2 layers15 × 117 mm
Soil probe
GewoonMaarten/soil-sensor
Schematic and PCB for a capacitive soil moisture sensor 🌱.
7 parts10
2 layers26 × 120.3 mm
Soil sensor 2
GewoonMaarten/soil-sensor10Schematic and PCB for a capacitive soil moisture sensor 🌱.
- Size
- 26 × 120.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 29
- Nets
- 48
- Pads
- 159
- Tracks, vias
- 226, 219
- Pours
- 17
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Nov 2018
- Updated
- 18 Aug 2026
Overview
Soil sensor 2 is an open-source printed circuit board by GewoonMaarten, from the GewoonMaarten/soil-sensor repository on GitHub. It is a 2-layer board of 26 × 120.3 mm with 29 parts on 48 nets, routed with 226 tracks and 219 vias.
It is built around the ESP32-PICO-V3 and SI2312. Its parts include 8 capacitors, 4 resistors, 3 ICs, 2 connectors and 1 diode. It belongs with the sensors and measurement boards and the ESP32 and RISC-V boards of this library.
Main components
2README
devices/soil-sensor/hardware/v2/README.mdOut-of-phase soil sensor
Based on the Capacitive-Based Liquid Level Sensing Sensor Reference Design.
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C6, C8 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C4, C5, C7 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 1M5 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 2.2uH | Inductor_SMD:L_Taiyo-Yuden_NR-40xx | L1 |
| 1 | 250k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 3k3 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 532610471 | Soil_Sensor:MOLEX_532610471 | J1 |
| 1 | Antenna_Chip | RF_Antenna:Texas_SWRA117D_2.4GHz_Right | AE1 |
| 1 | ESP-PROG | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J2 |
| 1 | ESP32-PICO-V3 | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm | U3 |
| 1 | G*** | kibuzzard-61BE0345 | kibuzzard-61BE0345 |
| 1 | G*** | kibuzzard-61BE0025 | kibuzzard-61BE0025 |
| 1 | G*** | kibuzzard-61BE0016 | kibuzzard-61BE0016 |
| 1 | G*** | kibuzzard-61BE001F | kibuzzard-61BE001F |
| 1 | G*** | kibuzzard-61BE000A | kibuzzard-61BE000A |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SHT4x | Soil_Sensor:XDCR_SHT40-AD1B-R2 | U1 |
| 1 | SI2312 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | TPS61201DRCT | Package_SON:Texas_S-PVSON-N10_ThermalVias | U2 |
The 26 most common of 29 parts.
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Questions
How big is the Soil sensor 2 PCB?
It measures 26 × 120.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Soil sensor 2 use?
29 parts, built around the ESP32-PICO-V3 and SI2312. 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 Soil sensor 2 KiCad files?
From the GewoonMaarten/soil-sensor repository on GitHub, at the commit this page was made from: the board is devices/soil-sensor/hardware/archive/soil-sensor-v2/soil_sensor_2.kicad_pcb and its schematic devices/soil-sensor/hardware/archive/soil-sensor-v2/soil_sensor_2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Soil sensor 2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask GewoonMaarten before reusing the design.