NUT UPS for Home Assistant

configuration.yaml

sensor:
  - platform: nut
    username: upsmon
    password: secret
    resources:
    - ups.load
    - input.voltage
    - battery.charge
    - battery.runtime
  - platform: template
    sensors:  
      nut_ups_runtime_friendly:
        friendly_name: 'Time Remaining'
        value_template: >- 
          {% set time = (states.sensor.nut_ups_battery_runtime.state | int) | int %}
          {% set minutes = ((time % 3600) / 60) | int %}
          {% set hours = ((time % 86400) / 3600) | int %}
          {% set days = (time / 86400) | int %}
        
          {%- if time < 60 -%}
            Less than a minute
            {%- else -%}
            {%- if days > 0 -%}
              {{ days }}d
            {%- endif -%}
            {%- if hours > 0 -%}
              {%- if days > 0 -%}
                {{ ' ' }}
              {%- endif -%}
              {{ hours }}h
            {%- endif -%}
            {%- if minutes > 0 -%}
              {%- if days > 0 or hours > 0 -%}
                {{ ' ' }}
              {%- endif -%}
              {{ minutes }}m
            {%- endif -%}
          {%- endif -%}


automation:
  - id: no_electricity
    alias: No electricity
    trigger:
    - platform: numeric_state
      entity_id: sensor.nut_ups_input_voltage
      below: '120'
    action:
      service: notify.twilio
      data_template:
        message: 'Electricity is down. time remaining until newtworking shutdown: {{ states("sensor.nut_ups_runtime_friendly") }}'
        target:
          - '+972050000000000'

docker-compose.yaml

version: "3.1"
services:
  nutups:
    privileged: true
    restart: always
    build: nut-upsd
    ports:
      - 3493:3493
    volumes:
      - /dev/:/dev/

docker-entrypoint

#!/bin/sh -ex

if [ -z "$API_PASSWORD" ]
then
   API_PASSWORD=$(dd if=/dev/urandom bs=18 count=1 2>/dev/null | base64)
fi

if [ -z "$ADMIN_PASSWORD" ]
then
   ADMIN_PASSWORD=$(dd if=/dev/urandom bs=18 count=1 2>/dev/null | base64)
fi

cat >/etc/nut/ups.conf <<EOF
[$UPS_NAME]
	desc = "$UPS_DESC"
	driver = $UPS_DRIVER
	port = $UPS_PORT
	pollinterval = 15
EOF

cat >/etc/nut/upsd.conf <<EOF
LISTEN 0.0.0.0 3493
EOF

cat >/etc/nut/upsd.users <<EOF
[admin]
	password = $ADMIN_PASSWORD
	actions = set
	actions = fsd
	instcmds = all

[monitor]
	password = $API_PASSWORD
	upsmon master
EOF

cat >/etc/nut/upsmon.conf <<EOF
MONITOR $UPS_NAME@localhost 1 monitor $API_PASSWORD master
DEADTIME 25
MAXAGE 25
SHUTDOWNCMD "$SHUTDOWN_CMD"
EOF

chgrp -R nut /etc/nut /dev/bus/usb
chmod -R o-rwx /etc/nut

/usr/sbin/upsdrvctl start
/usr/sbin/upsd
exec /usr/sbin/upsmon -D

Dockerfile

FROM alpine:3.10

LABEL maintainer="docker@upshift.fr"

ENV NUT_VERSION 2.7.4

ENV UPS_NAME="ups"
ENV UPS_DESC="UPS"
ENV UPS_DRIVER="usbhid-ups"
ENV UPS_PORT="auto"

ENV API_PASSWORD=""
ENV ADMIN_PASSWORD=""

ENV SHUTDOWN_CMD="echo 'System shutdown not configured!'"

RUN set -ex; \
	# run dependencies
	apk add --no-cache \
		openssh-client \
		libusb-compat \
	; \
	# build dependencies
	apk add --no-cache --virtual .build-deps \
		libusb-compat-dev \
		build-base \
	; \
	# download and extract
	cd /tmp; \
	wget http://www.networkupstools.org/source/2.7/nut-$NUT_VERSION.tar.gz; \
	tar xfz nut-$NUT_VERSION.tar.gz; \
	cd nut-$NUT_VERSION \
	; \
	# build
	./configure \
		--prefix=/usr \
		--sysconfdir=/etc/nut \
		--disable-dependency-tracking \
		--enable-strip \
		--disable-static \
		--with-all=no \
		--with-usb=yes \
		--datadir=/usr/share/nut \
		--with-drvpath=/usr/share/nut \
		--with-statepath=/var/run/nut \
		--with-user=nut \
		--with-group=nut \
	; \
	# install
	make install \
	; \
	# create nut user
	adduser -D -h /var/run/nut nut; \
	chgrp -R nut /etc/nut; \
	chmod -R o-rwx /etc/nut; \
	install -d -m 750 -o nut -g nut /var/run/nut \
	; \
	# cleanup
	rm -rf /tmp/nut-$NUT_VERSION.tar.gz /tmp/nut-$NUT_VERSION; \
	apk del .build-deps

COPY src/docker-entrypoint /usr/local/bin/
ENTRYPOINT ["docker-entrypoint"]

WORKDIR /var/run/nut

EXPOSE 3493