How did you reverse engineer this?

[ghost]

Fan speed would be the most important part since the damn thing doesnt actually turn the fan on when it heats up like they claim, so i want to say im obliged to help out but where you got the commands from unless you used a bus pirate or dissasembly of the windows driver.. Anything you can say about it ?

[ka87]

The windows driver part is only a serial-usb driver. I figured out chip from the Windows driver name. Then I used usb sniffer program to figure out the communication. Fan speed and fan mode is done by a contributor, so I will do it soon. Probably during next week.

[ghost]

I started to write a cpsufanctl but I've been caught up with work and won't have the right accommodations for awhile. There wasn't much to it, but I thought maybe would be a good approach :)

It'll be interesting to see if you can turn up a fanctl before I have a chance because I'm pretty sure I was just stabbing in the dark (my guess was to try to write a value to the same location that the speed is read from?) I did find float_to_byte though I couldn't figure out how to use it (int exp?)

I really don't understand how you could grok this unless you can relate the design to something else. Regardless it's impressive code with or without fanctl :)

cmake should make it easier to port to osx and/or freebsd though I think you have to do some stuff with #ifndef but cmake makes it easier http://stackoverflow.com/questions/7900661/how-to-read-a-cmake-variable-in-c-source-code

[ghost]

might make more sense to send a pull request to https://github.com/groeck/lm-sensors/ also: https://github.com/audiohacked/OpenCorsairLink

https://wiki.archlinux.org/index.php/Fan_speed_control (lm_sensors provides a fancontrol)

[okias]

for lm-sensors, there has been this issue: lm-sensors/lm-sensors#5

[ka87]

Sorry, I really haven't got time for this right now, but if you have time to pull this code to lm-sensors, feel free to do it. If not, i'll try to do in the future.
p.s.: I merged fan speed control just now, thank you for contributing.
I'm really happy, that some of you using this utility.

[maxbleatvt]

@ka87 What kind of encoding scheme is this? I'd like to learn more about what encode_table[] and decode_table[] mean.

[Tuxdude]

Got this PSU (AX1200i) for my new build for a sweet deal of $300 compared to the regular selling price of $400-$450 for this unit. I am also interested in understanding how you came up with the encode and decode table data? Any information you could share on the reverse-engineering from the USB packet sniffer?

I plan to do something along those lines mostly, but would be still good to understand how you were able to do it :)