- √ - could someone please explain eval and eval_trigger?

[Rasmus7700]

Hello Guys..
The eval and eval_trigger doesn't make any sense for me, i'm very confused after reading around in the doc and at this forum - seems like many different ways to do it, but i can't see the logic in it....

All i wanna do is eval on a bool. If the bool goes high it must turn on light, if bool goes low it must turn off the light..... I'm trying this:

        [[[floor_on_off]]]
        type=bool
        visu_acl=rw
        knx_dpt=1
        knx_listen=2/0/0
        knx_send=2/0/0
        knx_init=2/0/0
        eval = true if sh.garage.light.constant_floor else None
        eval_trigger = garage.light.constant_floor

The eval is a bit that comes from a pushbutton to override presence sensors...

When this one get's high it must turn on the object "Floor_on_off"

Could someone please write the correct expression - so it can make sense for me

[Rasmus7700]

Okay, finally i've found it...
The only problem was that false must be False and true must be True....

I'm leaving this thread - maybe other could look in it later and see.... This one works now

[JuMi2006]

You are really near a solution:

eval = true if not sh.garage.light.constant_floor() else false

In eval you have to use sh.foo.bar() to get the value of foo.bar item.
In eval_trigger you have to use the item foo.bar without sh.