Prusa LGTM: Prusa looks good to me

This helps monitor your Prusa printer by taking regular screenshots and storing them in Loki. This lets you visualise your prints in Grafana.

Getting Started

Prerequisites

A Linux Machine
WebCam pointing at your printer
Ability to send logs to Loki (see: https://grafana.com/docs/loki/latest/send-data/)
(optional) Your linux user that is part of the video group. If not, run it with sudo.

Install

Please find the right binary for your device here: https://github.com/gouthamve/prusaLGTM/releases/latest

Running PrusaLGTM to monitor your printer

./prusaLGTM print-image

This should now start logging the image to stdout.

Commands

print-image

Usage: prusaLGTM print-image [flags]

Print images from a camera to stdout.

Flags:
  -h, --help                           Show context-sensitive help.
      --prometheus-port=8366           The port to expose Prometheus metrics on.

      --max-log-size=256000            Maximum bytes of the image to be logged. Set it to lower than Loki log line limit
      --max-image-size=1080            Maximum size of the image to be logged in pixels.
      --prusa-link-url=                The URL to PrusaLink. When provided we only log images when there is a print job ongoing.
      --ml-api-url=STRING              EXPERIMENTAL: The URL to the ML API to detect failures.
      --camera-device="/dev/video0"    The video device to use.
      --format=FORMAT
      --camera-frame-width=2304        The width of the frame.
      --camera-frame-height=1536       The height of the frame.
      --camera-frame-rate=2.0          The frame rate of the camera.
      --camera-picture-interval=10s    The interval at which to take pictures.

generate-timelapse

Usage: prusaLGTM generate-timelapse --loki-url=STRING --start-time=TIME --end-time=TIME [flags]

Generate a timelapse video from the print images.

Flags:
  -h, --help                                                        Show context-sensitive help.
      --prometheus-port=8366                                        The port to expose Prometheus metrics on.

      --loki-url=STRING                                             The URL to the Loki API to fetch logs from.
      --loki-username=STRING                                        The username to authenticate with the Loki API.
      --loki-password=STRING                                        The password to authenticate with the Loki API.
      --logql-query="{unit=\"prusaLGTM.service\"} |= \"base64\""    The LogQL query to fetch logs.
      --start-time=TIME                                             The start time of the logs to fetch.
      --end-time=TIME                                               The end time of the logs to fetch.
      --encode-to-mp4                                               Whether to encode the timelapse to MP4. Requires ffmpeg
      --output-path="videos/"                                       The path to save the timelapse video.