Project tutorial

DIY Smart Necklace Snowing by Shake with Arduino © GPL3+

Our idea is to make a necklace using an Arduino Pro Mini and OLED display to show an animation on it.

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Components and supplies

Apps and online services

About this project

You can read this and other amazing tutorials onElectropeak's official website

Circuit

Code

ou must add the OLED display library and then upload the code. Go to Manage Libaray and search for Adafruit SSD1306 and download it. If it is the first time you are using an Arduino board, don’t worry, just follow these steps:

  • Go to www.arduino.cc/en/Main/Software and download the Arduino software compatible your OS. Install the IDE software as instructed.
  • Run the Arduino IDE and clear the text editor and copy the following code in the text editor.
  • Choose the board in tools and boards, select your Arduino Board.
  • Connect the Arduino to your PC and set the COM port in tools and port.
  • Press the Upload (Arrow sign) button.
  • You are all set!

#include "SPI.h"
#include "Wire.h"
#include "Adafruit_GFX.h"
#include "Adafruit_SSD1306.h"
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
// Declaration for SSD1306 display connected using software SPI (default case):
#define OLED_MOSI   2
#define OLED_CLK   3
#define OLED_DC    4
#define OLED_CS    5
#define OLED_RESET 6
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
 OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
/* Comment out above, uncomment this block to use hardware SPI
#define OLED_DC     6
#define OLED_CS     7
#define OLED_RESET  8
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
 &SPI, OLED_DC, OLED_RESET, OLED_CS);
*/
#define NUMFLAKES     15 // Number of snowflakes in the animation example
#define LOGO_HEIGHT   4
#define LOGO_WIDTH    4
static const unsigned char PROGMEM logo_tree[] =
{
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xc0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xc0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xe0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0xe0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf3, 0x30, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xc3, 0x30, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x07, 0x83, 0x38, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c, 0x0f, 0x03, 0x18, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x1c, 0x03, 0x1c, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xfe, 0x78, 0x03, 0x0c, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xb7, 0xf0, 0x03, 0x0e, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x33, 0xe0, 0x03, 0x0e, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x33, 0x80, 0x03, 0x06, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x3c, 0x33, 0x80, 0x07, 0x07, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xf0, 0xf0, 0x31, 0x80, 0x07, 0x07, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xf1, 0xe0, 0x31, 0xc1, 0xc7, 0x03, 0x00, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xf3, 0xc0, 0x31, 0xc1, 0xc6, 0x03, 0x00, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1d, 0xff, 0x00, 0x30, 0xc0, 0x86, 0x03, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79, 0xde, 0x0c, 0x70, 0xc0, 0x06, 0x03, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf1, 0x9c, 0x1c, 0x70, 0xe0, 0x06, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xe1, 0x9c, 0x0c, 0x60, 0xe0, 0x0e, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x81, 0x9c, 0x00, 0x60, 0x60, 0x0e, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x01, 0x8c, 0x00, 0x60, 0x60, 0x0c, 0x21, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x03, 0x8c, 0x00, 0xe0, 0x60, 0x0c, 0x71, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x08, 0x00, 0x3c, 0x03, 0x0c, 0x00, 0xc0, 0x60, 0x1c, 0x71, 0xff, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x0c, 0x00, 0xf0, 0xc3, 0x0c, 0x00, 0xc0, 0x70, 0x1c, 0x01, 0xff, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x0e, 0x31, 0xe1, 0xc7, 0x0c, 0x01, 0xc0, 0x70, 0x18, 0x01, 0xff, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x0f, 0xe3, 0xc0, 0xc6, 0x0e, 0x01, 0x80, 0x70, 0x18, 0x00, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x1f, 0xe7, 0x00, 0x0e, 0x0e, 0x03, 0x80, 0x70, 0x38, 0x00, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0xff, 0xce, 0x00, 0x0c, 0x0e, 0x03, 0x80, 0x70, 0x30, 0x00, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0xff, 0xce, 0x00, 0x1c, 0x0e, 0x03, 0x0c, 0x70, 0x30, 0x00, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x1f, 0xe7, 0x00, 0x38, 0x0e, 0x07, 0x0e, 0x70, 0x70, 0x00, 0xff, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x0f, 0xe3, 0xc0, 0x70, 0x0e, 0x06, 0x0c, 0x70, 0x60, 0x00, 0xff, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x0e, 0x71, 0xe0, 0xf0, 0x0e, 0x0e, 0x00, 0x70, 0xe0, 0x01, 0xff, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x0c, 0x00, 0xf1, 0xe0, 0x0c, 0x1c, 0x00, 0x70, 0xe0, 0x01, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x08, 0x00, 0x7b, 0xc3, 0x8c, 0x18, 0x00, 0x61, 0xc0, 0x01, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x03, 0x8c, 0x38, 0x00, 0x61, 0xc2, 0x01, 0xc0, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x03, 0x8c, 0x70, 0x00, 0x61, 0x87, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x80, 0x1c, 0xe0, 0x00, 0x63, 0x87, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xc0, 0x19, 0xc0, 0x00, 0xe7, 0x02, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x1f, 0xc0, 0x00, 0xe7, 0x00, 0x01, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x1f, 0x81, 0xc0, 0xce, 0x00, 0x03, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x3f, 0x01, 0xc0, 0xcc, 0x00, 0x03, 0x80, 0xc0, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x33, 0xc0, 0x81, 0xdc, 0x00, 0x03, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xb1, 0xe0, 0x01, 0xb8, 0x00, 0x03, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xf0, 0xf0, 0x01, 0xf0, 0x00, 0x07, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x78, 0x03, 0xf0, 0x00, 0x07, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x03, 0xe0, 0x00, 0x06, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x03, 0xe0, 0xe0, 0x0e, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x87, 0xf0, 0xe0, 0x0e, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xe6, 0x78, 0x40, 0x0c, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x3c, 0x00, 0x1c, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c, 0x0f, 0x00, 0x18, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x07, 0x80, 0x38, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xc0, 0x38, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x70, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x70, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xe0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0xc0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xc0, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const unsigned char PROGMEM logo_bmp[] =
{     0x60, 
   0xf0, 
   0xf0, 
   0x60
};
bool merc;
void setup() {
 Serial.begin(9600);
 // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
 if(!display.begin(SSD1306_SWITCHCAPVCC)) {
   Serial.println(F("SSD1306 allocation failed"));
   for(;;); // Don't proceed, loop forever
 }
 // Show initial display buffer contents on the screen --
 // the library initializes this with an Adafruit splash screen.
 display.display();
 delay(2000); // Pause for 2 seconds
 merc=digitalRead(7);
 testdrawbitmap();    // Draw a small bitmap image
 testanimate(logo_bmp, LOGO_WIDTH, LOGO_HEIGHT); // Animate bitmaps
}
void loop() {
}
void testdrawbitmap(void) {
 display.clearDisplay();
if (merc==true){
 display.drawBitmap(0,0,logo_tree, 128, 64, 1);
 display.display();
 delay(1000);}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#define XPOS   0 // Indexes into the 'icons' array in function below
#define YPOS   1
#define DELTAY 2
void testanimate(const uint8_t *bitmap, uint8_t w, uint8_t h) {
 int8_t f, icons[NUMFLAKES][3];
 // Initialize 'snowflake' positions
 for(f=0; f< NUMFLAKES; f++) {
   icons[f][XPOS]   = random(1 - LOGO_WIDTH, display.width());
   icons[f][YPOS]   = -LOGO_HEIGHT;
   icons[f][DELTAY] = random(1, 6);
   Serial.print(F("x: "));
   Serial.print(icons[f][XPOS], DEC);
   Serial.print(F(" y: "));
   Serial.print(icons[f][YPOS], DEC);
   Serial.print(F(" dy: "));
   Serial.println(icons[f][DELTAY], DEC);
 }
 for(int i=0;i<10;i++) {
   display.clearDisplay(); // Clear the display buffer
 display.drawBitmap(0,0,logo_tree, 128, 64, 1);
 display.display();
   // Draw each snowflake:
   for(f=0; f< NUMFLAKES; f++) {
     display.drawBitmap( icons[f][YPOS],icons[f][XPOS], bitmap, 4, 4, WHITE);
   }
   display.display(); // Show the display buffer on the screen
  delay(50);        // Pause for 1/10 second
   // Then update coordinates of each flake...
   for(f=0; f< NUMFLAKES; f++) { icons[f][YPOS] += icons[f][DELTAY]; // If snowflake is off the bottom of the screen... if (icons[f][XPOS] >= display.height()) {
       // Reinitialize to a random position, just off the top
       icons[f][XPOS]   = random(1 - LOGO_WIDTH, display.width());
       icons[f][YPOS]   = -LOGO_HEIGHT;
       icons[f][DELTAY] = random(1, 6);
     }
   }
 }
} 

Assembling

The first step in making the smart necklace is to cut the Arduino board out as much as possible to fit it inside the necklace frame. It’s very important to avoid cutting the main tracks in the board and just cut the unused pins tracks.

Next, Connect the display to Arduino according to the circuit image. Now connect Mercury switch to pin 7 and add an ON/OFF switch between the battery and the Arduino.

Cover the circuit by a Plexi-glass (Acrylic sheet) frame, add a chain to the top of the frame and enjoy! You can build the frame with any other material you wish.

What’s Next?

Here are a few suggestions:

  • Try to make other animation and display them.
  • Try to make the circuit sensitive to other parameters like temperature.

Code

CodeArduino
#include "SPI.h"
#include "Wire.h"
#include "Adafruit_GFX.h"
#include "Adafruit_SSD1306.h"

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for SSD1306 display connected using software SPI (default case):
#define OLED_MOSI   2
#define OLED_CLK   3
#define OLED_DC    4
#define OLED_CS    5
#define OLED_RESET 6
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
  OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);

/* Comment out above, uncomment this block to use hardware SPI
#define OLED_DC     6
#define OLED_CS     7
#define OLED_RESET  8
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
  &SPI, OLED_DC, OLED_RESET, OLED_CS);
*/

#define NUMFLAKES     15 // Number of snowflakes in the animation example

#define LOGO_HEIGHT   4
#define LOGO_WIDTH    4

static const unsigned char PROGMEM logo_tree[] =
{
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xc0, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xc0, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xe0, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0xe0, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf3, 0x30, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xc3, 0x30, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x07, 0x83, 0x38, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c, 0x0f, 0x03, 0x18, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x1c, 0x03, 0x1c, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xfe, 0x78, 0x03, 0x0c, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xb7, 0xf0, 0x03, 0x0e, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x33, 0xe0, 0x03, 0x0e, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x33, 0x80, 0x03, 0x06, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x3c, 0x33, 0x80, 0x07, 0x07, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xf0, 0xf0, 0x31, 0x80, 0x07, 0x07, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xf1, 0xe0, 0x31, 0xc1, 0xc7, 0x03, 0x00, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xf3, 0xc0, 0x31, 0xc1, 0xc6, 0x03, 0x00, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1d, 0xff, 0x00, 0x30, 0xc0, 0x86, 0x03, 0x80, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79, 0xde, 0x0c, 0x70, 0xc0, 0x06, 0x03, 0x80, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf1, 0x9c, 0x1c, 0x70, 0xe0, 0x06, 0x01, 0x80, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xe1, 0x9c, 0x0c, 0x60, 0xe0, 0x0e, 0x01, 0x80, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x81, 0x9c, 0x00, 0x60, 0x60, 0x0e, 0x01, 0x80, 0xc0, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x01, 0x8c, 0x00, 0x60, 0x60, 0x0c, 0x21, 0x80, 0xc0, 0x00, 
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};

static const unsigned char PROGMEM logo_bmp[] =
{     0x60, 
    0xf0, 
    0xf0, 
    0x60
};

bool merc;

void setup() {
  Serial.begin(9600);

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }


  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display.display();
  delay(2000); // Pause for 2 seconds

  merc=digitalRead(7);
  testdrawbitmap();    // Draw a small bitmap image
  testanimate(logo_bmp, LOGO_WIDTH, LOGO_HEIGHT); // Animate bitmaps
}

void loop() {
}


void testdrawbitmap(void) {
  display.clearDisplay();
 if (merc==true){
  display.drawBitmap(0,0,logo_tree, 128, 64, 1);
  display.display();
  delay(1000);}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#define XPOS   0 // Indexes into the 'icons' array in function below
#define YPOS   1
#define DELTAY 2

void testanimate(const uint8_t *bitmap, uint8_t w, uint8_t h) {
  int8_t f, icons[NUMFLAKES][3];

  // Initialize 'snowflake' positions
  for(f=0; f< NUMFLAKES; f++) {
    icons[f][XPOS]   = random(1 - LOGO_WIDTH, display.width());
    icons[f][YPOS]   = -LOGO_HEIGHT;
    icons[f][DELTAY] = random(1, 6);
    Serial.print(F("x: "));
    Serial.print(icons[f][XPOS], DEC);
    Serial.print(F(" y: "));
    Serial.print(icons[f][YPOS], DEC);
    Serial.print(F(" dy: "));
    Serial.println(icons[f][DELTAY], DEC);
  }

  for(int i=0;i<10;i++) {
    display.clearDisplay(); // Clear the display buffer
  display.drawBitmap(0,0,logo_tree, 128, 64, 1);
  display.display();
    // Draw each snowflake:
    for(f=0; f< NUMFLAKES; f++) {
      display.drawBitmap( icons[f][YPOS],icons[f][XPOS], bitmap, 4, 4, WHITE);
    }

    display.display(); // Show the display buffer on the screen
   delay(50);        // Pause for 1/10 second

    // Then update coordinates of each flake...
    for(f=0; f< NUMFLAKES; f++) { icons[f][YPOS] += icons[f][DELTAY]; // If snowflake is off the bottom of the screen... if (icons[f][XPOS] >= display.height()) {
        // Reinitialize to a random position, just off the top
        icons[f][XPOS]   = random(1 - LOGO_WIDTH, display.width());
        icons[f][YPOS]   = -LOGO_HEIGHT;
        icons[f][DELTAY] = random(1, 6);
      }
    }
  }
}

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