TP-LINK TD-W8970 v3

Overview
"2011500170" is silkscreened on the board in the FCC photos.
 * Antenna: 2x 5dBi @2.4GHz
 * USB port: 1x USB 2.0

Serial Pinouts
The pinout would appear to be the following... J3 [TxD] (RxD) (GND) (3.3) v Hint: You have to short two missing resistors beside Tx & Rx
 * to USB port
 * to USB port
 * as shown in fcc photos of refernce board.