WiiLi.org

[Snark]

I noticed that the flashing lights during the time that the Wiimote is trying to connect roughly indicate the level of energy stored in the batteries. Three lights showing means 75% or less, 2 lights ~ 50% or less, 1 ~ 25% or less. Based on that, I think wmgui is reporting the battery levels incorrectly. I popped in relatively fresh set of batteries and wmgui reported 74%, but all four lights blink on the Wiimote during the time it is trying to connect. So then I popped in a brand new pair straight out of the box, and Cwiid reported them at 89%. They could have been shoddy for whatever reason, but 11% drained right out of the box? That seems like a lot.

wmgui must be off by ~ 2% or more from the Wiimote's own value when reporting the battery status, or maybe I'm just missing something here.

[Swatch]

I noticed the same, but after some more observations I came to the conclusion that for the first 50% the LED's are at full-4, after that they register 3 at about 38%-40% 2 at about 25% and 1 at less than 15%.

As far as being charged outta the box, most batteries aren't quite at their full potential, using rechargable batteries I've gotten the percentage up to 95%.

[abstrakraft]

I've been using one Wiimote for all development of CWiid, since ~mid-December, and it still shows 4 LEDs when trying to connect.

Batteries are pretty inconsistent as far as power sources go, and charge measuring algorithms generally favor cheap rather than precise (don't compensate for internal resistance).

That being said, I'm not sure about the 100% mark. The wiki here suggests that it "might" be 0xC8, so I overshot a little and made it 0xD0, so it may read slightly low, though not 11% low. If anyone finds out for sure that the correct value is lower, I'll change it.

If anyone has access to a precision DC voltage source (and appropriate know how), set it to 3.0 V, and check the Wiimote status output.
_________________
"I seldom let practicality get in the way of my fascination with shiny things and blinky lights."
- some guy
http://abstrakraft.org/cwiid

[Snark]

[abstrakraft]

Investigation - definitely. Down the road - definitely.

Perhaps there are differences in Wiimotes? Is it to early to suspect different hardware revisions? Also, my Wiimote is a Wii virgin - perhaps the Wii sets up the correlation somehow? I've heard rumors of code in the Wiimote EEPROM, or there may be a flag - either of which may be modified by the Wii.

Just a couple of random ideas.
_________________
"I seldom let practicality get in the way of my fascination with shiny things and blinky lights."
- some guy
http://abstrakraft.org/cwiid