Day 15 Arduino Advent Calendar

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Arduino Advent Calendar Day 15 - Soil Moisture Sensor!

As I write this guide, it's 41ºC at LittleBird HQ and cross Australia today, many plants will die a needless death from dehydration, but thanks to today's guide, yours need not! 

Today we're looking at the Moisture Sensor! 

What is a Soil Moisture Sensor? 

Soil moisture sensors measure the volumetric water content in the soil. 
The two large exposed pads function as probes for the sensor, together acting as a variable resistor.
The more water (and salt) in the soil, the lower the resistance.
We're able to measure this change in resistance as a change in voltage.

Yup, enough talking about it let's go and build up the circuit over at !

Let's Get Started with the Day 15 Guide!

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