> For the complete documentation index, see [llms.txt](https://mwx.twelite.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mwx.twelite.info/latest_en/api-reference/sys_callbacks/init_coldboot.md).

# init\_coldboot()

{% hint style="danger" %}
Usually not used.
{% endhint %}

Called at the re-initialization of code execution, with no peripheral API or initialization.

{% hint style="info" %}
This callback function definition is optional.
{% endhint %}