# BYITL HP-01 — Hydroponic Plant Pot (rev A)

A countertop **Kratky-method** hydroponic pot for one plant. A 3-inch net cup
sits in the lid with its base just touching the nutrient solution; as the plant
drinks the level down, the roots draw a growing air gap. **No pump, no aeration
hardware** — the Kratky method is passive by design.

An **Adafruit Feather ESP32-S3** in a separate dry tower monitors **pH**, **EC**
(nutrient strength) and **ambient light**, runs a **WS2812 grow-light strip**
through a MOSFET power switch, and a **clear sight window** shows the water level.

**Powered by a single USB-C wall adapter — 5 V throughout. No battery.**

## What's in this pack

| File | What |
|---|---|
| `*.stl` | The 7 printable parts (print `net_cup` only if not buying one) |
| `*.step` | Editable CAD of each printed part |
| `bom.csv` | Full bill of materials with buy links |
| `PRINTING.md` | Materials, the reservoir leak-test, wet/dry rules |
| `ASSEMBLY.md` | Step-by-step build + planting |
| `WIRING.md` | The full USB-C power + sensor harness |
| `viewer.html` | 3-D viewer — open in any browser, drag to rotate |
| `assembly.glb` | The whole assembly for any 3-D editor |
| `render_*.png` | Studio renders |

## At a glance

- **Reservoir:** ~2.5 L, PETG, water-tight, with a silicone-sealed, bezel-clamped
  sight window.
- **Electronics:** ESP32-S3 Feather + pH + EC + BH1750 light + WS2812 grow light,
  all in a **dry** tower that a reservoir leak can't reach.
- **Fits** a Bambu P1S (256³) and larger.
- **Print the reservoir in PETG and leak-test it before planting.**

Every electronic part is modelled from real vendor CAD or a datasheet-built
model — the enclosure is designed around the actual hardware, not the other way
round.
