Alarm Timer

1#include "LowPower.h"
2
3// set the corresponding snooze/off button   pin number
4const int buttonPin = 2; 
5
6// set the four corresponding LED   pin numbers
7const int ledPin1 = 4; 
8const int ledPin2 = 3;
9const int ledPin3   = 5;
10const int ledPin4 = 6; 
11
12// set the corresponding piezo buzzer pin
13const   int alarmPin = 9;
14
15// initialize timer variables
16int nappingTime = 0;
17String   strNappingTime = "";
18
19// initialize the snooze/off button state
20int buttonState   = 0;  
21
22void setup() {
23  // initialize the LED pins as outputs:
24  Serial.begin(9600);
25   pinMode(ledPin1, OUTPUT);
26  pinMode(ledPin2, OUTPUT);
27  pinMode(ledPin3,   OUTPUT);
28  pinMode(ledPin4, OUTPUT);
29  
30  // initialize the snooze button   pin as an input:
31  pinMode(buttonPin, INPUT);
32
33  // user inputs napping   time
34  Serial.println("How long do you want to set the timer for?");
35  while   (Serial.available() == 0) { }
36  strNappingTime = Serial.readString();
37  nappingTime   = strNappingTime.toInt();
38  delay (nappingTime * 60000);
39}
40
41void loop()   {
42  // after time is up, reads the state of the snooze button:
43  buttonState   = digitalRead(buttonPin);
44  
45  // checks to see if the snooze/off button is   pressed:
46  if (buttonState == LOW) {
47    // alarm rings
48    // LEDs flash
49     tone(alarmPin, 3000);
50    digitalWrite(ledPin1, HIGH);
51    digitalWrite(ledPin2,   HIGH);
52    digitalWrite(ledPin3, HIGH);
53    digitalWrite(ledPin4, HIGH);
54     delay (500);
55    noTone(alarmPin); 
56    digitalWrite(ledPin1, LOW);
57     digitalWrite(ledPin2, LOW);
58    digitalWrite(ledPin3, LOW);
59    digitalWrite(ledPin4,   LOW);
60    delay(500);
61  } 
62  
63  // if the snooze button is pressed
64   else {
65    // alarm stops
66    // turns LEDs off
67    noTone(alarmPin);   
68    digitalWrite(ledPin1, LOW);
69    digitalWrite(ledPin2, LOW);
70    digitalWrite(ledPin3,   LOW);
71    digitalWrite(ledPin4, LOW);
72    delay (1000);
73    // shuts down   until reset button is pressed
74    LowPower.powerDown(SLEEP_FOREVER, ADC_OFF,   BOD_OFF);
75  }
76}

1#include "LowPower.h"
2
3// set the corresponding snooze/off button  pin number
4const int buttonPin = 2; 
5
6// set the four corresponding LED  pin numbers
7const int ledPin1 = 4; 
8const int ledPin2 = 3;
9const int ledPin3  = 5;
10const int ledPin4 = 6; 
11
12// set the corresponding piezo buzzer pin
13const  int alarmPin = 9;
14
15// initialize timer variables
16int nappingTime = 0;
17String  strNappingTime = "";
18
19// initialize the snooze/off button state
20int buttonState  = 0;  
21
22void setup() {
23  // initialize the LED pins as outputs:
24  Serial.begin(9600);
25  pinMode(ledPin1, OUTPUT);
26  pinMode(ledPin2, OUTPUT);
27  pinMode(ledPin3,  OUTPUT);
28  pinMode(ledPin4, OUTPUT);
29  
30  // initialize the snooze button  pin as an input:
31  pinMode(buttonPin, INPUT);
32
33  // user inputs napping  time
34  Serial.println("How long do you want to set the timer for?");
35  while  (Serial.available() == 0) { }
36  strNappingTime = Serial.readString();
37  nappingTime  = strNappingTime.toInt();
38  delay (nappingTime * 60000);
39}
40
41void loop()  {
42  // after time is up, reads the state of the snooze button:
43  buttonState  = digitalRead(buttonPin);
44  
45  // checks to see if the snooze/off button is  pressed:
46  if (buttonState == LOW) {
47    // alarm rings
48    // LEDs flash
49    tone(alarmPin, 3000);
50    digitalWrite(ledPin1, HIGH);
51    digitalWrite(ledPin2,  HIGH);
52    digitalWrite(ledPin3, HIGH);
53    digitalWrite(ledPin4, HIGH);
54    delay (500);
55    noTone(alarmPin); 
56    digitalWrite(ledPin1, LOW);
57    digitalWrite(ledPin2, LOW);
58    digitalWrite(ledPin3, LOW);
59    digitalWrite(ledPin4,  LOW);
60    delay(500);
61  } 
62  
63  // if the snooze button is pressed
64  else {
65    // alarm stops
66    // turns LEDs off
67    noTone(alarmPin);  
68    digitalWrite(ledPin1, LOW);
69    digitalWrite(ledPin2, LOW);
70    digitalWrite(ledPin3,  LOW);
71    digitalWrite(ledPin4, LOW);
72    delay (1000);
73    // shuts down  until reset button is pressed
74    LowPower.powerDown(SLEEP_FOREVER, ADC_OFF,  BOD_OFF);
75  }
76}