// NeoPixel Ring simple sketch (c) 2013 Shae Erisson
// Released under the GPLv3 license to match the rest of the
// Adafruit NeoPixel library

#include <Adafruit_NeoPixel.h>

// Which pin on the Arduino is connected to the NeoPixels?
#define PIN        15 // On Trinket or Gemma, suggest changing this to 1

int buttonState = 0;
int button=2;
// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 17 // Popular NeoPixel ring size
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

//FOR ULTRASONIC
const int trigPin = 5;
const int echoPin = 18;
//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701
long duration;
float distanceCm;
float distanceInch;
//


void setup() {

  //FOR ULTRASONIC
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  //


  pinMode(button, INPUT);
  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
  Serial.begin(115200);

  for(int i=0; i<NUMPIXELS; i++) 
  { // For each pixel...
    pixels.setPixelColor(i, pixels.Color(255, 255, 255));
  }
  pixels.show();
  
}

void pixelson(){
  for(int i=0; i<NUMPIXELS; i++) 
    { // For each pixel...
      pixels.setPixelColor(i, pixels.Color(0, 0, 0));
    }
  pixels.show();   // Send the updated pixel colors to the hardware.

}

void loop() {
   buttonState = digitalRead(button);
  if(buttonState == HIGH){ //ir sensor does not detect motion
    Serial.println("ON");
    //Serial.println(buttonState);
    //pixelson();
  }

  //FOR ULTRASONIC
  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
  if (distanceCm < 15.00){
    pixelson();
    Serial.println("less than 15");
  }

  
  
}