Thanks! Yes the offset is what I meant the values for open / close (on off) don’t need to be the same. I forgot to explain the reason why you might want that… 
Also no sure if OP (michiel) is on Homey 1.5 or 2.x
I took leap of faith and am on 2.x now. But what I am doing should work on 1.5, I think even better because using tags combined with other data as value is a pain in the ass on 2.x you cannot edit the field freely only delete / add on the end and the edit field is way to small (try putting in some longer json string for example…)
