Green Light: Fashion Using Arduino • Tech Projects

Ever wanted feedback on your new haute couture? Sprinkle a little IoT magic and get immediate critique on your fashion success or failure.

Things used in this project

Hardware components

Arduino MKR1000

Adafruit NeoPixel Ring: WS2812 5050 RGB LED

Software apps and online services

Microsoft Azure

Story

Are you a fashion trend-setter? Do you like to know how other’s feel about your clothing choices? Don’t want to look at your phone to know when your style owns the room, or worse, you’ve made a fashion faux pas on the level of socks with sandals?

Introduction “Green Light: Fashion“, the first wearable that provides an easy way for you to get immediate feedback on your ensemble and keep you ahead of the fashion curve.

How does it work/What does it do?

Your friends use the QR Code to vote on your outfit you are wearing that day.

The more positive the feedback the more GREEN you get on your wearable.

How’s it made?

Arduino MRK10/Genuino

0.96 Inch 4Pin White IIC I2C OLED Display Module 12864 LED For Arduino

Tutorial on the OLED Display:

https://github.com/olikraus/u8glib/wiki

neo (1)

1x RGB LED Ring-16 x WS2812 5050 With Integrated Drivers Round Light DC4V-7V

Azure Hub Setup

If you are not already using Azure you can subscribe to a free account. Use the Azure portal to create you own IoT Hub with the Microsoft Link:

https://azure.microsoft.com/en-in/documentation/articles/iot-hub-csharp-csharp-getstarted/

Schematics

MRK100+NeoPixel+OLED

Main Wiring Diagram

Code

//For Wifi
#include <SPI.h> 
#include <WiFi101.h>

//For NeoPixel
#include <Adafruit_NeoPixel.h>
#define PIN 3

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(16, PIN, NEO_GRB + NEO_KHZ800);

// OLED

#include "U8glib.h"

U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NO_ACK);	// Display which does not send ACK

int frame = 0;

const uint8_t frame1[] PROGMEM = {
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};


void draw()
{
   u8g.drawBitmapP( 0, 0, 16, 64, frame1);
}


///*** WiFi Network Config ***///
char ssid[] = "YourWiFiNetworkSSID"; //  your network SSID (name)
char pass[] = "YourWiFiNetworkPasswd";    // your network password (use for WPA, or use as key for WEP)

///*** Azure IoT Hub Config ***///
//see: http://mohanp.com/  for details on getting this right if you are not sure.

char hostname[] = "YourIoTHubName.azure-devices.net";    // host name address for your Azure IoT Hub
char feeduri[] = "/devices/YourDeviceName/messages/devicebound?api-version=2016-02-03"; //feed URI
char authSAS[] = "YourSharedAccessKey";

///*** Azure IoT Hub Config ***///

unsigned long lastConnectionTime = 0;            
const unsigned long pollingInterval = 5L * 1000L; // 5 sec polling delay, in milliseconds

int status = WL_IDLE_STATUS;

WiFiSSLClient client;

void setup() {
  
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'


  //check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    // don't continue:
    while (true);
  }

  // attempt to connect to Wifi network:
  while (status != WL_CONNECTED) {
    status = WiFi.begin(ssid, pass);
    // wait 10 seconds for connection:
    delay(10000);
  }
}

void loop() 
{
  
  draw();
  
  String response = "";
  char c;
  ///read response if WiFi Client is available
  while (client.available()) {
    c = client.read();
    response.concat(c);
  }

  if (!response.equals(""))
  {
    //if there are no messages in the IoT Hub Device queue, Azure will return 204 status code. 
    if (response.startsWith("HTTP/1.1 204"))
    {
      //turn off onboard LED
      setNeo(response.body);
    }
  }

  // polling..if pollingInterval has passed
  if (millis() - lastConnectionTime > pollingInterval) {
    azureHttpRequest();
  }
}

// this method makes an HTTPS connection to the Azure IOT Hub Server:
void azureHttpRequest() {

  // close any connection before send a new request.
  // This will free the socket on the WiFi shield
  client.stop();

  // if there's a successful connection:
  if (client.connect(hostname, 443)) {
    //make the GET request to the Azure IOT device feed uri
    client.print("GET ");  //Do a GET
    client.print(feeduri);  // On the feedURI
    client.println(" HTTP/1.1"); 
    client.print("Host: "); 
    client.println(hostname);  //with hostname header
    client.print("Authorization: ");
    client.println(authSAS);  //Authorization SAS token obtained from Azure IoT device explorer
    client.println("Connection: close");
    client.println();

    // note the time that the connection was made:
    lastConnectionTime = millis();
  }
  else {
    // if you couldn't make a connection:
    Serial.println("connection failed");
  }
}