[Nut-upsdev] patch for support Liebert GXT2 ESP2 protocol

[Richard Gregory]

Hi All,

Attached is a patch against nut-2.4.1 that adds a driver for the ESP2 
protocol, as used by the serial port found on the Liebert GXT2.

This driver is mostly based on:
http://www.csc.liv.ac.uk/~greg/projects/liebertserial
with additional bit field information from Spiros Ioannou.

liebert.c at the above url has been tested by a few people to return the 
correct status data.

Besides me, this driver (which is based on liebert.c) has been tested by 
one other. I've not yet had confirmation of the OB LB flags, my GXT2 is 
in a production setup.


Richard

+--                               --+
|  Biological Sciences, Room 231    |
|  http://www.csc.liv.ac.uk/~greg   |
+--                               --+
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