LIEBERT-ESP2(8)
===============

NAME
----

liebert-esp2 - Driver for Liebert UPS, using the ESP-II serial protocol

SYNOPSIS
--------

*liebert-esp2* -h

*liebert-esp2* -a 'UPS_NAME' ['OPTIONS']

NOTE: This man page only documents the hardware-specific features of the
liebert-esp2 driver.  For information about the core driver, see
linkman:nutupsdrv[8].

SPECIAL CABLING NOTE
--------------------

Be aware that an RS-232 cable with ONLY the RX, TX and ground pin
must be used when interfacing with GXT2 series UPS units (and possibly
others), since the handshaking lines are used for purposes other than
RS-232 flow control.

Use of a standard RS-232 cable with full handshaking may result in
undesired operation and/or shutdown. It is therefore advisable to confirm
the proper cable/wiring with the diagram provided in the manual with your
UPS.

SUPPORTED HARDWARE
------------------

Tested to work on the following units:

* Liebert GXT2-6000RT208

This is an experimental driver.  You have been warned.

This driver currently does not support modification of configuration
parameters, such as the low battery warning time and automatic restart
policy.

EXTRA ARGUMENTS
---------------

This driver supports the following optional settings in linkman:ups.conf[5]:

*baudrate=*'num'::
Set the speed of the serial connection -- 1200, 2400 (default), 4800, 9600
or 19200.

AUTHORS
-------

* Richard Gregory <R.Gregory at liverpool.ac.uk>
* Arjen de Korte <adkorte-guest at alioth.debian.org>
* Nash Kaminski <nashkaminski at kaminski.io>

SEE ALSO
--------

The core driver:
~~~~~~~~~~~~~~~~

linkman:nutupsdrv[8]

Internet resources:
~~~~~~~~~~~~~~~~~~~

The NUT (Network UPS Tools) home page: https://www.networkupstools.org/
