Motion Detecting

1int led = 13;                // the pin that the LED is atteched to
2int  sensor = 2;              // the pin that the sensor is atteched to
3int state  = LOW;             // by default, no motion detected
4int val = 0;                 //  variable to store the sensor status (value)
5
6void setup() {
7  pinMode(led,  OUTPUT);      // initalize LED as an output
8  pinMode(sensor, INPUT);    // initialize  sensor as an input
9  Serial.begin(9600);        // initialize serial
10}
11
12void  loop(){
13  val = digitalRead(sensor);   // read sensor value
14  if (val == HIGH)  {           // check if the sensor is HIGH
15    digitalWrite(led, HIGH);   //  turn LED ON
16    delay(100);                // delay 100 milliseconds 
17    
18    if (state == LOW) {
19      Serial.println("Motion detected!"); 
20      state  = HIGH;       // update variable state to HIGH
21    }
22  } 
23  else {
24      digitalWrite(led, LOW); // turn LED OFF
25      delay(200);             //  delay 200 milliseconds 
26      
27      if (state == HIGH){
28        Serial.println("Motion  stopped!");
29        state = LOW;       // update variable state to LOW
30    }
31  }
32}
33

1int led = 13;                // the pin that the LED is atteched to
2int
3  sensor = 2;              // the pin that the sensor is atteched to
4int state
5  = LOW;             // by default, no motion detected
6int val = 0;                 //
7  variable to store the sensor status (value)
8
9void setup() {
10  pinMode(led,
11  OUTPUT);      // initalize LED as an output
12  pinMode(sensor, INPUT);    // initialize
13  sensor as an input
14  Serial.begin(9600);        // initialize serial
15}
16
17void
18  loop(){
19  val = digitalRead(sensor);   // read sensor value
20  if (val == HIGH)
21  {           // check if the sensor is HIGH
22    digitalWrite(led, HIGH);   //
23  turn LED ON
24    delay(100);                // delay 100 milliseconds 
25    
26
27    if (state == LOW) {
28      Serial.println("Motion detected!"); 
29      state
30  = HIGH;       // update variable state to HIGH
31    }
32  } 
33  else {
34
35      digitalWrite(led, LOW); // turn LED OFF
36      delay(200);             //
37  delay 200 milliseconds 
38      
39      if (state == HIGH){
40        Serial.println("Motion
41  stopped!");
42        state = LOW;       // update variable state to LOW
43    }
44
45  }
46}
47