A small ruby web service for controlling NeoPixels attached to a RaspberryPi.
Yes.
Clone the repository to your RaspberryPi, and install all the dependencies:
git clone https://github.com/TwP/pixelbot.git
cd pixelbot
script/bootstrapOpen the pixelbot.yml file in your favorite editor and set the number of
leds to the number of NeoPixels you have connected to your RaspberryPi. Set
the gpio pin number to match the GPIO pin where the NeoPixels are connected to
your RaspberryPi. Please read the RaspberryPi NeoPixel guide
from Adafruit for all the details on setting up your NeoPixel circuit.
To start the web service run:
sudo script/pixelbotEnjoy the blinkenlights!
Yes it will.
The ws2811 driver is using direct memory
addressing (DMA) via /dev/mem to control the NeoPixels. Only the root user has
permission to read and write to this hardware device. So any time your work with
NeoPixels, your code will need to be run as the super user.
You're in luck!
When running on an architecture other than linux-arm (the RaspberryPi
architecture), a fake LEDs class is used to simulate the NeoPixels. This set of
fake LEDs is provided by the pixel_pi gem,
and the fake LEDs are automatically used where needed.
The fake LEDs are displayed in the terminal using a UTF-8 fisheye "◉" character, and the fake LEDs are colorized using the rainbow gem. So you can work with the LEDs even when a RaspberryPi is not handy.
