Cat Scale Integration šŸ± ā€“ Monitor Catā€™s Health with a DIY weight sensors under litter box

Hi everyone,

Iā€™ve been working on a Home Assistant integration for a simple yet interesting idea: using weight sensors under your catā€™s litter box to track their weight and other metrics. I wanted to share it here in case anyone else finds it useful or has ideas to improve it.

The integration allows you to:

  • Detect when your cat enters and leaves the litter box.
  • Measure your catā€™s weight each time they visit.
  • Calculate the weight of any ā€œwasteā€ left behind.
  • Track baseline changes (e.g., litter added or removed).

This setup could help you monitor your catā€™s health over time or spot unusual behavior (like a decrease in visits or changes in weight). Itā€™s built as a custom sensor and works with any weight sensor that integrates with Home Assistant.

Itā€™s a bit WIP still though, any thoughts are welcomed
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This is such a great idea! Thanks for sharing this. Iā€™ve been thinking about doing something like this to track our catsā€™ litter box habits. We actually have two cats and two litter boxes, so it would be really helpful to support multiple cats by identifying which cat is using the litter box based on their weight (not too difficult for our cats who have quite different weights). And maybe a way to aggregate usage of multiple litter boxes.

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Amazing! I just had the idea to build something like this.

Will you add images of the hardware side?
I know it should be a modular integration but it would be nice to have an example

Nice, was just looking at something like this. This should work with an off-the-shelf smart scale that connects to HA? Iā€™m looking at buying a Xiaomiā€™s Mi-Scale 2 which seems to be well regarded for HA integration.