One of the drawbacks of using OctoPrint in the default Docker Container is that the printer must be connected and operational for the container to start. This issue can affect the operation of useful plugins like PSU Control.

Fortunately there is a way to enable serial device hot plugging in a Docker container. It is practical if you are running few printers/containers.

The following instructions were written for 3D printers but the logic could be applied to any serial device and any type of container (HomeAssistant, Zigbee2MQTT, etc...).

ESP32 + ESPHome Open Source Energy Monitor

Introduction

For months I've been looking for a non-intrusive energy monitoring solution for my home. The residence receives more than one phase from the utility company and the available solutions in the market based on open protocols are extremely expensive for this setup.