Re: [Nut-upsuser] Low Battery False Alarms

Sun, 26 May 2019 06:24:37 -0700

Hi Roger,

Your previous reply got me thinking in this direction too, although I came up with a slightly different approach.  Thanks for the help and suggestion.  Below is what I came up with.

#!/bin/bash
#
# This script should be called by upssched via the CMDSCRIPT directive.
#
# Here is a quick example to show how to handle a bunch of possible
# timer names with the help of the case structure.
#
# This script may be replaced with another program without harm.
#
# The first argument passed to your CMDSCRIPT is the name of the timer
# from your AT lines.
OPTION="$1"
SCRIPT="$0"

function MyLogging () {
    echo "$1"
    logger -t $SCRIPT $1
}

function Shutdown () {
    MyLogging "NUT upssched \"lowbatt\" sequence start: UPS Low Battery; Begin shutting down clients"
    /etc/nut/scripts/shutdown-control &
    MyLogging "NUT upssched \"lowbatt\" sequence initiated"
}

MyLogging "Script called with arg $OPTION"

UPS_STATE=$(upsc myups1@localhost:3493 ups.status)
MyLogging "NUT upsmon UPS state: $UPS_STATE"

BAT_PERCENT=$(upsc myups1@localhost:3493 battery.charge)
MyLogging "NUT upsmon battery percent: $BAT_PERCENT"

case $OPTION in
    lowbatt)
        if [[ $UPS_STATE =~ "OL" ]]; then
            SLEEP_TIME=6
            MyLogging "NUT upsmon set \"lowbatt\" state and \"online\" state together - Perform extra checks before initiating shutdown"
            MyLogging "Sleep $SLEEP_TIME seconds and check UPS status again"
            sleep $SLEEP_TIME
            UPS_STATE_2=$(upsc myups1@localhost:3493 ups.status)
            MyLogging "NUT upsmon UPS state: $UPS_STATE_2"
            if [[ $UPS_STATE_2 =~ "LB" ]]; then
                Shutdown
            else
                MyLogging "\"LB\" not in UPS state string after retry - Not performing shutdown"
            fi
        else
            Shutdown
        fi
        ;;
    onbatt)
        MyLogging "UPS on battery"
        ;;
    online)
        MyLogging "UPS power restored and back online"
        ;;
    upsgone)
        MyLogging "The UPS has been gone for awhile"
        ;;
    *)
        MyLogging "Unrecognized arg: $OPTION"
        ;;
esac

exit 0

Thanks again!
-MikeD

Date: Sunday, May 26, 2019, at 02:26:31 AM PDT (GMT/UMT -0700)
From: Roger Price <[email protected]>
To: Nut Users <[email protected]>
Subject: Re: [Nut-upsuser] Low Battery False Alarms
On Sat, 25 May 2019, Mike Dillinger wrote:

How about something like this:

      case $OPTION in
          lowbatt)
                MSG="NUT upssched \"lowbatt\" confirmation begins. Waiting for 5 seconds"
                echo "$SCRIPT: $MSG"
                logger -t $SCRIPT "$MSG"
                Wait for 5 seconds
                CHARGE=$( upsc <myups> battery.charge )
                if CHARGE ok then exit from script
              MSG="NUT upssched \"lowbatt\" sequence start: UPS Low Battery; Begin shutting down clients"
              echo "$SCRIPT: $MSG"
              logger -t $SCRIPT "$MSG"
              /etc/nut/scripts/shutdown-control &
              MSG="NUT upssched \"lowbatt\" sequence initiated"
              echo "$SCRIPT: $MSG"
              logger -t $SCRIPT "$MSG"
              ;;
        ...
      esac
      exit 0

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