EDIMAX EW-7811UN on Raspberry PI

check usb hardware detection

A good USB WLAN adapter for the Raspberry Pi B+ is the EDIMAX EW-7811UN

Sample output:

the EDIMAX EW-7811UN uses the driver rtl8192cu

check network devices

check power management mode

On some chipsets the power saving mode is enabled by default. This means that the adapter turns off the network connection when inactive. Let’s check:

Sample output:

disable rtl8192cu power management mode

When using the driver rtl8192cu you can create a configuration file for the driver with the editor of your choice e.g.

Add the following content

The Raspberry Pi should be restarted for the shutdown to take effect.

configure network device

Edit the network device file with the editor of your choice e.g.



restart network

Check if the device got an ip address

To display information about wlan0 wireless interface

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