int sensorInput = 0;     // RCWL-0516 Input Pin for Arduino
int sensorval = 0;  // RCWL-0516 Sensor Value

void setup() {
  Serial.begin(9600);
  pinMode (sensorInput, INPUT);
}
 
void loop(){
  sensorval = digitalRead(sensorInput);
  Serial.println(sensorval);
}