Soil/Rain sensor module: S09

A module that generates an output voltage based on the resistance of the soil moisture or rain sensor and provides it to the analog or digital output pin.

Soil Moisture sensor:

A fork-shaped probe with two exposed conductors acts as a variable resistor whose resistance varies according to the water content in the soil.

Rain sensor:

The sensing pad with a series of exposed copper traces together acts as a variable resistor whose resistance varies according to the amount of water on its surface.