Grove - Water Sensor
User Manual
Release date：
Version：
2015/9/22
1.0
Wiki:
http://www.seeedstudio.com/wiki/index.php?title=Twig_-_Water_Sensor
Bazaar:
http://www.seeedstudio.com/depot/Grove-Water-Sensor-p-748.html?cPath=25_27
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Document Revision History
Revision
1.0
Date
Sep 22, 2015
Author
Loovee
Description
Create file
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Contents
Document Revision History ·····································2
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1. Introduction ············································2
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2. Features ·············································· 3
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3. Applications Ideas ········································4
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4.
Cautions
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5. Specification ··········································· 6
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6. Usage ··············································· 7
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6.1
6.2
With Arduino ············································ 7
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With Raspberry Pi
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7. Resources ·············································
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Disclaimer
For physical injuries and possessions loss caused by those reasons which are not related to
product quality, such as operating without following manual guide, natural disasters or force
majeure, we take no responsibility for that.
Under the supervision of Seeed Technology Inc., this manual has been compiled and published
which covered the latest product description and specification. The content of this manual is
subject to change without notice.
Copyright
The design of this product (including software) and its accessories is under tutelage of laws. Any
action to violate relevant right of our product will be penalized through law. Please consciously
observe relevant local laws in the use of this product.
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1. Introduction
The Water Sensor module is part of the Grove system. It indicates whether the sensor is dry, damp
or completely immersed in water by measuring conductivity. The sensor traces have a weak pull-
up resistor of 1 MΩ. The resistor will pull the sensor trace value high until a drop of water shorts
the sensor trace to the grounded trace. Believe it or not this circuit will work with the digital I/O pins
of your Arduino or you can use it with the analog pins to detect the amount of water induced contact
between the grounded and sensor traces.
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