HardLabs

Plant-Monitor

C-yue28·Plant-Monitor·MAIN_PCB/Plant Monitor.kicad_pcb

Plant-Monitor PCB layout, top view — open source RP2040/RP2350 board by C-yue28

About the Plant-Monitor PCB

Plant-Monitor is an open source RP2040/RP2350 PCB design by C-yue28, published on GitHub. It is a 6-layer board measuring 42.8 × 66.3 mm, with 59 components from 34 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AP2112K-3.3, DRV8833PWP, W25Q16JVSS and MCP73831-2-OT. By type, the board carries 21 capacitors, 15 resistors, 9 connectors, 5 ICs, 5 diodes and 2 switches.

It belongs with the sensors, displays & leds and dev boards & breakouts designs in this gallery.

From the project

ML-powered plant monitor, tracking metrics such as temperature, humidity, soil moisture, etc to inform plant watering behavior. A small OLED screen displays the various metrics and gives an estimate of the time until the next watering.

This smart, fully automated plant monitor system monitors soil moisture, atmospheric temperature/pressure, and humidity to determine when to water the plant, and then uses a small pump to water the plant. This is meant to be a project where I learn how to design a PCB, and it is also my first project with HackClub so I am getting used to this type of work. I kept it somewhat simple this time; if my custom devboard is successful I plan to build upon this project in the future and create an automated gardening system with a web dashboard.

Plant-Monitor, from the project README
From the project README

Main components on the Plant-Monitor

RP2040AP2112K-3.3DRV8833PWPW25Q16JVSSMCP73831-2-OT

Plant-Monitor bill of materials (BOM)

59 components, 34 distinct parts.

QtyPartRefs
1
RP2040
U1
1
AP2112K-3.3
U2
1
DRV8833PWP
U3
1
W25Q16JVSS
U4
1
MCP73831-2-OT
U5
1
AO3401A
Q1
1
ABM8-272-T3
X1
1
TYPE-C-31-M-12
J1
1
Motor 1
J2
1
Motor 2
J3
1
Grove Connector for Soil Moisture Sensor
J4
1
Grove Connector for OLED Display
J5
2
Conn_01x14
J6, J7
1
JST PH-2Pin
J8
1
BME280 Terminals
J9
2
SW_Push
SW1, SW2
2
1N5819WS
D1, D5
3
Green
D2, D3, D4
10
0.1uF
C0, C1, C2, C3, C5, C6, C7, C8 +2
4
1uF
C4, C9, C12, C13
Show 14 more
QtyPartRefs
1
2.2uF
C14
1
10uF
C15
2
15pF
C16, C17
1
100nF
C18
2
4.7uF
C19, C20
2
27R
R1, R2
2
0.2
R3, R4
3
1k
R5, R9, R12
2
5.1K
R6, R7
2
10k
R8, R13
1
2k
R10
1
470
R11
1
330
R14
1
500
R15

Plant-Monitor design files

The KiCad project lives in the C-yue28/Plant-Monitor repository on GitHub; these links point at the commit this page was built from.

Plant-Monitor: common questions

What microcontroller does the Plant-Monitor use?

The Plant-Monitor is built around the RP2040, from the RP2040/RP2350 family.

How big is the Plant-Monitor PCB?

The Plant-Monitor measures 42.8 × 66.3 mm, has 6 copper layers and is 1.566 mm thick.

How many components are on the Plant-Monitor?

59 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the Plant-Monitor design files?

From the C-yue28/Plant-Monitor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Plant-Monitor design in my own project?

The repository has no license, so all rights stay with C-yue28. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Plant-Monitor without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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