Control Two Adafruit NeoPixels Simultaneously
This example shows how to use the MATLAB® Support Package for Arduino® Hardware to control two Adafruit NeoPixel LED Strips simultaneously.
- Arduino Uno board
- Adafruit NeoPixel RGB Strip with 30 pixels
- Adafruit NeoPixel RGBW Strip with 60 pixels
- External 5V power supply
- 1000uF capacitor
- Connect DIN pin on NeoPixel RGB strip to D6 on Arduino board.
- Connect DIN pin on NeoPixel RGBW strip to D7 on Arduino board.
- Connect VCC, GND pin to external 5V power supply (recommended current rating of 5 Amp or more for this example).
- Connect 1000uF capacitor between the power supply terminals to supress voltage spikes.
Create Arduino Instance
Create Arduino object
Create NeoPixel objects
Write the Colors to Produce Gradient Effect
Define desired colorMaps
The returns an array of RGB values that represent gradually changing colors from one color to another. The use of the function creates a rainbow effect, while the function has various contrast colors. Note that we must append to because the second strip is a RGBW strip, while the function returns RGB values only.
Iteratively update colors
As the number of pixels (30 or 60) is less than the number of selected colors (i.e. 255), using we can show all the colors from colors1 and colors2 on respective NeoPixel strips by circularly shifting the color window.
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