IDeATe

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exercise 1:

Light up pixel by pixel then reverse the sequence turning each pixel off one by one.

#include "neopixel.h"
// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup() {
    
    strip.begin();
    strip.show(); // Initialize all pixels to 'off'
}

void loop() {
    
    // here is to light up the pixel one by one
    
    uint16_t i;
    uint32_t c = strip.Color(0, 0, 255); //blue

    for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c );
		strip.show();
		delay( 100 );
    }
	
	delay( 100 );
	
	// here is to turn off the pixel one by one
	
	for(i=strip.numPixels(); i > 0; i--) {
        strip.setPixelColor(i, 0 );
		strip.show();
		delay( 100 );
    }

	delay( 100 );

}

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exercise 2:

light up blue, then red, then green then white in sequence .

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#include "neopixel.h"
// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812
 
Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup() {
    
    strip.begin();
    strip.show(); // Initialize all pixels to 'off'
}

void loop() {
    
    // here is to light up the pixel one by one
    
    uint16_t i;
    uint32_t c = strip.Color(0, 0, 255); //blue

    for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c );
    }
    
	strip.show();
	delay( 100 );
	
	c = strip.Color(255, 0, 0); //red
	for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c );
    }
    
	strip.show();
	delay( 100 );
	
	c = strip.Color(0, 255, 0); //green
	for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c );
    }
    
	strip.show();
	delay( 100 );
	
	c = strip.Color(255, 255, 255); //white
	for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c );
    }
    
	strip.show();
	delay( 100 );
	
    }

	delay( 100 );

}

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Exercise3:

Change the code to only light up only one pixel at a time. With each loop move that pixel one position higher. When it reaches the final pixel, restart the sequence at zero

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#include "neopixel.h"
// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812
 
Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup() {
    
    strip.begin();
    strip.show(); // Initialize all pixels to 'off'
}

void loop() {
    
    // here is to light up the pixel one by one
    
    uint16_t i;
    uint32_t c = strip.Color(0, 0, 255); //blue

    for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c);
        strip.show();
        delay(100);
        strip.setPixelColor(i, 0);
    }
    
	delay( 100 );

}

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Exercise4:

Add three Particle.function to set the Red, Green and Blue components. Allow these values to be set from 0-255 and as they are set to change all of the pixels on the LED strip to that color.

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#include "neopixel.h"
// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 16
#define PIXEL_TYPE WS2812
 
Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);
int red = 0;
int green = 0;
int blue = 0;

void setup() {
    
    strip.begin();
    strip.show(); // Initialize all pixels to 'off'
    Particle.function("red", setRed);
    Particle.function("green", setGreen);
    Particle.function("blue", setBlue);
    
}

void loop() {
    
    uint16_t i;
    uint32_t c = strip.Color(red, green, blue); //set the color

    for(i=0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, c);
    }
    
    strip.show();
	delay( 100 );
    
}

int setRed(String cmd) {
    
    int redInput = cmd.toInt();
    if(redInput >= 0 and redInput <= 255){
        red = redInput;
    }else{
        return -1;
    }
    return 1;
}

int setGreen(String cmd) {
    
    int greenInput = cmd.toInt();
    if(greenInput >= 0 and greenInput <= 255){
        green = greenInput;
    }else{
        return -1;
    }
    return 1;
}

int setBlue(String cmd) {
    
    int blueInput = cmd.toInt();
    if(blueInput >= 0 and blueInput <= 255){
        blue = blueInput;
    }else{
        return -1;
    }
    return 1;
    
}

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