Prong Soil Moisture Sensor for BBC micro:bit
I give the Prong Soil Moisture Sensor for BBC micro:bit a rating of 5 stars!
Renee McIntyre
Kitronik
Prong Soil Moisture Sensor for BBC micro:bit
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The Prong Soil Moisture Sensor mounts directly onto a BBC micro:bit to monitor soil moisture levels. Two conductive tines are inserted into the soil — any mo...
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The Prong Soil Moisture Sensor mounts directly onto a BBC micro:bit to monitor soil moisture levels. Two conductive tines are inserted into the soil — any moisture conducts an analogue voltage that the micro:bit reads on Pin 1, ranging from 0 V (dry) to 3 V (wet).
Powered from the micro:bit's 3 V supply via USB or JST. Attach the board using the included M3 hardware through the P1, 3V, and GND holes, or connect with crocodile clips. Compatible with MakeCode, Python, and other micro:bit editors.
Key Features
- Direct micro:bit Mount – Bolts onto the micro:bit with M3 hardware
- Analogue Output – Reads soil moisture on Pin 1
- 3 V Powered – Runs from the micro:bit's built-in supply
- Mi:Power Compatible – Add a Mi:Power board for standalone operation with audible alarm on P0
- Crocodile Clip Option – Connect without soldering
Specifications
- Length – 68 mm
- Height – 53 mm
- PCB Thickness – 1.6 mm
Ideal For
- Plant watering monitors and smart garden projects
- STEM and classroom experiments
- Standalone environmental sensing with Mi:Power board
Package Contents
- 1× Prong Soil Moisture Sensor
- 3× M3 hex nuts
- 3× M3 countersunk screws
Note: Requires a BBC micro:bit (sold separately). To prolong electrode life, take periodic moisture readings rather than continuous sampling.
Jargon buster
Plain-language definitions for the technical terms used above.
- GND
- GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
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