TP-LINK Archer T4U

Overview

 * • 866Mbps - 2-stream 802.11ac device (433Mbps per stream),
 * • 300Mbps - 2-stream 2.4GHz channel = 1200 Mbps class

"2052500409" and the TP-LINK logo is silkscreened on the board in the FCC photos.

The USB ID for this device is per the driver set for the Amped Wireless ACA1.
 * The device description matches up with TP-LINK's tag line for this device.

Links of Interest

 * TP-LINK Archer T4U Teardown on MakerForce (internal images)
 * WIP Linux Driver: rtl8821au • rtl8821au • rtl8812au • rtl8812au_rtl8821au

Review of Linux Compatibility
TP-Link Archer T4U is a USB WiFi adapter for WiFi connections to 802.11ac standard.
 * The stick supports USB 3.0 and has the USB ID: 2357:0101

BUS 002 Device 023: ID 2357:0101 The stick bases on the Realtek RTL8812AU chipset, which currently
 * is not automatically recognized by the Linux kernel.

Pictures
Retail Images 

Edimax Driver
*A driver for the Realtek chipset of the T4U is provided by Edimax.
 * However, the USB ID of the TP-Link Archer T4U is not known to this driver.
 * Therefore, a patched version of the Edimax driver exists, where the USB ID was added.

Open Source Driver
There is also an open source driver under development. This driver can be downloaded from GitHub: git clone https://github.com/abperiasamy/rtl8812AU_8821AU_linux.git cd rtl8812AU_8821AU_linux/ As of Oct 16, 2016 this driver contains the USB ID of the Archer T4U.

The driver can be compiled and installed with: make sudo make install If the TP-Link Archer T4U is plugged in, the kernel module rtl8812au should be loaded automatically: usb 1-1: new high-speed USB device number 2 using ehci-pci usb 1-1: New USB device found, idVendor=2357, idProduct=0101 usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: 802.11n NIC usb 1-1: Manufacturer: Realtek usb 1-1: SerialNumber: 123456 cfg80211: Calling CRDA to update world regulatory domain 8812au: module verification failed: signature and/or required key missing - tainting kernel cfg80211: World regulatory domain updated: cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) cfg80211:  (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) cfg80211:  (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) usbcore: registered new interface driver rtl8812au