Trying to change temperature of a thermostat by +-0.1
Define variable -> Yay '{}', so helpful.
Vs: "Read value from entity/attribute", like exactly how it is done during triggers/condition evaluation... but store to a value? Nope. Only permitted if you drop down to C.
Set helpers -> Only to set values, never /from/ something??
Many programmers like variables/registers, and ability to modify them.... Why the nice UI basically forbids that is beyond strange.
A time trigger that runs, if temp above a value, to decrease that value gradually... is apparently too complex before entering Lambda pro-mode??