Pixelbox Firmware

About

Features

LED 8x8 Field

Topic	Descriptions	settable	Values
device_id/pixel/pixel/	Range property from 0 - (number of pixels - 1)	yes	Color as uint32_t see Color
device_id/pixel/pixels/	Range property from 0 - (number of pixels - 1)	yes	Color as #xxxxxx without spaces Color
device_id/pixel/vu/	Range property from 0 - sqrt(number of pixels)-1	yes	sqrt(number of pixels) numbers, ranged 0-7
device_id/pixel/color	Range property to set the effects colors 1 & 2 see: effect colors	yes	Color as uint32_t see Color
device_id/pixel/brightness	Sets the brightness of the pixel strip	yes	possible values: 0 - 255
device_id/pixel/effect	Set effect	yes	see: effects
device_id/pixel/clear	Clears the pixels strip	yes	any value is possible
device_id/pixel/length	Set the strip length	yes	Possible values: 0 - length
device_id/pixel/icon	Show the icon represented by given letter	yes	Possible values: a - Z

Color

To convert RGB value use the following bash code:

function rgbToColor {   
  echo $(( $(($1<<16)) + $(($2<<8)) + $(($3))  ));
}

function colorToRGB {
  echo "Red:    $(($1>>16&0xff))"
  echo "Green:  $(($1>>8&0xff))"
  echo "Blue:   $(($1&0xff))"
}

Example

RGB Value to color uint32_t

  bash$ rgbToColor 155 230 32
  10216992
  bash$

uint32_t to RGB values

  bash$ colorToRGB 10216992
  Red:    155
  Green:  230
  Blue:   32
  bash$

Effects

• larsonspiral Shows the moving larson scanner eye known form Battlestar Galactica and Knight Rider. The used effect color can be specified by color_0
• randomscanner This is the same scanner then the scanner above but uses an alternating color pattern
• larsonspiral This is the same scanner then the randomscanner above but uses a spiral pattern
• rainbowcycle Shows a cycling rainbown on the LED strip
• theaterchase Shows an color chasing LED strip. You can specify the color by set color_0 and color_1
• fade Fades from effect color_0 to effect_color_1
• randomfade Fades thru an alternating color pattern on all pixels with the same color.
• randomfade|40 Fades thru an alternating color pattern on all pixels with different color.
• random Shows random static colors on all pixels differently.
• smooth Smooth chainging effect.
• plasma The all famous plasma effect known from many 8bit-Demos from the '80s and '90s.
• none Stop all effects

Effect colors

You can set to different effect colors

• color_0 (default R: 255, G: 0 B: 0)
• color_1 (default R: 0, G: 0 B: 255)

The effect color has to be set after the effect.

Example:

1. homie/device_id/pixel/effect/set -m "fade"
2. homie/device_id/pixel/color_0/set -m "255"
3. homie/device_id/pixel/color_1/set -m "10216992"

color_0

This color will be used for the following effects:

• scanner
• theaterchase
• fade

color_1

This color will be used for the following effects:

• theaterchase
• fade