I got Raspberry Pi 2 as my birthday gift (woohoo), I then download:
RASPBIAN (Debian Wheezy) (2015-02-16)
After booting into Linux, I'm not seeing wlan0 when I issue ifconfig, I also seeing following message after issuing dmesg:
R8188EU: ERROR indicate disassoc
I'm trying to use USB Wireless Network Adapter - USB to Wireless N Adapter | 802.11N | StarTech.com
Please advise
I found the answer to your problem in Raspberry Pi Stack Exchange (Wifi Dongle not appearing in lsusb), you need to install youre wifi dongle's firmware. Quoting the accepted answer:
From the dmesg output, you see that the driver r8188eu recognizes the WiFi dongle, but cannot load firmware for it, since the firmware file cannot be found.
The Raspberry Pi forum has two threads about getting these WiFi devices to work under Raspbian.
Normally USB devices can be seen in the lsusb output even if a suitable driver is not available. I believe the dongle did not show up, because it is disconnected when the firmware is not found, as the last two dmesg lines show.
I found that the regular Debian package firmware-realtek contains the required file. This would be a clean and convenient way to get it, but on my Raspbian I don't have this file, even though the package is installed.
and here I found the one for my raspbian (#781) and the firmware can be downloaded from here (just clic on "raw")
