the script will terminate and the wifi should be working.

If the driver is not the latest version rpi-update will be run to update the Pi's
firmware/software and then the final stage of the installation is to update the wifi driver
to the latest version.

If rpi-update is run by the script when the script terminates the Pi will reboot. If rpi-
update does not run the script will just terminate and you can continue to use the Pi.

When it has rebooted, login - AND START TO HAVE SOME FUN.

HAVE FUN WITH YOUR RASPBERRY PI.
Read more
5 people found this helpful

Top critical review

Critical reviews›
Oofer
1.0 out of 5 starsWorks but you might need to do some troubleshooting
Reviewed in the United States on September 18, 2013
Right off the bat I'll say that you should prepare yourself to do some troubleshooting, which might include moving your device closer to the wireless signal.

It's very small, doesn't seem all the fragile as some have mentioned (I ended up removing it from USB slots and re-inserting it a bunch of times in a short time span with no apparent loss of fidelity), and the driver installed just fine. For the first couple of hours it seemed to work great. That's when I started to have problems.

For some unknown reason, the signal strength weakened down to 50%. We have several other devices that can link to our router wirelessly and none of them were having any issues from that same spot. I messed with numerous settings with no luck and made sure all of our other wireless devices were off. At this point, the desktop it was plugged into is a couple rooms away, maybe about 25 ft from the router. I decided to unplug it and install it on the desktop right next to the router. Blammo, no problems at all, signal strength good, connection quality equally as good. I left it like that for a while, even downloaded some stuff, trying to see if I could get it to crash, and it never did; it worked just fine.

So, after browsing forums and the manufacturer's site, I decided the only thing left for me to do was to try moving the device closer to the router. Fortunately, I found a spot only a few feet away from where I originally wanted it and -- surprise! -- it worked just fine.

After all that, it seems to be working fine enough for what I want to use it (although the signal strength is still only at about 70%). My recommendation is that it's definitely good for it's price, but it's not the best thing in the world, and if something goes wrong, expect to be doing a lot of troubleshooting and most likely finding very little in terms of assistance.

EDIT - Now, once again, I am having connection issues despite ZERO changes to the organization of all equipment involved. Can't say I'm too happy about this. If I figure anything out and it starts working consistently, I'll change the review score.
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9 people found this helpful

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From the United States

Carl Crawford
5.0 out of 5 stars Works great with Raspberry Pi once I got it configured
Reviewed in the United States on May 29, 2013
Verified Purchase
I tried for days to get this configured. Here is so much conflicting information out there. Finally I found a script to automatically install it. Here are the instructions:

Installing your rtl8188cus wireless adapter:
--------------------------------------------

If you are installing your first wifi adapter or adding a new wifi adapter to a Pi that
already has a different one installed the driver should be installed BEFORE plugging in the
new wifi adapter.

DO NOT PLUG IN THE WIFI ADAPTER UNTIL ASKED TO - LOOK AT THE SCREEN OUTPUT FOR INSTRUCTIONS.

So connect up your Pi then power on and wait for it to boot and initialise. Log in and then
you can start to install the software/firmware for the wifi adapter.

Some images need configuring when they are first run so go through the configuration before
running the sript. After the image is configured you can start the script to install the wifi.

If you have an internet connection to your Pi you can now download the script. Use the
command:

sudo wget http://dl.dropbox.com/u/80256631/install-rtl8188cus-latest.sh -O /boot/install-rtl8188cus-latest.sh

This will install the script in the /boot directory of the SD card ready to run.

If you are NOT logged in as root start the script using the command:

sudo /boot/install-rtl8188cus-latest.sh

If you are logged in as root use the command:

/boot/install-rtl8188cus-latest.sh (no sudo!)

If you are connected to the Pi using ssh, and not logged in as root user then you may need
to use the command

sudo bash /boot/install-rtl8188cus-latest.sh

or if logged in as the root user.

bash /boot/install-rtl8188cus-latest.sh

The script should now start running. I have written the script so it will output messages to
the screen so you can see what it is doing as a lot of the time there is no output to the
display.

If you have not used the script before it will make an update to the kernel configuration
to allow you to run with the wifi adapter plugged in before the driver is loaded. This
configuration change will disable a built in driver that does not work and causes problems
if the wifi adapter is plugged in before the working driver is installed. After making the
change it will shutdown the Pi. You can then plug in the wifi adapter and power on again
and thePi should run without problems. You can then run the acript to install the wifi
driver and configure the wifi.

At the beginning of the installation the script will make several checks. It will check if
you have an internet connection, wired or wireless, and you have access to the internet. It
will try and determine if you already have a wifi adapter configured.

If you do not have an internet connection to your Pi it will check it has all the necessary
files to install and run the wifi driver. If it does not have all the files it needs it will
output a list of files it does not have and will abort the installation. You will have to
download the files it requires and copy them to the /boot directory of the SD card and
restart the script.

For some images it may be necessary to install some additional applications to allow the
wifi to operate correctly. The script will install these before configuring and installing
the wifi driver. If your Pi doesn't have an internet connection and these files are not
copied to the SD card the script will list the files it needs and then abort. You will need
to download and copy these files to the /boot directory of the image.

To copy missing files to the Pi there are basically two ways to do it. You can shutdown the
Pi, remove the SD card and plug it into the computer used to generate the image in the first
place. Then download the missing files on that computer and copy them to the SD card.

Alternatively you can download the files needed on another computer with internet access and
then copy them to a USB stick. You can then install the USB stick in the Pi and copy them from
the USB stick to the SD card. To copy files to the /boot directory you will need to run the
commands as root user. As I understand it a USB stick would normally be automatically mounted
in the directory /media. The command

ls /media

should then show the device name. You can then copy the files using the command format

sudo cp /media/device-name/filename /boot

I have, however, found that devices are not always mounted automatically so you must first
mount the device manually. Using the command

sudo mount /dev/sda1 /mnt

will mount the device in the /mnt directory rather than /media. The files can then be displayed
with the command

ls /mnt

You can then copy the files using the command format

sudo cp /mnt/filename /boot

When finished copying the necessary files do not forget to unmount the USB stick -

sudo umount /dev/sda1

Once all the files are copied to the SD card restart the script. It will again check all the
files needed are available on the SD card and then start the install.

If you already have a wifi adapter installed it will ask if you want to update the driver or
add a new wifi adapter. If you are using an image that already has the rtl8188cus driver
installed and it no longer works because you have made a software update you can update the
driver to repair the driver installation. If a wifi driver is already installed, either
using a different driver or the rtl8188cus driver, you can add another wifi adapter. You can
then use either adapter or even use both. You can use this option to install a new wifi
adapter if you don't want to use your old adapter, although the Pi will still be configured
to run the older adapter if necessary.

After the driver and any other files needed are installed the script will then configure the
files needed to use the wifi. It will first ask you the type of security the network uses if
any. eg unsecured, WEP or WPA/WPA2. It uses this to determine some of the settings needed
for the installation and whether you need to input a PASSWORD. The script will not ask for a
password if you selected unsecured as the network security.

The script will then ask you to input the network SSID and a PASSWORD if it is required.
Type in the SSID and then the PASSWORD. These values will be copied to the file
/etc/network/interfaces as part of the setup. When inputting the SSID and PASSWORD the
script will ask you to verify that they are correct before using then.

A recent addition to the script is a check to see if the wifi network you want to connect to
is visible by the wifi adapter - that is it is transmitting it's ssid. With the basic setup
used by the script a wifi adapter will not be able to connect to a network that does not
transmit it's ssid. When the script gets to the point where it asks for the ssid of the
network you want to connect to it will check the name is in this list. If it is not it will
let you know. To get a connection you should reconfigure your wireless network to transmit
the ssid.

Once the SSID and PASSWORD have been input and verified OK the remaining files will be
configured to ensure the driver module is automatically loaded whenever the Pi is restarted.

The wifi driver should now be installed and configured. The script will output a message
asking you to plug in the wifi adapter. Plug in the wifi adapter and press any key to
continue.

It will wait for the wifi to connect then output some information about the network
connection. It will show details on the wireless setup and should show you the IP address
assigned to the wireless adapter. You can terminate the installation at this point by
pressing Cntl-C.

If you do not terminate the script it will then continue on and update the software packages
list and upgrade the installed software packages. This can take a long time especially if
you are using any of the older images.

The script will then install rpi-update if it is not already installed. The rpi-update
script, developed by Hexxeh, updates the Pi firmware/software.

The script will now check if the driver that is loaded is the latest available or not. If
the installed driver is the latest the script will terminate and the wifi should be working.

If the driver is not the latest version rpi-update will be run to update the Pi's
firmware/software and then the final stage of the installation is to update the wifi driver
to the latest version.

If rpi-update is run by the script when the script terminates the Pi will reboot. If rpi-
update does not run the script will just terminate and you can continue to use the Pi.

When it has rebooted, login - AND START TO HAVE SOME FUN.

HAVE FUN WITH YOUR RASPBERRY PI.
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D.C. Pennington
5.0 out of 5 stars Low expectations, fantastic outcomes so far
Reviewed in the United States on July 30, 2012
Verified Purchase
I really was expecting these to be a failed purchase. I thought I'd give them a go almost as a novelty... I feel silly now, as they are brilliant. Driver dependency is heavy, don't expect to just plug them in and go as some of the larger clunkier ones would allow with onboard drivers or the ability to use generics. But really it would be kind of giddy to assume otherwise with these things that are so small as to seem unlikely to be effective in any real-world applications.

I would do a pro / con, but have no cons.... Perhaps because I just expected the worst, leaving me with nowhere to go but up.

- Size: Tiny - I can *almost* close the USB flap on a Dell Duo Convertible with the thing in. I would forget they were in a USB hub if not for the flashing LED. They are practically nonexistent in a tower USB port, front or back.
- Reliability: I have used them in odd situations, and have yet for them to be the source of an issue. Mixed NIC environments present the usual hazards, but nothing additional that I've noticed.
- Range: Again, I have had low expectations, and so I used them mostly so close to the wireless source that I couldn't judge fairly. They have fit the bill at 25+ feet from the nearest active AP handily. Walls and obstacles have not buggered the connectivity. That's more than I would have expected, your situation may differ.
- Price: Cheap, especially considering the awkward situations that they can be used to resolve temporary issues and the time sink potential in those situations if you don't have a quick-and-dirty answer. I will likely keep a small stack of them around indefinitely.

So far I have used these in scenarios like:

- Emergency connectivity for DNS server mishaps on domains
- A replacement for troublesome hard-connections in nearby Win 7 64 workstations
- As a makeshift NIC array via a USB hub for Windows 2008 R2 Datacenter servers requiring multiple connections but lacking the hardware
- Onboard fail-safe connection (by pluging one into the unusually placed USB slots on Dell and Supermicro server boards, just leaving them there,disabled or otherwise inactive, just in case all other options are bunk)
- Near invisible wireless connections on Netbooks, Dell Duo Convertibles, Legacy laptops.

I can't attest fully to their cross platform usage yet. But I have several unusual server and wokrstation builds across the SUSE and Ubuntu spectrum that I will certainly be giving them a test on. I have a pretty fair expectation that as long as the drivers install as expected, they will be effective there too...

I have used them as a guest captured NIC for Linux and Windows virtual appliances and servers with some success, but as there is a significant abstraction layer there, that doesn't seem like an overall statement about their usage in a standalone environment.

So this is one of those times when a shot-in-the-dark actually has paid off in volume... I would (and will) purchase more of them, either for specific applications or more likely as a brilliant addition to my "what if" toolset.

If there is a downside, I haven't found it yet...and I have used them in some pretty weird circumstances so far... There may well be better out there, I just stumbled on these, didn't really invest in thorough product research. I grabbed some of these along with other variant wireless and USB NICs for emergencies and peculiar issues.

These are the ones I have used almost every time. The rest of that collection of variants remain safely boxed on the shelf.
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Amazon Customer
5.0 out of 5 stars Shipped quickly, works well, great for quick connection.
Reviewed in the United States on December 17, 2013
Verified Purchase
This product was priced great and arrived to me quickly. It was a plug in and go type of product. The install disk was easy and quick and my connection started with no problems. So far I have used this product as my wireless connection source in a mid size condo and haven't had any issues. The speed of the connection is good for email, searching web, youtube videos. I haven't done any extremely demanding tasks on the internet with it but I knew I wouldn't have to. I just needed a wireless adapter for a simple internet connection and for the price of this product it is perfect. I'm not saying that it isn't capable of producing quick speeds for high demand internet use but I just haven't had the need for that yet. I would recommend this product to any personal friends/family who needs an internet adapter. It is small, sturdy, and hardly noticeable in the computer. I am very happy with this product and am glad I can send a laptop to a friend in working condition because their wireless card was fried. $10 and free shipping was a great deal. I intend to leave the product in my USB spot constantly so putting it in and out won't be a concern for me. Every time I open the computer it automatically connects so it's maintenance free in those regards. I use it in a HP laptop running Windows Vista. No problems, I would buy it for the cheap price. If any problem does surface with this product I will be sure to update my review accordingly.
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G. Bowman
4.0 out of 5 stars Very Nice Little Adapter - software a little buggy...
Reviewed in the United States on December 3, 2013
Verified Purchase
This little adapter works and at a great price! Its wonderfully compact and the speed feels comfortably fast on my older system.

That said, it was not easy to set up, but Edimax Customer Support was very helpful. I think the ease of setup has a great deal to do with your wireless router and the router's software. At the time of purchase, I had a Linksys E3000 router. I hate that router (and I used to LOVE Linksys routers! The hardware was very serviceable, but the software was abysmal!)!

I purchased this adapter for an old Mac 1.6GHz PowerPC G5, running Mac OS 10.5.8 (Leopard), which did not have built in WiFi. I use this system for older applications that I still need access to (or for when my kids need internet access).

I downloaded the software from the Edimax site. Setup went smoothly. The Edimax Wireless Network Utility must run in the background to allow wireless access like other wireless adapter of this type. The Edimax Network Utility showed I was connected to my wireless network with my Linksys E3000 wireless router. However, the E3000 required a static IP address and completely manual setup to get a connection to the internet.

When that router (Linksys E3000) recently died, I replaced it with an Apple Time Capsule. Once I started up the Network Utility, I easily connected to the network. Next I deleted my old Network Adapter profile in Network Settings and set up a new one, entering the DNS server and Search Domain addresses. My IP address was immediately supplied by DHCP and I had my internet connection.

During use I found that I while can set up the Utility to startup when the system does, I must sign on to the network each time to get network access. The network password does not appear to be saved. With the E3000 this process usually took MANY attempts, over as much as 30 minutes time. Adding devices with the E3000 was alway a chore. With the Time Capsule, connection was immediate. It may be possible to set the Network Utility to auto-connect to the internet, but I have not been successful.

Use of this adapter is much easier with the Time Capsule. I just start the Network Utility, select the profile and click "apply". Enter the network password and click "connect". I then can hide the Utility and use whichever browser or access network drives as I desire. When I finish network activity I quit the Network Utility.

There is one really odd thing I noticed which is why I gave this router 4 stars instead of 5 and why I quit the Network Utility immediately after use. I was working at my main station in my office while one of my kids left the G5 on and walked away without shutting down (again!). After a while, I hear a sound that started low and increased and increased in volume until it sounds like there is a jet plan in the office with me! It was the fan on the G5! I couldn't make it stop or shut the system down normally. I had to literally pull the plug.

As it happens with my kids, they forgot to shut down on other occasions. If they were simply using Word or Powerpoint, no fan. If they browsing the internet... jet plane. I realized that if the Network Utility was left running while not in use, and the computer went to sleep, the G5's fan would kick on with ever increasing speed. Weird! If the computer was left on and the Network Utility was off, this did not occur. While I have not tried to repeat the jet plane/fan experience since installing the Time Capsule, I don't need to. I never let the G5 go to sleep with the Edimax Network Utility on.

I believe there is a software issue here. I had a Netgear Wireless G54 Adapter prior to this. It worked poorly on the rare occasions that it worked, but its software never turned my system into a jet plane. This adapter WORKS even if there is a bug and the workaround is simple - just don't be lazy, turn the software off when not in use. For the price, I'm very satisfied.
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Oofer
1.0 out of 5 stars Works but you might need to do some troubleshooting
Reviewed in the United States on September 18, 2013
Verified Purchase
Right off the bat I'll say that you should prepare yourself to do some troubleshooting, which might include moving your device closer to the wireless signal.

It's very small, doesn't seem all the fragile as some have mentioned (I ended up removing it from USB slots and re-inserting it a bunch of times in a short time span with no apparent loss of fidelity), and the driver installed just fine. For the first couple of hours it seemed to work great. That's when I started to have problems.

For some unknown reason, the signal strength weakened down to 50%. We have several other devices that can link to our router wirelessly and none of them were having any issues from that same spot. I messed with numerous settings with no luck and made sure all of our other wireless devices were off. At this point, the desktop it was plugged into is a couple rooms away, maybe about 25 ft from the router. I decided to unplug it and install it on the desktop right next to the router. Blammo, no problems at all, signal strength good, connection quality equally as good. I left it like that for a while, even downloaded some stuff, trying to see if I could get it to crash, and it never did; it worked just fine.

So, after browsing forums and the manufacturer's site, I decided the only thing left for me to do was to try moving the device closer to the router. Fortunately, I found a spot only a few feet away from where I originally wanted it and -- surprise! -- it worked just fine.

After all that, it seems to be working fine enough for what I want to use it (although the signal strength is still only at about 70%). My recommendation is that it's definitely good for it's price, but it's not the best thing in the world, and if something goes wrong, expect to be doing a lot of troubleshooting and most likely finding very little in terms of assistance.

EDIT - Now, once again, I am having connection issues despite ZERO changes to the organization of all equipment involved. Can't say I'm too happy about this. If I figure anything out and it starts working consistently, I'll change the review score.
9 people found this helpful
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Kindle Customer
3.0 out of 5 stars For XP Users and Novices, Not Easy to Install
Reviewed in the United States on September 22, 2013
Verified Purchase
I read another customer review, mentioning that novices would have trouble installing it to XP operating systems. I did appreciate his comments because he was an expert user and he was right.

I purchased this USB adapter to replace a broken LAN card inside my Acer Aspire One XP netbook, which is a few years old, but still compatible to use for remote access to workplace XP PCs. I also needed my Acer Aspire One to access my ASUS RT-N66U Dark Knight Double 450 Mbps Dual N Band Router.

Pros:
It is small, inexpensive, and once you do successfully install it, it does work.
I tried watching 2 min clips from Hulu. It did perform adequately, but the speed of the connection varied widely from 14.2 to 58 mpbs during playback. My other Windows 7 laptops with working LAN cards did achieve 72 mpbs.
It is adequate for accessing emails and regular websurfing.
The Edimax adapter picked up signals roughly 25 to 30 feet away from me, separated by 2 walls, on the same floor. Because I don't have multilevel housing, I don't know if it will work vertically. I plan to use it in my office building to see if it can pick up weaker signals.

Cons:
It runs slightly hot. Since it is so tiny, I don't know if the heat will shorten its life. My netbook runs hot, too, which will affect the adapter's ability to disperse heat.

The installation was pretty difficult. I think it might have been easier had I used Windows 7.

Throw away the Quick Start Guide. It is a waste of time. It says only 3 things that are useful. Turn on your computer first. Then plug in the adapter. Cancel the Windows Hardware Wizard when it asks you if you need help installing it.

It does not say to turn off your broken wireless LAN switch, which I did. Older devices will have these switches. You should deactivate your old LAN device through the START menu or Control Panel, if you don't have a switch.

I also removed old network wireless connection SSIDs by right clicking the wireless icon and then choosing "View Available Wireless Networks," then "Change the Order of Wireless Networks." I deleted the old ones in preparation for connecting with my new router.

Restarting may be a good idea.

After plugging in the adapter, you are supposed to use the CD to install software. Throw it away. The drive won't read it.

To get the software, I used an ethernet cord plugged into the router, went to Google, and found [...]. Oddly, the website is not written anywhere on the packaging, start guide, or CD.

Save yourself time. Here is the link to the download site for the XP device driver and utilities:
[...]

Click on "driver" at the bottom of the screen. Don't bother downloading the "Manual." It is the Start Guide and nothing else.

After you are done unzipping the files and installing them, you will be prompted to restart your computer.

Meanwhile, you can connect the router to another laptop, using it to access the router dashboard software that shows the network traffic and security settings at the usual 192.168.1.1 site online. The new adapter should be accepted as a Client.

At some point, unplug the ethernet cord from the ACER netbook.

2 wireless icons will be X-ed out. The Edimax icon looks like a misshapen Twinkie.

The wireless icon that is connected to the broken LAN card will always stay inactive.

"Wireless Network Connection 2" is the icon associated with the adapter. You will want this one to work.

The tough part is getting the adapter to recognize the router. After clicking the twinkie icon, I could tell that it was trying to associate with the router. The SSID would flash, the IP address would register, but then the numbers would go to zero, zero, zero. I went to the security tabs in the Edimax icon, thinking that typing in the WPA2 passcode would help. It is definitely important, but still no results. I tried disabling and re-enabling the adapter to no avail. I activated AP and then changed back to Station settings. Then I tried the security tabs towards the end, which did not help at all. I rebooted again. Still no change.

Finally, I went to the "Wireless Network Connection 2" icon in the Task Bar and used Windows to repair the connection. The adapter finally worked.

It took me about 3.5 to 4 hrs of doing this, while answering phone calls and trying to eat, before I could get it to work.

Customer Support is nonexistent and does not explain all the security terms and funny addresses, which someone like me would not understand.

I will decide in one month, whether I will change my rating up or down.

Update:
9/23/2013
I re-entered the websites for information because amazon did not allow me to paste it in. I re-typed the websites again.

On the 6th floor of my office building, I was able to detect one Wi-Fi signal at 26% strength, ? 2 bars or so.
The EW-7811Un could not detect the weaker out of the 2 Wi-Fi signals that are available.
The Acer Aspire One old broken LAN card was able to tell me that 2 signals were out there, although it could not connect.
That still means the EW-7811Un could not detect all reasonably available signals, which is a shortcoming.

The good news is the EW-7811Un was more speedy today, for some unknown reason. I could get 90 to 120 mbps out of it. The old netbook was slow, however, because it has a single core Atom chip. After the MacAfee Antivirus software quit monopolizing the CPU, I was able to appreciate the quickness of the signal.
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Colegate V. Spinks
5.0 out of 5 stars Inexpensive, Easy Install, High Quality, Very Durable, and Extremely Reliable
Reviewed in the United States on March 6, 2019
Verified Purchase
Some how my son managed to kill the WIFI network in his laptop computer. Rather than face an expensive repaired and being without the system for an extended period of time, I ordered one of these and in two days he was back up and running and it has never missed a lick. Sometime later, I had loaded one of my older laptops to my ex-wife, and again somehow the internal WIFI interface managed to die. Edimax to the rescue, I ordered my second adapter and gave it to her when it came it. Not very technical, she managed to install the device and drivers and configure it for her home WIFI network. This makes the third one I've ordered. Not due to a failed interface, but a desire to have my desktop system wireless. I decided to move my cable modem/WIFI router combination to another room rather than were my home office is located. So I installed this is my desktop system and now it's off and running wireless. Eventually I will be setting up another system for my younger son and it to will have one of these and be wireless as well.

A few months have past and I'm continuing on my process of making all the devices in the house wireless. Been doing some reading and was wanting to get more speed out of my wireless connection on my primary desktop. As it stands, it this Edimax has plenty of speed for browsing, YouTube videos and most of the time Streaming Videos. I do a lot of remote desktop to work and on occasion I was getting some lagging and have upgraded this one to an Inamax AC1200 which I will review over there. I've moved this one on the another system in the house. Great performer and never misses a step.
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RP
5.0 out of 5 stars Cheap, works perfectly, is small enough that it doesn't get in the way
Reviewed in the United States on May 6, 2016
Verified Purchase
My mother's laptop's wifi router broke and she had it in her mind that she was going to have to get another computer. I bought her this little thing instead. She's very, very happy with it. $10 saved the cost of having to buy a new laptop PC.

The computer hasn't been updated to Windows 10 yet, but it works perfectly with Windows 8. The speed is great for browsing and while I haven't pushed it on video that much, I have watched a few youtube videos to test how well it could handle the load and it was perfectly fine.

Installation wasn't too bad. I did have a slight hiccup from not quite understanding a direction, but nothing so bad that I'd knock a star off it. Anyone should be able to install this, at least so long as you have an optical drive. (And even if you didn't, I'm sure the company let's you DL the driver software on their site.)

I'm sure there are more powerful USB wifi routers people could get if they're going to use, but while I considered some of them, I was really won over by the tiny design of this. You can put it in a bag or carry it around and there's no big antenna getting in the way, and most people would look at the PC and not even notice there's an adapter in the computer at all.

So... for anyone who's wifi router is on the outs but is otherwise happy with their computer, give this a try. It may just give your PC a little extra life -- and save you some big bucks in the process.
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Longtime Customer
5.0 out of 5 stars Windows-10 Software Updates That Work!
Reviewed in the United States on August 23, 2016
Verified Purchase
I recently upgraded my old Windows-7 laptop to the “free” Windows-10 promotional offered from Microsoft. Even under Windows-7 the WiFi interface had been problematic and the issued continued under Windows-10. Given the advanced age of the laptop, I didn’t want to invest a lot of money fixing the WiFi. In reviewing Amazon’s USB WiFi solutions, the Edimax EW-7811Un appeared to be likely low cost solution were it not for the large number of negative reviews which were offset by the still larger number of positive review. I decided to take a chance and ordered the Edimax EW-7811Un.

When the Edimax EW-7811Un arrived, I was able to use the default Windows-10 and Mini CD-ROM to install the driver and support software; however, neither solution worked for longer than several minutes before failing. Most troubling was that the Edimax EW-7811Un “ALMOST” worked.

When I read the current product reviews, as they pertain to Windows-10, I realized that my experience was not unique and there were a number of unhappy people who ordered the Edimax EW-7811Un for use with Windows-10. In reviewing several USB WiFi solutions on Amazon, I noticed that the Windows-10 upgrades were more problematic. This could be caused by (1) older and slower hardware or (2) the Windows-10 upgrade image was not quite the same as a native Windows-10 image.

For several days I considered writing a scathing review while devising alternative solutions but kept returning to the fact that the software was almost on the cusp of working. Finally, I called the Edimax support number, expecting technical support Hades, only to be quickly connected with a knowledge support technician. When I described the problem, the technician indicated that the wrong software was being distributed for Windows-10 and provided guidance on where to find the correct software, which was not on the primary Edimax website. As Amazon doesn’t support the posting of URL’s, the following navigation is provided on where to find the correct software:

Navagation: edimax.us | support | download drives

On the “Driver & Manual Download” page, go to Section 7 and download the ZIP compressed driver EW-7811Un Win v1.0.1.4, which is the first entry in Section 7.

I used a tablet to download the file EW-7811Un_Windows_driver_v1.0.1.4.zip and then transferred the file to Windows-10 using a USB interface. Un-ZIP the file, using Windows-10, and then run the program “Setup”. This not a GUI and runs under a DOS shell, so just wait until it completes. As Edimax Support recommended, reboot your Windows-10 system, and you should be good to go!

A few off-the-cuff observations:

(1) A built-in laptop WiFi generally has a hidden and sometimes large antenna under the case. The Edimax may not work in WiFi marginal areas of your home. There are Edimax products with large external antennas but these will not have the small form factor of the Edimax EW-7811Un. If the connection is very poor the Edumax is flagged as “Turned Off” and you may have to use Windows-10 to re-enable the WiFi. This could be a bug!

(2) I noticed that the Edimax EW-7811Un sometimes appears to go to sleep. Turning Device “Power Management” OFF may correct that problem.

I have now run a four hour series of serious stress tests and, with the exception of marginal areas in my home, the Edimax EW-7811Un has performed well. I am giving this product “Five Starts” because of the good performance at a very affordable price point. Yes, Edimax’s software quality control was troubling in this case, but I would give their Technical Support “Six Stars” without a second thought.

Microsoft Windows-10 upgrade policy was highly innovative and has given new life to older hardware and after market upgrades such as the Edimax EW-7811Un. Edimax and Amazon have to do a better job of communicating the good news to their customers.
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Juhachi
4.0 out of 5 stars Decent range, does as advertised
Reviewed in the United States on April 27, 2014
Verified Purchase
I bought this after my computer's internal wireless card malfunctioned and could no longer connect wirelessly to any network. After reading the reviews, I was interested most in the range, which in my experience is decent, but could be better. Right now, I'm about 35-40 feet from my router through a couple of walls, and I have a signal strength of 50-60%, and a link quality of 90-99% (it tends to fluctuate constantly, though this doesn't seem to affect my connection). Obviously, when I'm closer to the router, I get a better signal, but even only getting about 50% signal strength, the connection is still fast, and doesn't lag at all, so in that way, I'm very pleased, and for a tiny adapter like this which you can barely notice is even there, it's a good enough range.

I've had it for about 10 days now, and generally my experience has been good. There was one problem that came up that I seem to have fixed, however. I noticed that whenever I tried to download anything, my speeds were far below than what they should be, and while the download was active, I couldn't surf the internet from the intense lag. I thought this might just have to do with the adapter's radio, but being closer to the router didn't seem to make this better, even if the signal strength was shown to go up. So this is what I did. I have Windows 7, 64bit, but basically I opened up the properties for the adapter (network and sharing center --> change adapter settings --> right click adapter) and clicked configure. In the advanced tab, I changed the Network Type from "Infrastructure" to "Auto select". I also changed the Wireless Mode from b/g/n to b/g (I have an old router that doesn't support n), and bam, I was suddenly getting download/upload speeds 5 times as fast, basically what I was getting before my internal wireless card went kaput. I don't really know what the "infrastructure" setting meant, or if the b/g/n mode was somehow interfering with my older b/g router, but regardless, my problem has been fixed and I'm very happy that I don't have to buy a new router and/or usb adapter.

As for the installation, it was very quick and easy. I just plugged in the adapter, then loaded the mini CD, installed the driver from the CD, and it worked instantly.

Practically the only thing I kind of dislike about it at this point (after fixing the speed problem above) is the annoying blinking blue light on it when it's active. I don't need an adapter to blink to tell me it's on or working; that's what the software utility it comes with is for, or I can just look in my device manager. So I just used some black electrical tape to go over it so I don't have to see it anymore.
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