Soil Moisture Sensor Hookup Guide
Sarah Al-Mutlaq, 
Joel_E_B, Ell C Introduction
Have you ever wanted your plants to tell you when they need watered? Or know how saturated the soil in your garden is? With the SparkFun Soil Moisture Sensor, you can do just that! This tutorial will show you how to get started using the Soil Moisture Sensor as well as how to build your own soil moisture sensing project. If you prefer not to solder, you can purchase the sensor with a 3-pin screw terminal pre-soldered onto the board.
And if you're really in a hurry, use our plug-and-play Qwiic Soil Moisture Sensor!
Required Materials
To follow along with the project at the end of this tutorial, you will need the following. You may not need everything, though, depending on what you already have and which sensor you prefer. Add it all to your cart with the button below and modify as necessary.
Suggested Readings
There isn't much to learning how to use the Soil Moisture Sensor. However, you may find the following concepts useful along the way.
How to Solder: Through-Hole Soldering
Voltage, Current, Resistance, and Ohm's Law
Analog to Digital Conversion
Resistors
Soil moisture-sensing by hacking a solar light
If you aren't familiar with the Qwiic system, we recommend reading here for an overview should you decide to use the Qwiic version.
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| Qwiic Connect System |