Code for Interfacing Knock Sensor Module KY-031 in Arduino

Interfacing_Knock_Sensor_Module_KY-031_in_Arduino.ino

int Led = 13 ;// define LED Interface
int knockmodule = 2; // define the vibration sensor interface
int val; // define numeric variables val

void setup ()
{
  pinMode (Led, OUTPUT) ; // define LED as output interface
  pinMode (knockmodule, INPUT) ; // output interface defines vibration sensor
}

void loop ()
{
  val = digitalRead (knockmodule) ; // read digital interface is assigned a value of 3 val
  if (val == HIGH) // When the vibration sensor detects a signal, LED flashes
  {
    digitalWrite (Led, LOW);
    Serial.print(val);
  }
  else
  {
    digitalWrite (Led, HIGH);
    Serial.print(val);
  }
}