PIR Motion Controlled Relay Using Arduino Nano!

1/*
2* PIR sensor tester
3*/
4 
5int relayPin = 3; // choose the
6  pin for the relay
7int pirSensorPin = 2; // choose the input pin (for PIR sensor)
8int
9  pirState = true; // we start, assuming no motion detected
10int val = 0; // variable
11  for reading the pin status
12int minimummSecsLowForInactive = 5000; // If the sensor
13  reports low for
14// more than this time, then assume no activity
15long unsigned
16  int timeLow;
17boolean takeLowTime;
18 
19//the time we give the sensor to calibrate
20  (10-60 secs according to the datasheet)
21int calibrationTime = 30;
22 
23void
24  setup() {
25pinMode(relayPin, OUTPUT); // declare LED as output
26pinMode(pirSensorPin,
27  INPUT); // declare sensor as input
28 
29Serial.begin(9600);
30 
31//give the
32  sensor some time to calibrate
33Serial.print("calibrating sensor ");
34for(int
35  i = 0; i < calibrationTime; i++){
36Serial.print(".");
37delay(1000);
38}
39Serial.println("
40  done");
41Serial.println("SENSOR ACTIVE");
42delay(50);
43}
44 
45void loop(){
46
47  
48val = digitalRead(pirSensorPin); // read input value
49if (val == HIGH) {
50  // check if the input is HIGH
51  
52digitalWrite(relayPin, HIGH); // turn LED
53  ON
54if (pirState) {
55// we have just turned on
56pirState = false;
57Serial.println("Motion
58  detected!");
59// We only want to print on the output change, not state
60delay(50);
61}
62takeLowTime
63  = true;
64} 
65
66else {
67digitalWrite(relayPin, LOW); // turn LED OFF
68
69  
70if (takeLowTime){
71timeLow = millis();
72takeLowTime = false;
73}
74 
75if(!pirState
76  && millis() - timeLow > minimummSecsLowForInactive){
77pirState = true;
78Serial.println("Motion
79  ended!");
80delay(50);
81}
82 
83}
84}
85

1/*
2* PIR sensor tester
3*/
4 
5int relayPin = 3; // choose the  pin for the relay
6int pirSensorPin = 2; // choose the input pin (for PIR sensor)
7int  pirState = true; // we start, assuming no motion detected
8int val = 0; // variable  for reading the pin status
9int minimummSecsLowForInactive = 5000; // If the sensor  reports low for
10// more than this time, then assume no activity
11long unsigned  int timeLow;
12boolean takeLowTime;
13 
14//the time we give the sensor to calibrate  (10-60 secs according to the datasheet)
15int calibrationTime = 30;
16 
17void  setup() {
18pinMode(relayPin, OUTPUT); // declare LED as output
19pinMode(pirSensorPin,  INPUT); // declare sensor as input
20 
21Serial.begin(9600);
22 
23//give the  sensor some time to calibrate
24Serial.print("calibrating sensor ");
25for(int  i = 0; i < calibrationTime; i++){
26Serial.print(".");
27delay(1000);
28}
29Serial.println("  done");
30Serial.println("SENSOR ACTIVE");
31delay(50);
32}
33 
34void loop(){
35  
36val = digitalRead(pirSensorPin); // read input value
37if (val == HIGH) {  // check if the input is HIGH
38  
39digitalWrite(relayPin, HIGH); // turn LED  ON
40if (pirState) {
41// we have just turned on
42pirState = false;
43Serial.println("Motion  detected!");
44// We only want to print on the output change, not state
45delay(50);
46}
47takeLowTime  = true;
48} 
49
50else {
51digitalWrite(relayPin, LOW); // turn LED OFF
52  
53if (takeLowTime){
54timeLow = millis();
55takeLowTime = false;
56}
57 
58if(!pirState  && millis() - timeLow > minimummSecsLowForInactive){
59pirState = true;
60Serial.println("Motion  ended!");
61delay(50);
62}
63 
64}
65}
66