Romeo – The Boondock Doorbell

I dedicate all my today's efforts to my grandma, who has her 90th birthday. ~Piotr 18.01.2020

Romeo listens to the LPD433 band where doorbells are commonly operating. When signal from the doorbell with desired ID is caught, he publish message under specified MQTT topic.

Configuration

Romeo is configured via the following environment variables:

• BELL_ID – identifier of the doorbell, returned by the rtl_433.
• MQTT_URL – MQTT URL of the topic in form in the form: mqtt(s)://[username[:password]@]host[:port]/topic.
• SLACK_API_TOKEN – Slack authorization token with chat:write:bot scope.
• SLACK_CHANNEL – Slack channel where the "Ding! Dong!" message should be posted.

Packaging

mkdir -p pkg/usr/bin/
mkdir -p pkg/lib/systemd/system/
mkdir -p pkg/DEBIAN

install -D *.sh pkg/usr/bin/
install -D *.service pkg/lib/systemd/system/

echo "\
Package: romeo
Version: $(git describe --tags)
Architecture: any
Depends: rtl-433, mosquitto-clients, curl
Description: $(head -n 1 README.md)
" > pkg/DEBIAN/control

dpkg-deb --build pkg
rm -r pkg

Deployment

Install pkg.deb and create /etc/romeo env like file and place configuration variables inside.

BELL_ID=123456789
MQTT_URL=mqtt://localhost/ding-dong
SLACK_API_TOKEN=xoxp-000000000-000000000000-000000000000-00000000000000000000000000000000
SLACK_CHANNEL=CXXXXXXXX

Lunch Romeo by enabling and starting his systemd services

systemctl enable romeo
systemctl enable romeo-slack
systemctl start romeo
systemctl start romeo-slack

Authors

• Piotr Majkrzak piotr@lamia.fi