const int knockSensor = A0; // the piezo is connected to analog pin 0
const int sensor2 = A1;
const int sensor3 = A2;
const int sensor4 = A3;
const int sensor5 = A4;
const int sensor6 = A5;
const int Pin = 13;
// these variables will change:
int sensorReading = 0;
//int ledState;

void setup() {
 // pinMode(Pin,OUTPUT);
  Serial.begin(57600);       // use the serial port
}

void loop() {
  // read the sensor and store it in the variable sensorReading:
  sensorReading = analogRead(knockSensor);
  Serial.write(sensorReading);
  //Serial.println(sensorReading,"\t");

  //digitalWrite(Pin,ledState);
  delay(1);

 }