softener-monitoring

Monitor power usage for my water softener, alert when it cycles. This is mostly notes and tinkering.

Components

Hardware:

Water Softener
TP-Link HS110 WiFi Smart Plug

Software:

InfluxDB: Holds power consumption time series data.
https://github.com/plasticrake/tplink-smarthome-api: Lets us scrape energy metrics from the HS110 plug. The included Kasa app doesn't provide enough granularity to identify when a water softener cycles. We need more granularity and flexibility in reporting.
Flask: Run a small API that can receive InfluxDB alerts and send email notifications via SendGrid.

Deploying

Run InfluxDB on its own, set up:
- Org and bucket
- Access token with permission to write to a bucket
Create config and secret entries referenced in docker-compose.yml
docker stack deploy -c docker-compose.yml softener
In InfluxDB, set up:
- Monitoring dashboard
- Threshold and Deadman Checks
- Notification endpoint targeting the Flask endpoint
- Alerting rules based on power metrics:
  - Ok (Idle): 700mW - 1W
  - Info (Running): >1W
  - Warn (Low Draw): <700mW
  - Crit: From deadman check