Adafruit CircuitPython NeoPixel¶
Higher level NeoPixel driver that presents the strip as a sequence. This is a
supercharged version of the original MicroPython driver. Its now more like a
normal Python sequence and features slice support, repr and len support.
Colors are stored as tuples by default. However, you can also use int hex syntax
to set values similar to colors on the web. For example, 0x100000 (#100000
on the web) is equivalent to (0x10, 0, 0).
Note
The int hex API represents the brightness of the white pixel when present by setting the RGB channels to identical values. For example, full white is 0xffffff but is actually (0, 0, 0, 0xff) in the tuple syntax. Setting a pixel value with an int will use the white pixel if the RGB channels are identical. For full, independent, control of each color component use the tuple syntax.
Dependencies¶
This driver depends on:
Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.
Installing from PyPI¶
On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:
pip3 install adafruit-circuitpython-neopixel
To install system-wide (this may be required in some cases):
sudo pip3 install adafruit-circuitpython-neopixel
To install in a virtual environment in your current project:
mkdir project-name && cd project-name
python3 -m venv .env
source .env/bin/activate
pip3 install adafruit-circuitpython-neopixel
Usage Example¶
This example demonstrates the library with the single built-in NeoPixel on the Feather M0 Express and Metro M0 Express.
import board
import neopixel
pixels = neopixel.NeoPixel(board.NEOPIXEL, 1)
pixels[0] = (10, 0, 0)
This example demonstrates the library with the ten built-in NeoPixels on the
Circuit Playground Express. It turns
off auto_write so that all pixels are updated at once when the show
method is called.
import board
import neopixel
pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, auto_write=False)
pixels[0] = (10, 0, 0)
pixels[9] = (0, 10, 0)
pixels.show()
This example demonstrates using a single NeoPixel tied to a GPIO pin and with
a pixel_order to specify the color channel order. Note that bpp does not
need to be specified as it is computed from the supplied pixel_order.
import board
import neopixel
pixel = neopixel.NeoPixel(board.D0, 1, pixel_order=neopixel.RGBW)
pixel[0] = (30, 0, 20, 10)
Contributing¶
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.
Documentation¶
For information on building library documentation, please check out this guide.