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Arduino Alarm System

w0lfiesmith Aug 15th, 2013 6,878 Never
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  1. #include <NewPing.h>
  2. #include <NewTone.h>
  3.  
  4. // Select which PWM-capable pins are to be used.
  5. #define RED_PIN    10
  6. #define GREEN_PIN   11
  7. #define BLUE_PIN  9
  8.  
  9. #define TRIGGER_PIN  6  // Arduino pin tied to trigger pin on the ultrasonic sensor.
  10. #define ECHO_PIN     7  // Arduino pin tied to echo pin on the ultrasonic sensor.
  11. #define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters).
  12.  
  13. NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
  14. boolean triggered = false;
  15.  
  16.  
  17. #define ALARM 3
  18. float sinVal;
  19. int toneVal;
  20.  
  21. void setup(){
  22.    
  23.  //set pinModes for RGB strip
  24.    pinMode(RED_PIN,OUTPUT);
  25.    pinMode(BLUE_PIN,OUTPUT);
  26.    pinMode(GREEN_PIN,OUTPUT);
  27.    
  28.    pinMode(ALARM, OUTPUT);
  29.  
  30.    //reset lights
  31.    analogWrite(RED_PIN,0);
  32.    analogWrite(BLUE_PIN,0);
  33.    analogWrite(RED_PIN,0);
  34.  
  35.   delay(5000);
  36. Serial.begin(115200); // Open serial monitor at 115200 baud to see ping results.  
  37.  
  38.  
  39. }
  40.  
  41. void loop(){
  42.     if(triggered == true){
  43.       alarm();
  44.     }
  45.     else{
  46.       delay(50);// Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
  47.       unsigned int uS = sonar.ping(); // Send ping, get ping time in microseconds (uS).
  48.       unsigned int distance = uS / US_ROUNDTRIP_CM;
  49.       Serial.println(distance);
  50.       if(distance < 50){
  51.          triggered = true;
  52.       }
  53.    }
  54. }
  55.  
  56. void alarm(){
  57.    color(255,0,0); //red
  58.    delay(100);
  59.    color(255,255,0); //yelow
  60.    delay(100);
  61.    
  62.    for (int x=0; x<180; x++) {
  63.     // convert degrees to radians then obtain sin value
  64.     sinVal = (sin(x*(3.1412/180)));
  65.     // generate a frequency from the sin value
  66.     toneVal = 2000+(int(sinVal*1000));
  67.     NewTone(ALARM, toneVal);
  68.   }
  69. }
  70.  
  71. //helper function enabling us to send a colour in one command
  72. void color (unsigned char red, unsigned char green, unsigned char blue)     // the color generating function
  73. {    
  74.     analogWrite(RED_PIN, red);    
  75.     analogWrite(BLUE_PIN, blue);
  76.     analogWrite(GREEN_PIN, green);
  77. }
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