Nuanced_Spikes

Components

Shoes

Bill of Materials

Per Shoe

• 32x 4-pin addressable RGB LEDs, WS2811 chip architecture, RGB color order - pin diagram below
• D1 mini esp382 wifi microcontroller
• 1Ah lipo
• switch
• lipo charger + conversion to 5V power circuit (We used PowerBoost 1000C)
• Some sort of accelerometer (the LIS3DH)

Wiring connection list

This table shows what pins are connected to each other. Pin labels on the same row are all connected to each other/are the same node.

D1 Mini	LIS3DH	Ultrasonic	LED1	PowerBoost100C	Battery	Switch
5V	Vin	VCC	Vin	5V	-------	------
G	GND	Gnd	GND	GND	-------	Pin 1
D1	SCL	----------	----	--------------	-------	------
D2	SDA	----------	----	--------------	-------	------
D5	------	TRIG	----	--------------	-------	------
D6	------	ECHO	----	--------------	-------	------
D7	------	----------	Din	--------------	-------	------
-------	------	----------	----	Bat	Vout	------
-------	------	----------	----	--------------	GND	Common

LED Pinout diagram

This pinout diagram is for our WS2811-style RGB LEDs

   _________
 /           \
|             |
|             |
______________
 |   |   |   |
 |   |   |   |
 |   |   |   |
Din  |   |  Dout
    GND  |
        VCC

Microcontroller Code Packages and Setup

We used the Arduino IDE for programming the D1 Minis.

D1 mini board is the WeMos D1 R2 & mini board from the esp8266 boards manager that we get from the additonal boards manager URL: https://arduino.esp8266.com/stable/package_esp8266com_index.json. Additional details can be found here.

The board we are using can be found in Aruduino under Tools->Board->esp8266->LOLIN(WEMOS) D1 R2 & mini

NOTE! In order to use this logging code, you have to be running the Legacy 1.x IDE, so you can use the ESP data upload tool. Probably not something that will be ultimately necessary for the actual project, just an annoying step for now for data logging Currently, just using the Examples -> ESP8266WebServer -> Graph Additionally, for the logging demo code, you'll need to install a tool [following the instructions here] (https://arduino-esp8266.readthedocs.io/en/latest/filesystem.html#uploading-files-to-file-system), get the LittleFS code

Here is the guide to the LIS3DH library, TL;DR, in the Arduino Library Manager, install the Adafruit LIS3DH and Adafruit Unified Sensor libraries

LED control is impletemented through the FastLED package. FastLED by default uses interrupts for timing with the WS2811 LEDs, which can interfere with wifi communication on the esp board (aka, our D1 mini). Information on FastLED interrupt use and problems with other board functionality, as well as potential solutions, are discussed here. Tl;dr: maybe don't do interrupts? Or use shorter LED strings? Or a board with more processing capability?

We're also using MQTT for passing data between the pi and D1 minis.

Jacket

Bill of Materials

• Raspberry Pi
• Webcam x4
• D1 mini esp382 wifi microcontroller
• USB battery with on/off switch
• Potentiometer
• Flora NeoPixels (aka sewable WS2812 RGB LEDs) x7

Raspberry Pi setup

• Using the Raspberry Pi Imager, select Raspberry Pi OS (other) -> Raspberry Pi OS (64-bit) and write that to the SD card
• Setup Rasbperry Pi as normal, I set user=raspi, pw=pi, set region to United States and/or click the US keyboard layout button, let it update
• Install opencv by opening a terminal and using pip3 install opencv-python (Note: make sure to use pip3, regular pip won't find a precomplied version, try to compile from source, then fail after many hours)
• Install the zenoh python package `
• Install the zenoh server:

echo "deb [trusted=yes] https://download.eclipse.org/zenoh/debian-repo/ /" | sudo tee -a /etc/apt/sources.list > /dev/null
sudo apt update
sudo apt install zenoh 

• Set up the Pi as a WiFi Access Point (AP) - more details are in the Raspberry Pi Code\WiFiSetup.md, if you need more details

D1 Mini Setup

Code environment is the same as what's discussed for the shoes.

Wiring connection list

D1 Mini	Pot	LED1	RaspberryPi
USB	-----	------	USB
5V	Vin	Vin	-----------
G	GND	GND	-----------
A0	Out	----	-----------
D7	---	Din	-----------