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How to push lot availability to road signs and Home Assistant with Lotvulture

Send capacity and space changes over MQTT to LED signage or Home Assistant automations.

Who it is forA lot operator or smart-building integrator who has LED road signs or a Home Assistant setup and needs live availability to drive them.

The problemSigns and automations cannot show lot availability without a live data source that reports capacity changes.

The outcomeMQTT messages fire on capacity thresholds or single-space transitions, and staff get notified when capacity hits a set level such as 95%.

What you need first

  • One or more IP, RTSP, or snapshot-capable cameras with a reachable stream URL or snapshot endpoint
  • A Windows PC for the native installer, or a Linux host with Docker for the container
  • Access to the Releases page or the ghcr.io container image
  • A Developer Cloud API key from lotvulture.com, only if using the cloud API use case

Steps

  1. Complete the dashboard setup and confirm occupancy states appear on the live dashboard.
  2. Open the alerting subsystem in the dashboard and create an MQTT alert.
  3. Set the trigger to a lot capacity threshold, such as 95%, or to single space transitions.
  4. Point the MQTT alert at your broker and topic that the sign or Home Assistant reads.
  5. Trigger a test change by occupying or freeing a mapped space and confirm the message arrives.

Prompt for your agent

For the repo lotvulture/lotvulture, configure an MQTT alert in the Lot Vulture dashboard that fires when lot capacity reaches 95 percent, targeting the broker at <mqtt_broker_address> and topic <topic_name>. Report the alert configuration you created and the message payload received, and verify that a test occupancy change produces exactly one message on the topic.

Caveat. The README does not document the exact MQTT payload format or the alert setup menu, so check the dashboard and the Developer Guide before wiring it to a sign.

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