I installed apcupsd and testing it I don't see any message being broadcasted via wall when I unplug the power.
setting:
UPSCABLE 940-0024C usb
UPSTYPE usb
DEVICE
POLLTIME 30
LOCKFILE /run/apcupsd
SCRIPTDIR /etc/apcupsd
PWRFAILDIR /etc/apcupsd
NOLOGINDIR /etc
ONBATTERYDELAY 10
BATTERYLEVEL 10
MINUTES 5
TIMEOUT 0
ANNOY 45
ANNOYDELAY 90
NOLOGON disable
KILLDELAY 0
NETSERVER on
NISIP 127.0.0.1
NISPORT 3551
EVENTSFILE /var/log/apcupsd.events
EVENTSFILEMAX 25
UPSCLASS standalone
UPSMODE disable
STATTIME 0
STATFILE /var/log/apcupsd.status
LOGSTATS off
DATATIME 0
--
Thelma
setting:
UPSCABLE 940-0024C usb
UPSTYPE usb
DEVICE
POLLTIME 30
LOCKFILE /run/apcupsd
SCRIPTDIR /etc/apcupsd
PWRFAILDIR /etc/apcupsd
NOLOGINDIR /etc
ONBATTERYDELAY 10
BATTERYLEVEL 10
MINUTES 5
TIMEOUT 0
ANNOY 45
ANNOYDELAY 90
NOLOGON disable
KILLDELAY 0
NETSERVER on
NISIP 127.0.0.1
NISPORT 3551
EVENTSFILE /var/log/apcupsd.events
EVENTSFILEMAX 25
UPSCLASS standalone
UPSMODE disable
STATTIME 0
STATFILE /var/log/apcupsd.status
LOGSTATS off
DATATIME 0
--
Thelma