I’ve got a water softener which takes solid blocks of salt.
A use case I have is to be able to automate an alert to tell me it’s time to replace.
So as the salt block gets dissolved it gets lower and lower from the top of the unit.
What I want is to install an ultrasonic distance sensor which would integrate with HA to tell me “Water softener block nearly depleted”
In an ideal world it would be waterproof and battery powered.
Does anyone have any suggestions or recommendations?