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

layout, title, description, date, sidebar, comments, sharing, footer, logo, ha_category, ha_iot_class, ha_release, ha_qa_scale, redirect_from

layout	title	description	date	sidebar	comments	sharing	footer	logo	ha_category	ha_iot_class	ha_release	ha_qa_scale	redirect_from
page	Min/max Sensor	Instructions on how to integrate min/max sensors into Home Assistant.	2016-10-13 12:00	true	false	true	true	home-assistant.png	Utility	Local Polling	0.31	internal	/components/sensor.min_max/

The min_max sensor platform consumes the state from other sensors to determine the minimum, maximum, latest (last) and the mean of the collected states. The sensor will always show you the lowest/highest/latest value which was received from all monitored sensors. If you have spikes in your values, it's recommended to filter/equalize your values with a statistics sensor first.

This sensor is an alternative to the template sensor's value_template: to get the average of multiple sensors.

{% raw %}

{{ ((float(states.sensor.kitchen_temperature.state) +
     float(states.sensor.living_room_temperature.state) +
     float(states.sensor.office_temperature.state)) / 3) | round(2)
}}

{% endraw %}

Sensors with an unknown state will be ignored in the calculation. If the unit of measurement of the sensors differs, the min_max sensor will go to an error state where the value is UNKNOWN and unit of measurement is ERR.

{% linkable_title Configuration %}

To enable the min_max sensor, add the following lines to your configuration.yaml:

# Example configuration.yaml entry
sensor:
  - platform: min_max
    entity_ids:
      - sensor.kitchen_temperature
      - sensor.living_room_temperature
      - sensor.office_temperature

{% configuration %} entity_ids: description: At least two entities to monitor. The unit of measurement of the first entry will be the one that's used. All entities must use the same unit of measurement. required: true type: [list, string] type: description: "The type of sensor: min, max, last or mean." required: false default: max type: string name: description: Name of the sensor to use in the frontend. required: false type: string round_digits: description: Round mean value to specified number of digits. required: false type: integer default: 2 {% endconfiguration %}