This OctoPrint plugin implements a shutdown physical button for the Raspberry Pi. It offers also a status LED to know when OctoPrint is ready and a buzzer to signal the startup and the shutdown. Remember that these signals may vary of few seconds.
By default, this plugin shuts down the Raspberry without checking of there are ongoing jobs. In settings, there is a flag to disable the button when printing.
To shut down the Raspberry, it uses the command configured in OctoPrint settings.
This plugin supports both active and passive buzzers. By default, it assumes to have an active one.
Install via the bundled Plugin Manager or manually using this URL:
https://github.com/danieleborgo/OctoPrint-ShutdownButtonLEDBuzzer/archive/master.zip
The circuit hereafter exposed is just the one set by default, since the plugin allows to edit each of these pin:
- Button: by default directly on pin GPIO26
- LED: by default on pin GPIO6
- Buzzer: by default on pin GPIO13
In case one of these features is not needed, it can be deactivated by the apposite settings section.
Always remember to properly check each connection, using the official datasheet, before turning on the Raspberry.
This plugin offers several configuration parameters, accessible in the apposite OctoPrint section in setting:
There are KiCad PCB files available in case you want to make your own PCB. A bill of materials (BOM) can be found in the according folder.
There is no a precise resistor needed, since it depends on how much light is needed. Despite this, it is suggested to use a value at least of few thousands of ohms. Always remember to check the connections and the datasheet.
The plugin supports both active that passive buzzer, but it is necessary to configure them by the settings panel.
A 5 mm LED is a good option, and it is usually in Arduino kits. In case a different one is attached, check that the current it needs is lower than the one a Raspberry pin can give.
This software is distributed on GPLv3.0, more information available in LICENSE.md.