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Version vom 16. Januar 2019, 18:49 Uhr von Maxvalue (Diskussion | Beiträge) (added information about current version of the light switch)
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U blue.jpg
U pink.jpg

Umbrella is the ceiling lighting of the main room. It consist out of 12 umbrellas capable of emitting light in either 16581375 RGB shades or 65025 white shades.

The umbrellas are controllable with art-net.

How to simply turn on/off the light

Use the light switch next to the kitchen. You can dim the light with the rotary knob on the side.

Umbrella lightswitch 1.jpg Umbrella lightswitch 2.jpg

If it does not work just power cycle it. Wait a couple of seconds.

Metalab school of software resilience(tm) :)

New Version

Out of good reasons, we upgraded the light switch to a much more powerful version.

This light switch has 4 buttons:

  • the "Mode" button on the side, surrounded by multiple light-ray-resembling lines. This button switches between different light modes for the umbrella-lights.
  • the "Reset" button on the other side, surrounded by an arrow revolving around it. If the switch doesn't work anymore, it can be restarted using this button. Wait a few seconds after pressing it shortly.
  • the "+" or "Brightness Up" button on top. This button increases the brightness of the umbrella-lights in all modes, except in party mode. For that mode, it increases the blinking speed.
  • the "-" or "Brightness Down" button on top. This button decreases the brightness of the umbrella-lights in all modes, except in party mode. For that mode, it decreases the blinking speed.

Each button is to pressed shortly. For example: Holding one of the brightness-buttons does not result in a repeated button press. Short is key.

This light switch has several modes:

  • All Red (#F00)
  • All Lime (#0F0)
  • All Blue (#00F)
  • All Yellow (#FF0)
  • All Fuchsia (=Pink) (#F0F)
  • All Aqua (=Cyan) (#0FF)
  • All RGB White (RGB to 100%) (#FFF)
  • All Warm White
  • All Cold White
  • All Warm and Cold White
  • Party mode: All lights blink in different colors individually

Access data

Wlan SSID: metalights

Protocol: art-net


startUniverse: 3

There are 60 channel, 5 channels (RGBWW) per umbrella.


The Metalab needed some new lights.

ART-net is awesome.


Raspberry Pi 3 + Touchscreen

Distro based on the QLC+ image (raspbian jessie)

QLC+ XServer less build that renders directly in GL buffers for performance

H801 based clients (ESP8266)

Arduino based firmware that implements ART-net

Temporary setup with QLC+

Connect to "metalights" WLAN


Set ARTnet universe to 3

There are 5 channels / Umbrella


If CW or WW are anything else but "0" then R,G and B are disabled by firmware.

If R,G or B are anything but "0" then CW and WW are disabled by firmware.

This is to save our power supplies from sudden heat death.

(105 watt / Umbrella max)


H801 LED controller features:

  • 8 Mbit Storage (1 Mb)
  • 5 channels each 45 watt max (~ 3.5 Ampere @ 12 V / channel)

How to flash

  • Install Arduino IDE
  • Install ESP 8266 extensions
  • Choose generic ESP8266 Board under Tools->Board
  • Settings for ESP8266:
    Umbrella address.png
    • GENERIC ESP8266 Module
    • Flash Mode: DIO
    • Flash Size: 1M (512K SPIFFS)
    • Debug Port: Disabled
    • Debug Level: none
    • Reset Mode: ck
    • Flash Frequency: 40 MHz
    • CPU Frequency: 80 MHz
    • Upload Speed: 115200 or more

  • U need a USB-to-UART-board (set to 3.3V)
  • Connect GND to GND; RX to TX(!) and TX to RX(!); DO NOT CONNECT 3.3V!
  • Set JUMPER on board to boot into flash mode. (Important! Has to be set before power is connected, so board gets into flashing mode.)
  • Supply power via VCC & GND (12V should be adequate)

The code to flash can be found in the github repo. If you want to flash exactly this code (and what else would you flash in the main room), you will need these libraries:


Originally invented and built by overflo, the umbrellas were built by a lot of people in some night shifts at Metalab

LOTS OF SUPPORT BY uniq, anlumo, ripper, bogdan <your name here>


Neue Fixture: Datei:Hauptraum setup.qxw.txt (das muss nach ~/.qlcplus/fixtures/hauptraum-setup.qxf)

Fixture: Datei:Metalab-Umbrella.txt (das muss nach ~/.qlcplus/fixtures/Metalab-Umbrella.qxf)

Demo Desk: Datei:Test.txt



H801 Controllers


ART-net Reference


A Python implementation to control the umbrellas