> For the complete documentation index, see [llms.txt](https://ask.simplehw.eu/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ask.simplehw.eu/kb/sensors/dry-switch.md).

# Dry switch

The SimpleIndustry can have external dry switches that can be connected to anything. The signal from the dry switches is then reported according to API 6. Reed on/off is the only mode that works with the dry switches.