Plant133 is a simple indoor plant-watering device. Its job is to keep a houseplant happy by watering it: keeping the soil moisture level between some minimum and maximum amount. I first posted about the project in 2023, after a long series of prototypes, as I taught myself about how to build a project like this. This first post describes the basic design of the hardware and software, and how it integrates with Home Assistant.

Here is a simple system diagram.
The watering state machine looks like this;
A year later, I published an update about the improved 4-plant version of the devce, with updated hardware and software.

Chris Lee

Slaven Damjanovic
hello42world
Dirk Herrendoerfer