PortRetry retries the serial connection on a configurable interval when the printer disconnects

When the printer is disconnected, this plugin will try to reconnect the printer on a configurable interval

Comes in handy when running octoprint in an lxc, and the port device is available even if the printer is not connected.

Should also work to solve the issue with Prusa printers that don’t remove the serial port from the system when powering down

Caveats: only tested on OctoPrint 1.10.2, python 3 and on linux

Configuration

In ~/.octoprint/config.yaml, the interval can be configured to something other than the default 5 seconds. There is also a settings page in the webui

plugins:
  portretry:
    interval: 5

This plugin will do nothing if the serial port in Serial Connection > General is set to AUTO, you will need to specify a port there for this plugin to work! Or in ~/.octoprint/config.yaml:

serial:
  port: /dev/ttyUSB0

When you change the port from AUTO to something else, you will need to connect to the printer manually first (or restart the server).