You can talk to the wiimote over I2C. But I have only been able to get the wiimote to relay commands from a PC to the expansion port/microcontroller. Basically the PC tells the wiimote to send data to the expansion port.
I haven't figured out a way to directly read the IR camera data over the expansion port. My guess is it is not possible. From everyones reverse engineering, the expansion port is only able to read a small memory area in the wiimote. ( http://www.wiili.org/index.php/Wiimote/Extension_Controllers/Nunchuk )
Without a PC, you can't tell the wiimote what to put into that memory area. Hardware wise it is probably possible, but software wise, I don't think the wiimotes firmware has anything built in to send the IR data out through the expansion port.
You can talk to the wiimote
You can talk to the wiimote over I2C. But I have only been able to get the wiimote to relay commands from a PC to the expansion port/microcontroller. Basically the PC tells the wiimote to send data to the expansion port.
I haven't figured out a way to directly read the IR camera data over the expansion port. My guess is it is not possible. From everyones reverse engineering, the expansion port is only able to read a small memory area in the wiimote. ( http://www.wiili.org/index.php/Wiimote/Extension_Controllers/Nunchuk )
Without a PC, you can't tell the wiimote what to put into that memory area. Hardware wise it is probably possible, but software wise, I don't think the wiimotes firmware has anything built in to send the IR data out through the expansion port.