I've heard of some using a serial to ethernet adapter and then using desktop PC to capture the data. Not sure how that works.
Indeed! Serial to Ethernet or wifi is a route, also, serial to bluetooth is a solution that seems to be working well also. There is also a serial to wifi to serial method, which simply sends the rs232 over the air to another rs232, so no fancy hacking required.
Eggplant from RC has blogged his solution to this issue here:
http://reef.pantshead.com/?p=383#more-383
Please do take a second to review the entry, he lays out his geek-fu very well, and this is an excellent way to understand the geek/hack side of things. You do not need to do this if you are using digital aquatics' MyReef software, but damn that man has skills.
These are all expensive solutions to the end result: keeping your PC hooked up to the rk2 at all times to log data. Thats all this connection is doing however, logging data like temp, timers (lights, wavemaker), PH, channel on/off, etc.
their new back end software adds some fun things like reef cams and such, that highlight the ability to keep a pc connected to your reef at all times. It also includes an integrated web server so you can view your RK2 remotely. Unfortunately, their PC software only runs on windows and is currently beta, but their RK2 firmware 2.4 is solid and I trust my reef to it.
As far as setup, the process is extremely simple and might take you 30-45 mins to setup including timers and conditions for lights, heaters, fans, skimmer/pump standby, and wave timers if you need them
I am EXTREMELY pleased with the rk2, I have had 0 issues, and my tank has never been so stable (temp, ph, timers). I plan on hooking up a PC for data logging and reef cam action soon, it will consist of:
Old PII 500mhz proc
256mb ram
10gb HD
windows 2000 w/myreef software
pci wifi card (wpa/tkip)
The whole solution should run about 100$ if you need to buy the pc parts and the wifi card. Luckily, I have this kind of crap laying around, its my other hobby
Sorry again for slacking on this so long, I totally forgot!