hub2prom

This is a bridge between Hubitat and Prometheus. It scrapes device information and status from a Hubitat using the Maker API, and exports it in a Prometheus-compatible format.

Setup

First, enable the Maker API on your Hubitat. This involves adding a built-in app called "Maker API". From its configuration, you probably want to "Allow Access via Local IP Address" so that hub2prom can use it. Then select the devices whose information you want exported through the Maker API; every selected device with attributes (sensor values) will be exported through hub2prom.

Next, create a hub2prom.yaml file that looks like this:

maker_api: http://1.2.3.4/apps/api/3/devices
access_token: 123abc-4567-8902-cafed00d

metrics:
  - temperature
  - humidity
  - battery
  - illuminance
  - motion
  - contact

The maker_api address should be the prefix of the URLs that the Maker API gives as examples (up to and including the /devices path component). The access_token value should be what it is reporting too.

metrics is a list of the attributes that you care about. The full list above is supported, but you can reduce the list if you want to be more selective. Each will be the name of a Prometheus gauge metric exported by hub2prom, including name, label and room metric labels.

Run hub2prom as you see fit (e.g. using systemd), using its -port flag to specify a HTTP port for it to listen on.

Finally, configure Prometheus to scrape the aforementioned HTTP port with the standard /metrics path. Each scrape will cause hub2prom to fetch all the device information from the Maker API.

Debugging

If metrics don't seem to be flowing, use the /debug/requests endpoint on hub2prom in the browser to see its traces for each hit of the /metrics endpoint.