Using the following Arduino code write a complete code that will display into the serial monitor the number of valid knocks (you can choose what is considered a good knock).

When 2 valid claps (or knocks) are detected, turn on an LED. After 2 more knocks, the LED should turn off.

*code for using transducer as a sensor*

const int piezo = a0; // Pin connected to piezo

int knockVal; // Value for knock strength

void setup () {

Serial.begin(9600);

}

void loop () {

knockVal = analogRead(piezo)

if(knockVal > 0){

Serial.println(knockVal);