Arduino 土壤湿度传感器实验

代码

int analogPin = A5;
int val = 0; // variable to store the value read
int value = 0;
#define ledPin 9

#define LIGHT_MAX 70

void setup()
{
  Serial.begin(9600); // setup serial
  pinMode(ledPin, OUTPUT);
}

void loop()
{
  val = analogRead(analogPin); // read the input pin
  Serial.println(val); // debug value

  value = map(val, 0, 1023, 100, 0);
  Serial.print("HUMI=");
  Serial.println(value); // debug value

  if (value <= 70)
  {
    digitalWrite(ledPin, HIGH);
  }
  else
  {
    digitalWrite(ledPin, LOW);
  }

  delay(1000);
}