Datasheet

The first line assigns a number to the symbol “PIN” for later reference. It doesn’t need to be done

this way, but makes it easier to change the pin where the NeoPixels are connected without digging

deeper into the code.

The last line declares a NeoPixel object. We’ll refer to this by name later to control the strip of pixels.

There are three parameters or arguments in parenthesis:

1. The number of sequential NeoPixels in the strip. In the example this is set to 60, equal to 1

meter of medium-density strip. Change this to match the actual number you’re using.

2. The pin number to which the NeoPixel strip (or other device) is connected. Normally this

would be a number, but we previously declared the symbol PIN to refer to it by name here.

3. A value indicating the type of NeoPixels that are connected. In most cases you can leave

this off and pass just two arguments; the example code is just being extra descriptive. If

you have a supply of classic “V1” Flora pixels, those require NEO_KHZ400 + NEO_RGB to be

passed here.

Then, in the setup() function, call begin() to prepare the data pin for NeoPixel output:

The second line, strip.show(), isn’t absolutely necessary, it’s just there to be thorough. That function

pushes data out to the pixels…since no colors have been set yet, this initializes all the NeoPixels to

an initial “off” state in case some were left lit by a prior program.

#define PIN 6

// Parameter 1 = number of pixels in strip

// Parameter 2 = pin number (most are valid)

// Parameter 3 = pixel type flags, add together as needed:

// NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)

// NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)

// NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)

// NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)

Adafruit_NeoPixel strip = Adafruit_NeoPixel(60, PIN, NEO_GRB + NEO_KHZ800);

For through-hole 8mm NeoPixels, use NEO_RGB instead of NEO_GRB in the strip

declaration.

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void setup() {

strip.begin();

strip.show(); // Initialize all pixels to 'off'

}