HardLabs

Watering controller

bendixsonnenberg·watering_controller·hardware/sensor/moisture_sensor/moisture_sensor.kicad_pcb

Watering controller PCB layout, top view — open source STM32 board by bendixsonnenberg

About the Watering controller PCB

Watering controller is an open source STM32 PCB design by bendixsonnenberg, published on GitHub under the MIT license. It is a 2-layer board measuring 96.6 × 132.4 mm, with 30 components from 19 distinct parts.

Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the MCP2551-I-SN and AMS1117-3.3. By type, the board carries 12 capacitors, 4 connectors, 3 ICs, 3 switches, 3 diodes and 3 resistors.

It belongs with the sensors and displays & leds designs in this gallery.

From the project

Codewise: an exploration of using embedded rust, specificaly embassy.

Codewise: an exploration of using embedded rust, specificaly embassy.

Central Controller: - Pico 2 W (pico 1 2 would be enough) - 2x16 LCD Display - MCP2515 for can communication. - UX to be determined

Additional Hardware needed: - Some kind of reservoir - Silicone tubes for delivering water to valves

Small Addition: I startet building a webinterface, all while learning how to work with HTML and JavaScript. If you're interested, click here.

Main components on the Watering controller

STM32F103C8TxMCP2551-I-SNAMS1117-3.3

Watering controller bill of materials (BOM)

30 components, 19 distinct parts.

QtyPartRefs
1
STM32F103C8Tx
U1
1
MCP2551-I-SN
U2
1
AMS1117-3.3
U3
1
AO3400A
Alpha & Omega Semicon
Q1
1
Conn_01x04_Socket
J1
1
Conn_01x02_Pin
J2
2
USB_C_Plug_USB2.0
P1, P2
1
Tactile Button, 160gf
XKB Connectivity
S1
1
SW_SPDT
SW2
1
SW_DIP_x08
SW3
2
1N4148W
D1, D2
1
WS2812B
D3
1
120R
FB1
6
100n
C1, C2, C3, C5, C6, C9
1
10u
C4
2
1u
C7, C8
2
22u
C10, C11
1
100n
C14
3
10k
R1, R2, R3

Watering controller design files

The KiCad project lives in the bendixsonnenberg/watering_controller repository on GitHub; these links point at the commit this page was built from.

Watering controller: common questions

What microcontroller does the Watering controller use?

The Watering controller is built around the STM32F103C8Tx, from the STM32 family.

How big is the Watering controller PCB?

The Watering controller measures 96.6 × 132.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Watering controller?

30 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the Watering controller design files?

From the bendixsonnenberg/watering_controller repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Watering controller design in my own project?

Yes, under the terms of its MIT license, which bendixsonnenberg chose for the repository.

Can I test firmware for the Watering controller without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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