The Robotbanao Soil Hygrometer module is convenient to sense the moisture level of the soil and determine whether the plants have been overwatered or underwatered. It has 2 probes which act as variable resistors. The two probes allow the current to pass through the soil and then it gets the resistance value to measure the moisture value.
A fixed bolt hole for easy installation | With power indicator (red) and digital switching output indicator (green) | Having LM393 comparator chip | Stable | Dual output mode
Soil hygrometer humidity detection module is used to detect moisture in the soil. It is sensitive to ambient humidity. The output level of the module is high when the soil is dry, else the output is low. The sensor can be used to make automatic watering systems.
Operating voltage: 3.3V~5V | With power indicator (red) and digital switching output indicator (green) | FC-28 with LM293 || Interface Description (4-wire): VCC:3.3 V-5V | GND:GND | DO:Digital output interface (0 and 1) | AO:Analog Output Interface