Paul Langdon
Published © CC BY-NC-SA

Green Light: Fashion

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

BeginnerWork in progress4 hours3,070
Green Light: Fashion

Things used in this project

Story

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Schematics

MRK100+NeoPixel+OLED

Main Wiring Diagram

Code

Main

Arduino
Main Arduino 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");
  }
}





void setNeo(state) {

  strip.setPixelColor(0, 255, 0, 255);
  strip.setPixelColor(1, 255, 0, 255);
  strip.setPixelColor(2, 255, 0, 255);
  strip.setPixelColor(3, 255, 0, 255);
  strip.setPixelColor(4, 255, 0, 255);
  strip.setPixelColor(5, 255, 0, 255);
  strip.setPixelColor(6, 255, 0, 255);
  strip.setPixelColor(7, 255, 0, 255);
  strip.setPixelColor(8, 255, 0, 255);
  strip.setPixelColor(9, 255, 0, 255);
  strip.setPixelColor(10, 255, 0, 255);
  strip.setPixelColor(11, 255, 0, 255);
  strip.setPixelColor(12, 255, 0, 255);
  strip.setPixelColor(13, 255, 0, 255);
  strip.setPixelColor(14, 255, 0, 255);
  strip.setPixelColor(15, 255, 0, 255);
  
  strip.show();

}

u8glib Library

Credits

Paul Langdon

Paul Langdon

49 projects • 319 followers
Working as a cloud architect for an IoT hardware company

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