Round() incorrect

Configuration
1

I want to convert the brightness 0-255 value to percentage but something weird is going on with the round function.

{% set brightness = (255 | int / 2.55 | round(0)) %}
{{ brightness }}

Result: 85
Cause everyone knows 255 / 2.55 = 85 :confused:

{% set brightness = (255 | int / 2.55 | round(1)) %}
{{ brightness }}

Result: 102

What is going on, how is something so basic not working like one would expect?

2

In jinja the pipes are applied first.

Your first one is rounding 2.55 to zero decimal points, which is 3

255 / 3 = 85

Your second one is rounding 2.55 to 1 decimal point, which is 2.5

255 / 2.5 = 102

The calculation is correct, your syntax is wrong if that is not the calculations you want to do.

1 Like
3

Iā€™m an idiot :dizzy_face:

{% set brightness = (255 | int / 2.55) | round(1) %}
{{ brightness }}

Somehow I can break my head over something and never find a solution. But the moment I post something I find the error.

1 Like