Assuming that value is a string and not a datetime object you can slice it like this:
"{{ states('sensor.waschmaschine_remaining_time')[0:5] }}"
Note this does not round the seconds, it just truncates them. So 10:10:59 → 10:10, not 10:11.
Assuming that value is a string and not a datetime object you can slice it like this:
"{{ states('sensor.waschmaschine_remaining_time')[0:5] }}"
Note this does not round the seconds, it just truncates them. So 10:10:59 → 10:10, not 10:11.