Soil Moisture Sensor Module เซ็นเซอร์วัดความชื้นในดิน

Specifications
The specifications of the soil moisture sensor FC-28 are as follows
Input Voltage 3.3 – 5V
Output Voltage 0 – 4.2V
Input Current 35mA
Output Signal Both Analog and Digital
Pin Out – Soil Moisture Sensor
The soil Moisture sensor FC-28 has four pins
VCC: For power
A0: Analog output
D0: Digital output
GND: Ground
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const int sensor_pin = A1; /* Soil moisture sensor O/P pin */
void setup() {
Serial.begin(9600); /* Define baud rate for serial communication */
}
void loop() {
float moisture_percentage;
int sensor_analog;
sensor_analog = analogRead(sensor_pin);
moisture_percentage = ( 100 - ( (sensor_analog/1023.00) * 100 ) );
Serial.print("Moisture Percentage = ");
Serial.print(moisture_percentage);
Serial.print("%\n\n");
delay(1000);