IoT moisture sensor v2.0 for Eduponics mini (Short)


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20 x 102.03 mm


IoT moisture sensor For Eduponics Mini (short)

The STEMinds Eduponics IoT moisture sensor is a versatile, precise, and one of the best low-cost soil moisture sensors available on the market.

Designing IoT sensors is hard, and designing good IoT moisture sensors is even harder. During the 3 months of sensor development, we ensured that the IoT soil sensor we designed is precise, accurate, and gives consistent results. The soil sensor will work for long periods of time in various types of conditions without breaking a sweat.

If you are looking for a high-quality IoT moisture sensor, The Eduponics Mini IoT moisture sensor definitely stands for the task. The sensor will operate in multiple conditions and support all kinds of hardware platforms. Including but not limited to Raspberry Pi, Arduino, STM, and obviously ESP32. It supports many programming languages such as Arduino C, MicroPython, and Python3.

In the market, there are mainly 2 types of sensors available for low price tags: capacitive and resistive IoT moisture sensors. Our custom moisture sensor works on the same principle as a capacitive sensor. This means the moisture sensor can be used continuously without the fear of corrosion.

Since version 1.0 of the Eduponics mini soil moisture sensor, we’ve made quite an improvement. Most notable one – Adding a 4P grove compatible interface.

This sensor is best compatible with the Eduponics Mini ESP32 development board.

hardware specification

  • NEW– Grove 4P compatible interface
  • Corrosion-resistant, Capacitive soil-moisture sensor
  • 5 V operating voltage, 3.3 V output (voltage regulator is built-in)
  • Highly accurate and precise sensor, suitable for long-term use.
  • Short Sensor dimensions: 20 x 102.03 mm

One thing to note about this sensor is that it doesn’t have any glue or covering over the circuit board. Do not submerge the sensor under water or expose it for long-term outdoor use under moisture conditions.

Comparison to other soil moisture sensors

We’ve compared a variety of sensors that are available in the open market. We’ve concluded that the resolution (precision) of the STEMinds soil moisture sensor is the most precise one due to its quality components and design. We can proudly claim we have one of the best soil moisture sensors for DIY hobbyists and makers in the market today.

a complete comparison is available on the Eduponics mini crowdfunding page.

Soil moisture sensor use cases and applications

There are many applications for such sensor, some of them includes:

  • Garden and plants soil moisture monitoring
  • Detection of water leak
  • Water level detection

Documentation and resources

Complete documentation is available at STEMinds official docs and the entire code is available both in Arduino C and MicroPython over our GitHub repository.

In any doubt,  question, suggestion, or problem we have the discussion forum available at all times.




20 x 102.03 mm

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