Merge branch 'master' of https://repos.ctdo.de/ctdo/esp-pixelbox

Readme.md

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+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](#color)|
+|`device_id`/pixel/pixels/|Range property from 0 - (number of pixels - 1)|yes|Color as #xxxxxx without spaces [Color](#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](#effect-colors)|yes|Color as uint32_t see [Color](#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](#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:
+```shell
+function rgbToColor {   
+  echo $(( $(($1<<16)) + $(($2<<8)) + $(($3))  ));
+}
+
+function colorToRGB {
+  echo "Red:    $(($1>>16&0xff))"
+  echo "Green:  $(($1>>8&0xff))"
+  echo "Blue:   $(($1&0xff))"
+}
+
+```
+#### Example
+RGB Value to color uint32_t
+```shell
+  bash$ rgbToColor 155 230 32
+  10216992
+  bash$
+```
+uint32_t to RGB values
+```shell
+  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*