Soil Testing Module Overview
0:39
Yes – your schematic already implements a full LoRa-based soil-monitoring core:
- Analog front-end: the soil probe input comes in at sensor, is buffered/amplified by IC1 (MAX40005ANS02+T) and fed into
- MCU: U2 (STM32L031G6U6S) via PA8 ADC, which processes the measurement, then
- Radio: communicates over SPI to U1 (RFM95W-915S2) and sends out via the antenna at J2.
- Power and decoupling are handled by your battery input [BATT1], rail decouplers ([C1]–[C4]) and net portals for 3V3/GND.
- LEDs and current-limit resistors provide status indicators.
All that remains is to attach your actual soil-moisture probe to the [sensor] net portal (and flash the appropriate firmware). Would you like to add a dedicated connector footprint for the probe, or select a specific sensor?
Add JST connector
Add screw terminal
Select capacitive sensor
I2C sensor modules
Create net class
272 days
LoRa_DIO0
SWCLK
LED_G
SPI1_MOSI
LoRa_RST
SPI1_CS
SWDIO
SPI1_CS
BOOT0
LED_R
LoRa_DIO0
USART2_RX
SPI1_SCK
SPI1_MISO
LED_B
USART2_RX
USART2_TX
LoRa_RST
SPI1_MOSI
ANT
RST
sensor
USART2_TX
SWDIO
RST
SPI1_SCK
SWCLK
BOOT0
SPI1_MISO
C4
Capacitance
1uF
3V3
3V3
C3
Capacitance
1uF
C2
Capacitance
10uF
3V3
3V3
C1
Capacitance
1uF
3V3
3V3
3V3
3V3
LED1
J1
GND
R4
Resistance
220 Ω
R2
Resistance
220 Ω
R3
Resistance
10KΩ
R5
Resistance
10kΩ
R1
Resistance
220 Ω
USART2_RX
USART2_TX
U2
BATT1
IC1
U1
Reviews
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LoRa soil monitor Module
This is a LoRa soil monitor module. It uses a STM32L031G6U6S microcontroller and a RFM95W-915S2 LoRa transceiver, integrated with sensor interfacing and LED indicators. Communication occurs via USART and SPI. The system is powered using a battery.
#reusable #module #sublayout #simple-embedded #stm
Properties
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Digi-Key | $9.51–$10.53 |
LCSC | $9.19 |
Mouser | $30.56 |
Controls
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