SoilSensor spi
About the SoilSensor spi PCB
SoilSensor spi is an open source STM32 PCB design by angelnu, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 29 × 110.6 mm, with 21 components from 14 distinct parts.
Its main chip is the STM32L041K6Tx, from the STM32 family. Other key parts include the SoilSonde. By type, the board carries 8 capacitors, 4 resistors, 2 ICs, 2 connectors, 1 crystal and 1 diode.
It belongs with the iot & wireless and sensors designs in this gallery.
From the project
Settings for esphome
- Aisler PCB project - KiCad schematics - - KiCad PCB - - - Parts: - 1x ESP32-WROOM-32 - 2x pression sensors LPS33HWTR - 1x accelerometer LIS3DH - 1x IC power switch MCZ33996EK - 6 or 10 RJ-45 Modular Jack - 98435-111LF - 6 or 10 connectors - PINs: - Serial programmer: 1. VCC 2. RX 3. TX 4. GND - Power - 6 or 10 pumpe power ports - 6 or 10 ethernet ports - Firmwares: - esphome - You need to modify/create your own esphome definition and include the yaml in this folder matching your PCB - Example for v1.1 - platformio For testing without esphome you can use platformio to build and standalone…
Main components on the SoilSensor spi
SoilSensor spi bill of materials (BOM)
21 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32L041K6Tx | LQFP-32_7x7mm_P0.8mm | U1 |
| 1 | SoilSonde | soilSonde | U3 |
| 1 | 32KHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | Conn_01x06_Male | PinSocket_1x06_P2.54mm_Vertical | J1 |
| 1 | RJ45 | RJ45_kycon_GMX-SMT2-S-88-TR_Horizontal | J2 |
| 1 | BOOT | SW_SPST_TL3342 | BOOT1 |
| 1 | RESET | SW_SPST_TL3342 | RESET1 |
| 1 | LED | D_0805_2012Metric | D1 |
| 1 | Ferrite_Bead_Small | R_0805_2012Metric | FB1 |
| 2 | 10 pF | C_0805_2012Metric | C1, C2 |
| 4 | 100 nF | C_0805_2012Metric | C4, C5, C6, C7 |
| 2 | 1 uF | C_0805_2012Metric | C8, C10 |
| 3 | 12K | R_0805_2012Metric | R1, R3, R7 |
| 1 | 2M2 | R_0805_2012Metric | R2 |
SoilSensor spi design files
The KiCad project lives in the angelnu/esphome repository on GitHub; these links point at the commit this page was built from.
SoilSensor spi: common questions
What microcontroller does the SoilSensor spi use?
The SoilSensor spi is built around the STM32L041K6Tx, from the STM32 family.
How big is the SoilSensor spi PCB?
The SoilSensor spi measures 29 × 110.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SoilSensor spi?
21 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the SoilSensor spi design files?
From the angelnu/esphome repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the SoilSensor spi design in my own project?
Yes, under the terms of its Apache-2.0 license, which angelnu chose for the repository.
Can I test firmware for the SoilSensor spi 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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