Wiimote Expansion Port

From HwB

Available at the Wiimote, remote control of Nintendo Wii.

For connection of Classic or Nunchuck controller to Wiimote.

Pinout

|~~_____~~|
|         |
|  6 4 2  |
|  -----  |
|  5 3 1  |
\_________/

From the Wiimote side

Pin Cable color Description
1 Red 3.3V
2 Yellow SCL. I²C Serial Clock. (400 kHz)
3 Red Connected to 3.3V inside attachment connector
4 - Not connected.
5 Green SDA. I²C Serial Data
6 White Ground

Notes

Source