Serial
WNR2000v1
The serial port is at JP1: 115200 8N1 at 3.3V. Pins are, from left with the ethernet ports above: [Vcc] [Tx] [Rx] [GND]
WNR2000v2
The serial port is at JP1: 115200 8N1 at 3.3V. Pads are, from top to bottom with the ethernet ports above: [Vcc] [Tx] [-] [-] [Rx][GND]
WNR2000v3
The serial port is at JP1: 115200 8N1 at 3.3V. Pads are, from left to right with the ethernet ports on right: [Vcc] [Tx] [Rx] [GND]