Changing the sign of a number coming from a thing channel

[jimtng]

@LoryB

Nope. Still the same issue: if I enable the ECMAScript as profile the channel stops updating my power, no metter what I write on it.

I can confirm this.

I’m not familiar with JS Scripting, I suspect there’s a syntax issue there.

If you tried using JRuby scripting (have to install the addon first), you can try this:
|QuantityType.new(input) * -1 - I tried this and it worked.

@LoryB

It stops updating also if the field is empty and that sounds weird.

Having both fields empty will result in nothing getting updated indeed.