Motion sensor alarm

1int ledPin = 13;  
2int nxtPinA = 11;
3int nxtPinB = 9;  // choose
4  the pin for the LED
5int inputPin = 2;               // choose the input pin (for
6  PIR sensor)
7int pirState = LOW;             // we start, assuming no motion detected
8int
9  val = 2;  
10int piezoPin = 12;
11          //Variable to store analog value (0-1023)
12
13  // variable for reading the pin status
14 
15void setup() {
16  pinMode(ledPin,
17  OUTPUT);
18  pinMode(piezoPin, OUTPUT); 
19  pinMode(nxtPinA, OUTPUT);
20  pinMode(nxtPinB,
21  OUTPUT);// declare LED as output
22  pinMode(inputPin, INPUT);     // declare sensor
23  as input
24 
25  Serial.begin(9600);
26
27}
28 
29void loop(){
30  val =
31  digitalRead(inputPin);  // read input value
32  if (val == HIGH) {            //
33  check if the input is HIGH
34    digitalWrite(ledPin, HIGH);
35    digitalWrite(nxtPinA,
36  HIGH);
37    digitalWrite(nxtPinB, HIGH);
38    digitalWrite(ledPin, HIGH);
39
40    tone(piezoPin, 1000, 500);
41    // turn LED ON
42    if (pirState == LOW)
43  {
44      // we have just turned on
45      Serial.println("Motion detected!");
46
47      // We only want to print on the output change, not state
48      pirState
49  = HIGH;
50    }
51  } else {
52    digitalWrite(ledPin, LOW);
53  
54    if
55  (pirState == HIGH){
56      // we have just turned of
57      Serial.println("Motion
58  ended!");
59      // We only want to print on the output change, not state
60
61      pirState = LOW;
62    }
63  }
64}
65

1int ledPin = 13;  
2int nxtPinA = 11;
3int nxtPinB = 9;  // choose  the pin for the LED
4int inputPin = 2;               // choose the input pin (for  PIR sensor)
5int pirState = LOW;             // we start, assuming no motion detected
6int  val = 2;  
7int piezoPin = 12;
8          //Variable to store analog value (0-1023)
9  // variable for reading the pin status
10 
11void setup() {
12  pinMode(ledPin,  OUTPUT);
13  pinMode(piezoPin, OUTPUT); 
14  pinMode(nxtPinA, OUTPUT);
15  pinMode(nxtPinB,  OUTPUT);// declare LED as output
16  pinMode(inputPin, INPUT);     // declare sensor  as input
17 
18  Serial.begin(9600);
19
20}
21 
22void loop(){
23  val =  digitalRead(inputPin);  // read input value
24  if (val == HIGH) {            //  check if the input is HIGH
25    digitalWrite(ledPin, HIGH);
26    digitalWrite(nxtPinA,  HIGH);
27    digitalWrite(nxtPinB, HIGH);
28    digitalWrite(ledPin, HIGH);
29    tone(piezoPin, 1000, 500);
30    // turn LED ON
31    if (pirState == LOW)  {
32      // we have just turned on
33      Serial.println("Motion detected!");
34      // We only want to print on the output change, not state
35      pirState  = HIGH;
36    }
37  } else {
38    digitalWrite(ledPin, LOW);
39  
40    if  (pirState == HIGH){
41      // we have just turned of
42      Serial.println("Motion  ended!");
43      // We only want to print on the output change, not state
44      pirState = LOW;
45    }
46  }
47}
48