How to limt the numbers of characters?

Configuration
1

Hi,

ic create a Template sensor which calculate the wind speed from m/s in km/h. The result ist ok- but how can I limit the numbers of characters of the result? Sometimes the result looks like 8,989898923 km/h but I only need eg. 8,98 km/h.

- platform: template
  sensors:
    wind_einheit:
      value_template:
        '{{ states.sensor.dark_sky_wind_speed.state | multiply(3.6) }}'
      unit_of_measurement: 'Km/h'
2

You can create a template sensor and limit the number of decimal places, however it won’t always work.

HA seems to have an issue with this. I believe there is a bug request in related to temperature readings. Not sure if it applies to other readings.

3

Maybe using round(2). Taked from https://home-assistant.io/topics/templating/#sensor-states

    - platform: template
      sensors:
        wind_einheit:
          value_template:
            '{{ states.sensor.dark_sky_wind_speed.state | multiply(3.6) |round(2)}}'
          unit_of_measurement: 'Km/h'
4

Thank you! Round work for me!

5

Hi

sorry to open such an old thread, but it was the only one I found.

I do have kind of the same issue but in my case, it does not work

I use this:

value_template: '{{ states.vacuum.eva.attributes.total_cleaning_time | float / 60 | round(2) }}'

But it still gives me a number like x.xxxxxxxx but I only need it like x.xx
Also, If the number changes, there is still that long string.
I thought maybe one it will happen, but it seems like it does this all the time.

Anyone know where it could be related to?

6

You need to use brackets, otherwise 60 will be rounded before the division happens:

value_template: '{{ (states.vacuum.eva.attributes.total_cleaning_time | float / 60) | round(2) }}'
1 Like
7

Thanks, that was the trick.
Simple math, did not thought about this.