NAME

       upsrw - UPS variable administration tool

SYNOPSIS

       upsrw ups

       upsrw -h

       upsrw -s variable [-u username] [-p password] ups

DESCRIPTION

       upsrw allows you to view and change the read/write variables inside your UPS. It sends commands via the
       server upsd(8) to your driver, which configures the hardware for you.

       The list of variables that allow you to change their values is based on the capabilities of your UPS
       equipment. Not all models support this feature. Typically, cheaper hardware does not support any of them.
       Run upsrw with a UPS identifier to see what will work for you.

OPTIONS

       -h
           Display the help message.

       -s variable
           Specify the variable to be changed inside the UPS. For unattended mode such as in shell scripts, use
           the format VAR=VALUE to specify both the variable and the value, for example:

               -s input.transfer.high=129

           Without this argument, upsrw will just display the list of the variables and their possible values.

           Some variables are strings, and can be set to any value within the length limit. Others are
           enumerated types and can only be set to one of those values. Others may be within an allowed range of
           values. Refer to the list to know what’s available in your hardware.

       -u username
           Set the NUT username for the connection to the server. This is optional, and you will be prompted for
           this when using the -s option if you don’t specify -u on the command line. NUT usernames are defined
           in upsd.users(5), and are not linked to system usernames.

       -p password
           Set the password to authenticate to the server. This is also optional like -u, and you will be
           prompted for it if necessary.

       ups
           View or change the settings on this UPS. The format for this option is upsname[@hostname[:port]]. The
           default hostname is "localhost".

UNATTENDED MODE

       If you run this program inside a shell script or similar to set variables, you will need to specify all
       of the information on the command line. This means using -s VAR=VALUE, -u and -p. Otherwise it will put
       up a prompt and your program will hang.

       This is not necessary when displaying the list, as the username and password are not required for
       read-only mode.

       Moreover, if you run this program inside a shell script or similar, you should only consider using output
       from stdout, not stderr.

DIAGNOSTICS

       upsrw can’t set variables on your UPS unless you provide a valid username and password. If you get
       "access denied" errors, make sure that your upsd.users(5) has an entry for you, and that the username you
       are using has permissions to SET variables.

VALUE FORMAT

       When using upsrw to modify a numeric float value, that values must be given using decimal (base 10)
       english-based representation, so using a dot, in non-scientific notation. So hexadecimal, exponents, and
       comma for thousands separator are forbiden. For example: "1200.20" is valid, while "1,200.20" and
       "1200,20" are invalid.

HISTORY

       This program used to be called upsct2, which was ambiguous and confusing.

SEE ALSO

       upsd(8), upscmd(8)

   Internet resources:
       The NUT (Network UPS Tools) home page: http://www.networkupstools.org/

Network UPS Tools 2.7.3.                           03/09/2016                                           UPSRW(8)