A USB-C powered self-watering soil pot for one plant. The pot itself is a clean square planter — no wires hanging off it, no battery taped to the side — paired with a separate desk-side enclosure that holds the brain, the reservoir, and the pump. Connect the two with a single sleeved cable + tubing bundle. Pot lifts off the saucer for re-potting; everything else stays put.
The change
Earlier versions wrapped the electronics around the pot itself, which always looked tacked-on. The 2026 build moves everything off the pot:
- Square soil pot (180×180×220 mm) with drainage holes in the floor, a raised rim, and a +X rim saddle that takes the Adafruit 4026 STEMMA Soil probe upright.
- Matching drainage saucer (210×210 mm tray with a raised outer rim and a central recess) — pot drops on top, drips drain into the recess.
- Remote desk-side enclosure (170×100×120 mm) houses a built-in 1 L reservoir (fill cap on top), the ESP32-C6 Feather (inner +Y wall), an LM2596 buck (inner -Y wall), a BH1750 ambient-light sensor at the +Y lens window above the Feather, and a 5 V peristaltic pump on the floor between.
- Single tether runs from the pot's +X rim grommet, down to the desk, and into the enclosure's -X face. Carries the soil-probe wire and the dose tubing.
What's in the pack
Print-ready STL for every printed part (pot body, saucer, electronics enclosure, pump module, cable-bundle template), editable STEP, six angle renders + interactive WebGL viewer, a wired BOM with verified vendor pricing, and assembly instructions.


