The hardware is consists of an Arduino microcontroller (here an Arduino Uno R3) and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, gives ...

[David] had exactly this problem with a pH sensor, and rather than buy an expensive module to do the job he designed his own. The sensor in question produces a relatively tiny voltage of -0.414 to ...

Arduino enthusiasts and beginners may be interested in a new add-on board designed for the Arduino Uno microcontroller featuring 10 of the most popular modules and sensors for the Arduino platform.