Booth

Booth Controller

Using ~1000 NeoPixels with FastLED library we are controlling a custom built DJ booths lighting. The NeoPixels are organzied into rectangles on a DJ of which the light difuses around the rectnagle. This is using the SAMD21 broken out via the arduino nano 33 iot board.

Code Organization

• booth_controller contains the arduino sketch
  • booth_controller.ino
    • instantiates the DMX receiver very inspired by this library
    • instantiates the custom LightingArrayController object
    • overrides the standard Serial1 handler SERCOM5 to specifically parse DMX inputs from the RS485 transciever
    • sets up the dmx object and light controller
    • grabs dmx data and passes it to the light controller to map to rectangles
  • lighting_array_controller
    • note in both .h and .cpp file there is auto generated code parsed from the csv that keeps the rectangles aligned with reality. See rect_gen.py for more.
    • important holds array of CRGB leds from FastLED
    • handles business logic of holding array of rectangles and passing dmx channels to their relevant rectangle
    • critically calls FastLED.show()
  • rectangle
    • mechanisim to map global array of LEDs to given logical rectangle
    • has rectangle specific dmx_update mechanism which takes mapped dmx channels and translates to LED CRGB values
  • dmx
    • does dmx things, neat protocol. thanks to claudeheintz
• requirements.txt, rect_gen.py, rects.csv
  • all convinience things for autogenerating cpp code to map the rectangles
• Makefile
  • compile - compiles 'primary' and 'secondary' to cover both arduinos
  • deploy_[primary, secondary] - deploys relevant binary to MCU

TODO attach pictures it looks sweet take my word for it for now.

Notes:

Added: void SERCOM5_Handler() __attribute__((weak)); to the relevant variants.cpp file such that I could overwrite the SERCOM5 handler being used for Serial1 to parse out the DMX messages

It seems my one nano was just not powerful enough to write to all 1000+ LEDs, I put another on the DMX bus and mapped it to the channels my first couldn't meet.