[Feature] Use a weight sensor to estimate filament left.

[buxtonpaul]

Describe the feature

Assuming the presence of a sensor in home assistant that represents the weight of the AMS-Lite. It should be possible to correlate this with the active_slot elements to provide an estimation of remaining filament on each spool.

What device is this for?

AMS Lite

Other Information

Thanks for this excellent add-on. As far as I am concerned this basically replaces the Handy app as we are on lan only mode!
I am not sure if the functionality described above would best fit in this add-on or if it should be in a separate component. It may all be doable directly in Home assistant with some clever scripting?
I think the interface would need to allow you to set the known weight of filament for a spool to allow you to reload partially used filaments, or depending how accurately things track it could just compute it, although things are sure to drift over time.

Adding a weight sensor looks like it could be pretty straightforward as the ESP-Home project supports them, so wiring up an ESP and a simple load sensor should be fairly doable.
Any feedback/thoughts welcome.