bneijt / wifipond

RGB led light-up based on wifi MAC address

Wifi pond

A square of programmable RGB WS2812B LEDS connected to a Wifi sniffer to assign every MAC address a flicker of light.

Status: shining bright from a dark and damp code base

Hardware

• WEMOS D1 mini board
• An 8x8 array of WS2812B leds
• A beefy 5V 6A adapter to allow the LEDS to shine
• A frame to put it all in
• Some baking paper, to dissipate the light a bit
• A 2.5mm DC jack to connect up the power supply nicely
• A button, one will do but I ended up buying a collection of different buttons

Connections

On the WEMOS D1:

• Connected D2 to the RGB led DIN (Data In) line
• Connected GND to the ground of the 5V
• Connected 5V to 5V power supply
• Put simple push-button between 3.3V and D8. D8 has a build-in pull-down 10K resistor, so direct connection should not be a problem

On the LED array:

• Desolder one of the connectors, the data out one, and re-use it to connect up the WEMOS on the other end.
• Connect up the 5V and GND lines just to make sure enough amps can go to either side of the strip (probably pointless, but I liked the extra soldering)

On the frame, make a few holes and put in the led array.

Software

• Arduino IDE with
  • The Adafruit NeoPixel library, installed via IDE library manager
  • The ESP8266WiFi library, installed via IDE library manager
  • The WEMOS D1 compiler and configuration setup
• The wifipond.ino file from this repository

Result

https://drive.google.com/open?id=1LEcKE2glpTXbk8xvIVeoEQVKUeSSFgIa