FC-28 Soil Moisture Hygrometer Module ARDUINO

The FC-28 moisture sensor module is designed to measure soil moisture. The module can be used in projects for which it is necessary to read soil moisture data (automation of plant irrigation control, etc.)

This module, like most sensors for Arduino, is designed on the LM393 comparator, which compares the signals at the output of the sensor. Also on the board is a potentiometer for adjusting the sensitivity threshold of the sensor.

The FC-28 is designed around two sensors that provide soil moisture measurements. Moisture is determined using two probes that allow current to pass through the soil. When current passes, the sensor measures the resistance and ultimately measures the amount of water in the soil. The more water, the less resistance, respectively, if the soil is dry, then the resistance will be greater.

The module is connected to the Arduino through 4 outputs (GND, VCC, D0 and A0). GND and VCC are used to supply power to the board with a value of 3.3 - 5V. A0 is an analog output that accepts analog values of 0 - 1023. D0 is used as a digital output to connect to the Arduino.

The power supply to the module can be supplied from a microprocessor device or an external power source.

There are two LEDs on the board. The blue LED indicates power supply to the module, respectively, the red LED lights up when a signal is transmitted to the microcontroller.

After connecting the module to the Arduino, you need to place the sensor in the measurement environment. Then the written program code for the sensor in the Arduino IDE development environment must be loaded into the microcontroller's memory for the module and Arduino Uno to work together.

Sensor Specifications:
Supply voltage, V 3.3 ... 5
Maximum current consumption, mA 50
Comparator LM393
Module dimensions, mm 38x16x8
Sensor dimensions, mm 64x20x8
Cable length, m 0.2