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docs/esp8266/tutorial: Update neopixel with example of using 4 bbp.

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Gabe 2017-09-27 15:49:51 -04:00 committed by Damien George
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docs/esp8266/tutorial/neopixel.rst
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@ -20,6 +20,20 @@ To set the colour of pixels use::
>>> np[1] = (0, 128, 0) # set to green, half brightness
>>> np[2] = (0, 0, 64) # set to blue, quarter brightness
For LEDs with more than 3 colours, such as RGBW pixels or RGBY pixels, the
NeoPixel class takes a ``bpp`` parameter. To setup a NeoPixel object for an
RGBW Pixel, do the following::
>>> import machine, neopixel
>>> np = neopixel.NeoPixel(machine.Pin(4), 8, bpp=4)
In a 4-bpp mode, remember to use 4-tuples instead of 3-tuples to set the colour.
For example to set the first three pixels use::
>>> np[0] = (255, 0, 0, 128) # Orange in an RGBY Setup
>>> np[1] = (0, 255, 0, 128) # Yellow-green in an RGBY Setup
>>> np[2] = (0, 0, 255, 128) # Green-blue in an RGBY Setup
Then use the ``write()`` method to output the colours to the LEDs::
>>> np.write()