Min_Max

Min and Max entities

The entity_min and entity_max options are here to display the maximum and minimum values that your entity reached in the past during a defined period. The card will not compute this magically, you must define some entities yourself in Home Assistant.

You can track either the state of an entity with :

entity_min: sensor.your_min_sensor
entity_max: sensor.your_max_sensor

or you can track an attibute of an entity with (this is handy if you use statistics sensor):

entity_min: sensor.your_sensor.attribute_min
entity_max: sensor.your_sensor.attribute_max

To create such min and max sensor(s) several methods are possible, here are few examples.

Home Assistant Statiscts Sensor

You can use the statistics sensor of Home Assistant.

InfluxDB Sensors

If you store states in an InfluxDB database (you should ! 😝 ) you can create InfluxDB sensors to get the min and max on a give period of time.

Example : In this example entity name is pressure, the state is stored in valuefield, the database name is hassio and we want the min and max on the current week.

This will create a max_pressure_this_week sensor with the maximum pressure value that we hit this week.

  - name: max pressure this week
    unit_of_measurement: mbar
    measurement: '"mbar"'
    group_function: max
    where: '"entity_id" = ''pressure'' AND time > {{(as_timestamp(now()) - (now().weekday() * 86400) - (now().hour * 3600) - (now().minute * 60) - (now().second)) | round(0)}}s'
    field: value
    database: hassio

This will create a min_pressure_this_week sensor with the minimum pressure value that we hit this week.

  - name: min pressure this week
    unit_of_measurement: mbar
    measurement: '"mbar"'
    group_function: min
    where: '"entity_id" = ''pressure'' AND time > {{(as_timestamp(now()) - (now().weekday() * 86400) - (now().hour * 3600) - (now().minute * 60) - (now().second)) | round(0)}}s'
    field: value
    database: hassio

Just be sure to put these config lines in the correct section of your configuration !

- sensor:
  - platform: influxdb
    host: <your_influxdb_host>
    queries: