[Nut-upsuser] Unitek iZi UPS 525

[Ciprian Vizitiu]

Hi everybody,
 
I've got an Unitek iZi UPS 525 with a serial interface. The supplied cable
looks fairly simple: RX->RX , TX->TX and GND->GND. Using this cable and
Minicom with 2400 8N1 I'm able to issue commands to the UPS using the
"Megatec Protocol" http://www.networkupstools.org/protocols/megatec.html so
I know the UPS is fairly "intelligent" :-) and the serial connection works. 
 
Questions: 
 
1. Which cable should I use for "Megatec Protocol"? Yes, I've read the
aforementioned document but the hardware spec they give there doesn't look
OK to me: e.g. "RX   <----------   TX  (pin 9)"... Pin 9 is supposed to be
RI, or not? :-|

2. Which driver should I use for "Megatec Protocol"? The only Megatec
references (in "UPS features and support"
http://www.networkupstools.org/compat/stable.html) are for "genericups
upstype=21". Trouble is, "genericups" looks more like an enclosure type of
driver rather than a smart one. It starts OK but OL and LB are always ON, no
wonder since the cable has only three wires. :-|

Any hints? 

PS. As per "UPS features and support" I've also tried "fentonups", just to
be on the safe side although to me "fenton" looks more like a simple ON/OFF
signaling rather than a complex serial protocol. 

PPS. Yes, the UPS has "Linux" written on the box and they do provide some
kind of daemon, it's just that it requires JRE and X! =:-o