Creating sensor for speed, convert to km/h

[bartowski1182]

With the new change to the MQTT integration to convert to mph, what's the best way for me to set up a sensor that will convert it back to km/h for me?

this is the template I'm currently using doesn't seem to be working correctly:

• sensor:
  • name: "Tesla Speed"
    device_class: speed
    unit_of_measurement: "km/h"
    state: >
    {% if state_attr('device_tracker.thunderfury_location_tracker', 'speed') == None %}
    0
    {% else %}
    {{ state_attr('device_tracker.thunderfury_location_tracker', 'speed') | float * 1.609 | round(0) }}
    {% endif %}

it's displaying speeds far above what the car is actually driving (as I watch it in both the Tesla app and in TeslaMate), 99 km/h is being converted to 124 km/h

[bartowski1182]

Apparently my MQTT broker wasn't running, so it's possible the integration just happened to pull when the speed spiked and i didn't realize, will monitor it and update. Still interested in whether or not this sensor is the best way to do it

[bartowski1182]

Okay so I was stupid, and writing it this way causes 1.609 to be rounded up to 2

the actual way to write it is with an extra bracket:
{{ (state_attr('device_tracker.thunderfury_location_tracker', 'speed') | float * 1.609) | round }}

closing as solution

[alandtse]

Glad to see you resolved it. The wiki may be a good place to reference this discussion if you're willing to update it.