I started testing my power control system - its got EIA-232 (serial) and ethernet connections. I plan on controlling some systems via a laptop which will control lights, pumps, reactors, etc. Perhaps handle power outage situations by turning off lights and leaving just circulation pumps on... someday.
after a couple of hours wasted trying to get the serial connection up I found my problem - it uses some strange pinout on the serial to rj45 (specs
Here)
I'll grab a crimper tomorrow and fabricate this adaptor instead of paying $9 + SH.