mqtt-presence-checker

Check if you (or your phone) is at home and notify your smarthome via mqtt. You can configure this daemon via a toml file in /etc/mqtt-presence-checker/mqtt-presence-checker.conf.

/etc/mqtt-presence-checker/mqtt-presence-checker.conf:

[main]
cooldown = 10
log = "/var/log/mqtt-presence-checker.log"

[mqtt]
host = "mqtt.example.org"
username = "<username>"
password = "<password>"
topic = "presence-checker/presence"

[mqtt.sensor.door-sensor]
topic = "zigbee2mqtt/door_sensor"
predicate = "lambda x: not x['contact']"

[ping]
hosts = [
    'alice.example.org',
    'bob.example.org'
]

This is rather rudimentary and might crash or behave strange. Feel free to fork me on github and send a PR if you find any bug!

Install with docker

Run with docker:

docker run \
    --cap-add net_raw \
    --cap-add net_admin \
    --name mqtt-presence-checker  \
    --restart unless-stopped \
    -v /etc/mqtt-presence-checker/:/etc/mqtt-presence-checker/ \
    --label io.containers.autoupdate=registry \
    -d docker.io/rincewindwizzard/mqtt-presence-checker:latest

You can also configure systemd to create the containers using

$ podman generate systemd --restart-policy=always --new -n -t 1 mqtt-presence-checker > /etc/systemd/system/container-mqtt-presence-checker.service
$ systemctl enable container-mqtt-presence-checker.service

Which results in the following systemd unit:

# container-mqtt-presence-checker.service
# autogenerated by Podman 3.4.4
# Sat Oct 29 17:08:56 UTC 2022

[Unit]
Description=Podman container-mqtt-presence-checker.service
Documentation=man:podman-generate-systemd(1)
Wants=network-online.target
After=network-online.target
RequiresMountsFor=%t/containers

[Service]
Environment=PODMAN_SYSTEMD_UNIT=%n
Restart=always
TimeoutStopSec=61
ExecStartPre=/bin/rm -f %t/%n.ctr-id
ExecStart=/usr/bin/podman run --cidfile=%t/%n.ctr-id --cgroups=no-conmon --rm --sdnotify=conmon --replace --cap-add net_raw --cap-add net_admin --name mqtt-presence-checker -v /etc/mqtt-presence-checker/:/etc/mqtt-presence-checker/ --label io.containers.autoupdate=registry -d docker.io/rincewindwizzard/mqtt-presence-checker:latest
ExecStop=/usr/bin/podman stop --ignore --cidfile=%t/%n.ctr-id
ExecStopPost=/usr/bin/podman rm -f --ignore --cidfile=%t/%n.ctr-id
Type=notify
NotifyAccess=all

[Install]
WantedBy=default.target

Now everytime

$ podman auto-update

is called, the latest container image is redeployed.