home-assistant.io/source/_components/binary_sensor.markdown

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layout	title	description	date	sidebar	comments	sharing	footer
page	Binary Sensor	Instructions how to setup your binary sensors with Home Assistant.	2015-11-20 14:00	true	false	true	true

Binary sensors are gathering information about state of switches, contacts, pins, and alike. The return value of those sensors is usually digital (1/0). This means that those sensors knows only two states: off/low/open and on/high/closed.

Knowing that there are only two states allows Home Assistant to represent the sensor better in the frontend.

For analog sensors please check the component overview.