If you happen to have flowers you need to water often in your home, this can be the beginning of a cool adventure. You can use the soil moisture combined with the Arduino board to help you remember to water your plants when needed.
We can add a LED to signal that the flowers need water.
Let’s get started
So what you need:
Let’s start with a quick explanation of how this sensor works. Basically, the electrodes (the legs) work as an open circuit. Those electrodes help measure the conductivity of the soil when inserted into the soil. These electrodes when inserted into the soil give an analog value depending on the degree of conductivity of the soil.
So this is the circuit connection.
The board between the Arduino and the probe is a controller that helps calibrate the sensing capabilities of the sensor. The connections between the sensor controller and the probe can be done without caring about the polarities of the probe (the probe has no polarity). Make sure you connect the analog output of the sensor to the Arduino. There is also a digital output but we won’t use it here.
