#define sensorPin D10
const int rLED = D8; // red LED
int motionState = LOW;  // we start and assuming no motion detected
int val = 0; // valuable for reading the pin status

void setup() {
  Serial.begin(9600);
  pinMode(sensorPin, INPUT);
  pinMode(rLED, OUTPUT);
}

void loop() {
  while (digitalRead(sensorPin)==LOW); // Do nothing when the RCWL stay in LOW state
  digitalWrite(rLED, HIGH);  // turn LED on
  Serial.println("Motion detected!");

  while (digitalRead(sensorPin)!=LOW);  // Do nothing when the RCWL stay in HIGH state
  digitalWrite(rLED, LOW) ;  // turn LED off
  Serial.println("NO Motion");