Utils to create and send byte packet with pixels to RPI SPI output to drive sk9822 IC LEDs and UDP listener for LedMapper app
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NNNNNNNN|NNNNNNNN|NNNNNNNN|NNNNNNNN|FFFFFFFF|FFFFFFFF|RRRRRRRR|GGGGGGGG|BBBBBBBB|RRRRRRRR|GGGGGGGG..
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led count in | led count in | end of header | pixels
channel 1 (16bit)|channel 2 (16bit)|