Mara X Monitoring

Capture temperature data from a Lelit Mara X espresso machine via a serial connection and persist in a database and expose via grafana.

Docker will persist DB storage using volumes so restarts won't cause data loss.

Tested on a Raspberry Pi (Raspberry Pi OS Stable - Debian 11 Bullseye).

All credit to the author of this post for doing so much of the ground work!

How to run

1. Start everything running

Run grafana / influxDB / ingestion via docker-compose with the following in a terminal

[sudo] docker-compose up --build

This can now be backgrounded (Ctrl-z)

2. View Graphs

• Visit http://localhost:3000 in a browser on the same machine to view grafana
  • Default username admin
  • Default password admin
  • You'll be prompted to change these
• Navigate to Dashboards -> Manage (http://localhost:3000/dashboards)
• Open Mara X folder and choose dashboard

3. Setup external access (Optional)

• Determine IP address of raspberry pi on your local network
  • Something like 192.168.1.160
  • Visit http://192.168.1.160:3000 via a browser

Alternatively, setup tailscale for access from outside your local network.

What do I need?

• Lelit Mara X PL62 espresso machine (link)
• Serial to USB cable (link)
• Computer capable of running linux / docker, like a raspberry pi (link)

Other

• Mara X logs cleared daily
• Influx DB retention policy set to 2 weeks, see here