Simple prometheus exporter for getting data from Hello Sense devices into prometheus.

If you have a working Go installation, getting the binary should be as simple as

go get github.com/xperimental/hello-exporter

There is also a build-arm.sh script if you want to run the exporter on an ARMv7 device.

$ hello-exporter --help
Usage of hello-exporter:
  -a, --addr string       Address to listen on. (default ":9258")
  -p, --password string   Password of Hello account.
  -u, --username string   Username of Hello account.

After starting the server will offer the metrics on the /metrics endpoint, which can be used as a target for prometheus.

The exporter will query the Hello API every time it is scraped by prometheus. It does not make sense to scrape the Hello API with a small interval as the sensors only update their data every few minutes, so don't forget to set a slower scrape interval for this exporter:

scrape_configs:
  - job_name: 'hello'
    scrape_interval: 90s
    static_configs:
      - targets: ['localhost:9258']

I did not do the reverse engineering of the API myself. Instead I read some nice blog articles about it and based my implementation on them. Although I have read other ones the one by Chris Smith is the one I read while doing the implementation.