mirror of
https://github.com/home-assistant/home-assistant.io.git
synced 2025-05-09 04:29:03 +00:00
49 lines
2.0 KiB
Markdown
49 lines
2.0 KiB
Markdown
---
|
|
layout: page
|
|
title: "Min/max Sensor"
|
|
description: "Instructions how to integrate min/max sensors into Home Assistant."
|
|
date: 2016-10-13 12:00
|
|
sidebar: true
|
|
comments: false
|
|
sharing: true
|
|
footer: true
|
|
logo: home-assistant.png
|
|
ha_category: Sensor
|
|
ha_iot_class: "Local Polling"
|
|
ha_release: "0.31"
|
|
---
|
|
|
|
|
|
The `min_max` sensor platform is consuming the state from other sensors and determine the minimum, maximum, and the mean of the collected states. The sensor will always show you the highest/lowest value which was received from your all monitored sensors. If you have spikes in your values, it's recommended filter/equalize your values with a [statistics sensor](/components/sensor.statistics/) first.
|
|
|
|
It's an alternative to the [template sensor](/components/sensor.template/)'s `value_template:` to get the average of multiple sensors.
|
|
|
|
```yaml
|
|
{% 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 the unit of measurement is `ERR`.
|
|
|
|
To enable the minimum/maximum sensor, add the following lines to your `configuration.yaml`:
|
|
|
|
```yaml
|
|
# Example configuration.yaml entry
|
|
sensor:
|
|
- platform: min_max
|
|
entity_ids:
|
|
- sensor.kitchen_temperature
|
|
- sensor.living_room_temperature
|
|
- sensor.office_temperature
|
|
```
|
|
|
|
Configuration variables:
|
|
|
|
- **entity_ids** (*Required*): 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.
|
|
- **type** (*Optional*): The type of sensor: `min`, `max` or `mean`. Defaults to `max`.
|
|
- **name** (*Optional*): Name of the sensor to use in the frontend.
|
|
- **round_digits** (*Optional*): Round mean value to specified number of digits. Defaults to 2.
|
|
|