A fork of this addon, which will continue to get updates, can be found at: https://github.com/createcandle/followers-addon

Allow properties to follow each other's changes, live. For example, you could:

• Have multiple lightbulbs change brightness by following closely how one lightbulb changes brightness.
• A volume control knob could be linked to the brightness of a lamp. The higher the volume, the brighter the lightbulb.
• A lightbulb's brightness could correspond with the current level of air pollution.

You can also do a reverse follow, where one value rises as another one lowers. For example:

• A lightbulb could respond to how much sunlight another sensor has detected. As the sun goes down, your light can automatically increase in brightness.