2 layers24.1 × 36.2 mm
Esp32miniBT
asterics/esp32_mouse_keyboard
ESP32 implementation for HID over GATT Keyboard and Mouse (Bluetooth Low Energy). Including serial API for external modules (similar to Adafruit EZKey HID)
28 parts911GPL-3.0
2 layers80.3 × 59.4 mm
PlantWatering
Meltwin/PlantWateringAutomated plant watering system
- Size
- 80.3 × 59.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 37
- Pads
- 85
- Tracks, vias
- 91, 1
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 18 May 2024
- Updated
- 29 Jun 2026
Overview
PlantWatering is an open-source printed circuit board by Meltwin, from the Meltwin/PlantWatering repository on GitHub, published under the MIT licence. It is a 2-layer board of 80.3 × 59.4 mm with 26 parts on 37 nets, routed with 91 tracks and 1 via.
It is built around the ESP32-WROOM-32. Its parts include 12 connectors, 7 diodes, 6 resistors and 1 IC. It belongs with the ESP32 boards of this library.
Main components
1README
README.mdAutomatic plant watering system
This project consist of making an automated watering system for my plants. It works with an ESP-32 board that controls a 5V pump. This repository contains:
- The electrical schematic (made in KiCAD) that can be found in the
KiCADfolder, - The code for the ESP-32 board in the
plant_wateringfolder,
The project was tested and made on a ESP-WROOM-32 board.
Distributed under the MIT licence. Copyright (c) 2024 Meltwin
Hardware description
The parts used here are:
- an ESP32 board,
- a dual MOFSET driver,
- USB-C female port for power input,
- Barrel Jack female port for power output (for the pump)
Software description
The software available here control a 5V pump through the dual MOSFET driver with a PWM signal. There two main parameter for controlling the pump behaviour: the opened time and the opened frequency. This way people can freely choose the quantity of water to actually drop according to the type of plant.
This data will be stored onto the ESP controller internal storage so that it survive power disconnect.
Online resources used
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 220Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R4, R5, R6 |
| 4 | LED | LED_THT:LED_D3.0mm | D2, D6, D7, D8 |
| 3 | D | Diode_THT:D_5W_P10.16mm_Horizontal | D3, D4, D5 |
| 1 | 4xLR6 1.5V Battery Pack | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J6 |
| 1 | ESP32-WROOM-32 | Meltwin:ESP32-C3-DevKitM-1 | U1 |
| 1 | PLANT1 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J2 |
| 1 | PLANT2 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J3 |
| 1 | PLANT3 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J4 |
| 1 | PUMP1 PMW | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J11 |
| 1 | PUMP1 PWR | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J8 |
| 1 | PUMP2 PMW | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J12 |
| 1 | PUMP2 PWR | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J9 |
| 1 | PUMP3 PMW | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J13 |
| 1 | PUMP3 PWR | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J10 |
| 1 | Potentiometer | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J7 |
| 1 | R_Battery | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | R_battery | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | WATER1 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J5 |
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Questions
How big is the PlantWatering PCB?
It measures 80.3 × 59.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PlantWatering use?
26 parts, built around the ESP32-WROOM-32. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the PlantWatering KiCad files?
From the Meltwin/PlantWatering repository on GitHub, at the commit this page was made from: the board is KiCAD/plant_watering/plant_watering.kicad_pcb and its schematic KiCAD/plant_watering/plant_watering.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PlantWatering design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).