Add indication for humidifier empty

[asportnoy]

I have a DR-HHM003S humidifier. Is it possible to add indications for when the tank is out of water? I'm thinking a binary sensor (or another type of sensor depending on the data provided) to indicate that there is water in the tank, and maybe also making the device unavailable when it runs out.

The official app does show a message if the water is empty, so theoretically your API should have that info too. I'm attaching diagnostics from HA, one when the water tank is empty and one just after I refilled it (named accordingly). Hopefully that is enough to figure out what you need, but lmk if not.

empty.json
full.json