A 5 meter NeoPixel strip should light up the room.
The first pixel shows is calculated based on something (loudliness in the room, incoming bandwidth, …)
Over time the pixels move to the next and create a pattern based real life events.

A ESP8266 will control the strip and will accept commands over WiFi (UDP)
One UDP port will accept the json data for the current situation. It will also handle the pixel scrolling.
Every client on the network is able to send data to it and impact the mood light.
Light wars incoming!

The ESPP8266 board is a NodeMCU Amica

Depending on your OS you might need a driver.
MacOS caused the most trouble. First you need to make sure to identify the hardware.

• Boot Linux
• plugin USB cable from the NodeMCU
• dmesg

• ... usb 1-2: new full-speed USB device number 7 using uhci_hcd
  ... usb 1-2: New USB device found, idVendor=10c4, idProduct=ea60
  ... usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  ... usb 1-2: Product: CP2102 USB to UART Bridge Controller
  ... usb 1-2: Manufacturer: Silicon Labs
  ... cp210x 1-2:1.0: cp210x converter detected

In this case MacOS needs a driver

• https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
• sudo kextload /Library/Extensions/SiLabsUSBDriver.kext
• ls /dev | grep SLAB
  • > cu.SLAB_USBtoUART
  • > tty.SLAB_USBtoUART

• Preferences
  • Additional Board Manager URLs: http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Tools → Board → Board Manager
  • add esp8266
• Sketch → Include Library → Manage Libraries
  • Adafruit NeoPixel

Todo

• Tools → Board
  • NodeMCU 0.9 (ESP-12 Module)
• Tools → CPU
  • 80 MHz
• Tools → Flash
  • 4M (3M SPIFFS)
• Tools → Upload Speed
  • 115200
• Tools → Port
  • /dev/cu.SLAB_USBtoUART

The ESP8266 with an Arduino Core provieds a possibility for a OverTheAir Update.

http://esp8266.github.io/Arduino/versions/2.0.0/doc/ota_updates/ota_updates.html

#!/bin/bash
IP=192.168.x.x
PORT=2342
for i in 16 48 96 256 128 64 32 16 1
do
   echo led intensity: $i
   echo "{red:$i,green:1,blue:1}"   | nc -w 0 -u $IP $PORT ; sleep 1
   echo "{red:1,green:$i,blue:1}"   | nc -w 0 -u $IP $PORT ; sleep 1
   echo "{red:1,green:1,blue:$i}"   | nc -w 0 -u $IP $PORT ; sleep 1
   echo "{red:$i,green:$i,blue:$i}" | nc -w 0 -u $IP $PORT ; sleep 1
done

Todo