int i=0;
float rain=0.0;
const int REED_PIN = 3; // Pin connected to reed switch,has to be a PWM pin
const int LED_PIN = 12; // LED pin - active-high
int old_val = 0;                //Old value of reed switch
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
pinMode(REED_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
   int proximity = digitalRead(REED_PIN); // Read the state of the switch
  // int proximity = LOW;
  if ((proximity == LOW)  && (old_val == HIGH)) // If the pin reads low, the switch is closed.
  {
    
    delay(10); 
    // Serial.println("Switch closed");
    old_val=proximity;
     i=i+1;
     rain=0.03*i;
    digitalWrite(LED_PIN, HIGH); // Turn the LED on
    Serial.print("Rain Height=");
      Serial.print(rain);
      Serial.println(" mm");
  }
  else
  {
    digitalWrite(LED_PIN, LOW); // Turn the LED off
    old_val=proximity;
  }
 

  // delay(1000);

}