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FC-28 Soil Humidity Detection Sensor Module blue / Arduino compatible / comes with Dupont Wires ↓ details & specifications
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3 ~ 4
5 +
Color Blue
Ports VCC / GND / DO
Electronic Components
Architecture Arduino
Operating Voltage 3.3-5 -volt
PCB Size 32*14 mm
Package Type Retail
Package Contents 1*Soil Humidity Sensor Module, 2*Dupont Wires
Dimensions us | metric
Cable Length 20 cm
Depth 43 mm
Height 7 mm
Width 14 mm
Product Weight 6.9 g
SKU 1380900
DATE LISTED 6/17/2013
  • This is a summary of the moisture sensor can be used to detect soil moisture, when soil water deficiency, the module outputs a high level, whereas output low level. Using this sensor to water the flowers make an automatic device, without people to manage your garden plants.
  • Sensitivity can be adjusted (figure blue digital potentiometer adjust)
  • Soil humidity module on the environment humidity the most sensitive, generally used to detect soil humidity
  • Module in soil moisture can not reach the setting threshold, DO mouth output high level, when soil moisture more than setting threshold value, module D0 output low level
  • Has fixed bolt hole, convenient installation
  • Comparator using LM393 chip, work stability
  • Two small plate interface specifications (3 wires)
  • - VCC external 3.3~5 V
  • - GND external GND
  • - DO small plate digital output interface (0 and 1)
  • - Digital output D0 can be directly connected with the single chip microcomputer, through the single chip microcomputer to detect high and low level, thus to detect soil humidity
Commonly Asked Questions:

Q1. Why are these called "Arduino Compatible"?
A1. The Arduino group demanded us to remove their logos and rename these products so that they do not lead customers to believe they are the same units sold by Arduino.
Q2. Are these real Arduino's, then?
A2. We cannot answer that question without starting a war :(. Officially, the answer is we do not know.
Q3. Are these 100% compatible with the "normal" Arudino's?
A3. Yes, they really are completely compatible with "normal" Arduino's. Build quality looks the same and everything (studio, library, tools, etc) just works. Just read the reviews here, here, here, and here.
Q4. What if I'm still concerned about the missing logos and about this being named as "Arduino Compatible"?
A4. If you're still in doubt, please buy from Arduino's official dealers. Yes they are more expensive, but if you're still worried we'd rather not take your order. We do not make these afterall and we are providing all the information we know. Don't kill the messenger.

We'd love to help! Contact Customer Advocates.

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Available models and parts:
blue / Arduino compatible / comes with Dupont Wires
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  • JoinedFeb 2014
  • Posts 7
  • Reviews 84
  • Kudos1
› Quality
› Value
easy to use
Works well, easy to use. just plug and play
Reviewed on 1/19/2016 Was this review helpful to you? Yes / No


  • JoinedJan 2014
  • Posts 350
  • Reviews 80
  • Kudos191
› Quality
› Value
Works well of Arduino Uno (real and clone)
Fun to experiment with, you can find a few projects online if you google it a bit.
Reviewed on 9/12/2014 Was this review helpful to you? Yes / No


  • JoinedApr 2014
  • Posts 98
  • Reviews 52
  • Kudos41
› Quality
› Value
Very simple sensor with comparator, easy to use and adjust. You might don't want to constantly power it since DC is not good for permanent apply on soil.
Reviewed on 9/12/2014 Was this review helpful to you? Yes / No
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