This is a sensor that can measure the soil moisture of plants. The soil moisture sensor consists of two probes, allowing current to pass through the soil and then obtaining the resistance value to measure the soil moisture content. It can be used to determine whether the plants in the garden need watering. You can also use soil moisture sensors in the garden to water automatically. It can be used very easily. Just insert the sensor into the soil and read the output using the ADC.
Soil moisture sensor based on soil resistivity measurement - composed of two probes, allowing current to pass through the soil
Convenient to use and high cost performance