Wipy-LoPy-MicroPython WS2812 driver

Wipy-LoPy-MicroPython driver for WS2812, WS2812B, and compatible RGB LEDs. These are popular RGB LEDs used for example in AdaFruit NeoPixels rings, strips, boards, etc.

Driver has been tested with up to 16 LEDs (for now) but it should work with much more LEDs.

Installation

Copy ws2812.py file to your pyboard.

Usage

from ws2812 import WS2812
chain = WS2812( ledNumber=4, dataPin='P22' )
data = [
    (255, 0, 0),    # red
    (0, 255, 0),    # green
    (0, 0, 255),    # blue
    (85, 85, 85),   # white
]
chain.show(data)

Wiring

WS2812 driver is using SPI bus. Connect your LED's input wire to the SPI bus 0, MOSI is

• WiPy/LoPy: pin P11 (G22 on extension board)

Connect LED's power and ground wires to VIN and GND. The same applies for LED rings, stripes, etc. (they have always one input wire).

USB may be insufficient for powering lots of RGB LEDs. You may need to use additional power source.

More info & Help

Due to a firmware update the library was not working anymore for the LoPy (> 1.9.0b1). This new version treats the SPI the same way on the LoPy as on the WiPy which worked fine for me on at least 16LEDs. This library might not be compatible with older LoPy firmware versions.

You can check more about the MicroPython project here: http://micropython.org

Discussion about this driver: http://forum.micropython.org/viewtopic.php?f=5&t=394

Changelog

• 1.2 - Added support for LoPy with new firmware versions.
• 1.1 - Add support for LoPy.
• 1.0 - First release.

Credit

Based on : https://github.com/Gadgetoid/wipy-WS2812