[Nut-upsdev] Liebert ESP II protocol

[kelsey hudson]

About 8 months ago there was some noise on the mailing list about ESP II 
protocol for UPStation GXT and similar Liebert models -- someone had at 
least decoded part of the protocol. Has any work at all been done to 
facilitate using these units with NUT?

I came upon, for free, a GXT 1500 and external battery pack. This unit 
is colossal: on-line protection and a great runtime to boot. But enough 
bragging about the hardware. I'd like to put it into service, but I 
don't have a working piece of software to do so. I'm familiar with NUT 
and use it with an APC unit I have at home. It appears as though the 
contact closure part is supported with the 'liebert' driver. Fun. But, 
the ESP II part isn't, from what I gather. It'd be great to get it 
running. So, here's what I propose. I have this unit running and would 
be willing to use it for any testing while we develop the driver. As 
I've got the APC 2200 in production right now, I can hammer on this 
Liebert as long as I need to in order to get the driver up and running.

If others are interested in using my hardware for testing, I can whip 
something up real fast to hook into the UPS via serial to read/write the 
registers in the unit, and some sort of status indicator to see what's 
going on on the output. I already have a network-attached PDU that can 
be used to switch the input power to the UPS on and off at will.

If there's interest in this, please let me know.

Talk to you all later,
-Kelsey