Dimmer and MQTT: No percent state

I admit that I have zero practical experience with Dimmers and Sliders.

Without out knowing the “proper” way, I would probably use a Proxy Item.

Create an Item that is not bound to anything (i.e. has no { } clause). Put this Item on your sitemap.

Add back in your Rule only this time when the Proxy Item receives INCREASE, sendCommand the number to LED15.

I wrote up a short tutorial on Proxy Items here: