Article covers measuring moisture contents in soil using Arduino-Uno & Moisture sensor.
Disclaimer
1. This article does not cover the calibration of moisture sensors.
2. This does not cover the working principles of flow meter.
Working sample
Before we proceed further, let us take a look at what our end result would look like.
Items Needed
- Arduino Uno
- Soil moisture sensor.
Pre-requisites
This post assumes you already have,
Arduino Editor installed on your laptop.
Your laptop connected to Arduino using the USB cable.
Basic familiarity with Arduino programming using C++.
Technical details
How moisture sensors work?
This post does not go deeper into the working details of moisture sensors. There are numerous materials available on the internet.
One such example: https://create.arduino.cc/projecthub/electropeak/complete-guide-to-use-soil-moisture-sensor-w-examples-756b1f
Moisture sensor used in this examples accepts 5V as input .
Schematic & Wiring diagrams
This is how the final setup looks like:
How-to steps
Step 1: Connecting Arduino to moisture sensor
Arduino Uno | Moisture Sensor | Remarks | Wire color |
5 V | + ve | 5 V | red |
GND | - ve | 5 V ground | black |
A2 | AO | Analog output | blue |
Step 2: Arduino C++ code
There are no libraries needed.
~~~~~~~~ C++ Code
Step 3: Testing the bidirectional message communication
Now the setup should be ready to test the moisture sensor. Please refer the last section of accompanying video in this page to see the working demo.
Closing note
Hope this post gives you the basic details for measuring the moisture contents using Arduino and resistive moisture sensor. Wishing you all the very best for your IoT projects.
Thanks,
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