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,
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,
on the web) is equivalent to
(0x10, 0, 0).
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.
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 .venv source .venv/bin/activate pip3 install adafruit-circuitpython-neopixel
import board import neopixel pixels = neopixel.NeoPixel(board.NEOPIXEL, 1) pixels = (10, 0, 0)
This example demonstrates the library with the ten built-in NeoPixels on the
Circuit Playground Express. It turns
auto_write so that all pixels are updated at once when the
method is called.
import board import neopixel pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, auto_write=False) pixels = (10, 0, 0) pixels = (0, 10, 0) pixels.show()
This example demonstrates using a single NeoPixel tied to a GPIO pin and with
pixel_order to specify the color channel order. Note that
bpp does not
need to be specified as it is computed from the supplied
import board import neopixel pixel = neopixel.NeoPixel(board.D0, 1, pixel_order=neopixel.RGBW) pixel = (30, 0, 20, 10)
Setup for sudo-less usage on Raspberry Pi boards¶
Enable both SPI and Serial port hardware (Serial interface). Do it by
raspi-configtool or manually by adding
Reboot the Pi to apply the changes - the hardware setup takes place during boot.
Connect LED’s DIN to
GPIO10(physical pin 19)
When initializing the
NeoPixel object always do it with
import board import neopixel DATA_PIN = board.D10 pixel = neopixel.NeoPixel(DATA_PIN, ...)
Now you can execute the code using
API documentation for this library can be found on Read the Docs.
For information on building library documentation, please check out this guide.
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.