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Documentation Index

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WS2812 NeoPixel Compatible LED Matrix.

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Pin names

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DIN
pin
Data input signal
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VDD
pin
Positive voltage supply
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VSS
pin
Ground
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DOUT
pin
Data output (for chaining to next panel)

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Attributes

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rows
string
default:"8"
Number of rows
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cols
string
default:"8"
Number of columns
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layout
string
default:""
Pixel wiring pattern: "" (progressive) or “serpentine”
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brightness
string
default:"1"
Brightness multiplier
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pixelShape
string
default:""
Pixel rendering shape: “square”, “circle”, or "" (smooth)
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pixelSize
string
default:"5050"
LED package size: “5050”, “3535”, or “2020”

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Layout

The layout attribute controls how pixel indices map to physical positions in the matrix:
  • "" (default) - Progressive: all rows go left-to-right
  • "serpentine" - Alternating row direction (left-to-right, then right-to-left)
Most real-world WS2812 matrix panels use serpentine wiring.

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Pixel rendering

For pixel shape and size options, see wokwi-led-strip: Pixel rendering.

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Arduino code example

#include <Adafruit_NeoPixel.h>

#define MATRIX_PIN 2
#define ROWS 8
#define COLS 8
#define NUM_PIXELS (ROWS * COLS)

Adafruit_NeoPixel matrix(NUM_PIXELS, MATRIX_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  matrix.begin();
  for (int i = 0; i < NUM_PIXELS; i++) {
    matrix.setPixelColor(i, matrix.Color(0, 0, 150)); // Blue
  }
  matrix.show();
}

void loop() {
  delay(10);
}

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See also

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Simulator examples

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