I'm using Raspberry Pi model B+ V1.2 to which I want to connect TP-LINK TL-WN823N Wireless N USB Adapter.
I have connected device and this is what happened:
pi@raspberrypi:~ $ lsusb -t
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/5p, 480M
|__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 4 80M
|__ Port 5: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M
As we can see, my Raspberry Pi doesn't recognize my wireless USB adapter.
I thought it's a problem with my 1.7A power supply but I have changed to 2A PS and still it doesn't work.
lsusbreports what the devices report, i.e., no driver of any sort is required, it is simply basic USB protocol stuff. I presume you are sure the adapter is working? That device has several versions; one uses a RealTek 8192CU chipset for which Raspbian does include a driver, but there is no point in loading it if the device isn't even recognized (and if it were, the driver should be loaded automatically based on the chip identifying itself with the USB protocol).sudo apt-get install firmware-realtekAlso share the output oflsusb -v. there might be some clues in therelsb -v, it appears the dongle you have uses a Realtek chip - RTL8192E (vendor id 0x2357 & product id 0x0109). Given the firmware is already updated, It would be helpful to know the o/p of theuname -a(kernel version),cat /etc/os-release(os name and version),lsmod(currently loaded driver modules). My suspicion is some kind of kernel/driver/firmware mismatch has occured (has happened to me when applying dist-updates). If you have a spare card, could you try installing raspbian jessie (or jessie-lite) and see if the problem persists ?