Created August 30, 2020

Authorization Device (SCRO)

A contact less device that allows you to control the things around you with gestures. And helps you to maintain social distance . ( WATCH)

Intermediate37

Things used in this project

Hardware components

Arduino Nano R3

Graphic OLED, 128 x 64

nRF24 Module (Generic)

Espressif ESP8266 ESP-01

Breadboard (generic)

RGB LCD Shield Kit, 16x2 Character Display

SparkFun Triple Axis Accelerometer and Gyro Breakout - MPU-6050

Hand tools and fabrication machines

Soldering iron (generic)

Story

Introduction :

Problem : In today's world, We can do almost everything online except real life experience. It is a lot better to do something in real life instead of virtual stuff. Lets just consider this competition as an example, It would have been a lot easier for our team when we are together. Now we are having issues with hardware, projects like these are meant to be done together, but the problem is to maintain social distancing and do things without touching .

Solution: We came up with an idea for a device using which we can maintain social distancing and also do most of our daily routine work touchless . A watch that tells you time , alarm and most of the basic things a watch does and a lot more like telling you to maintain social distance when you are too close with someone. Or control things with gestures like turning on a fan, a light or anything you want . And can also be used in offices for authorization instead of an id card or a fingerprint scan and in a secure and a safer way.

Features:

Authorization : An authorization unit can be set in the office instead of a fingerprint scanner and this watch will be authenticated by using a certain token to identify and let someone in. We are using NRF24 for that which uses RF both in the watch and the authorization unit. And once the token matches with the system, It will be authorized and allow you in.

Social Distance: Watch will be having an OLED screen to notify you when you are in proximity of another watch. This feature only works with people with our watch. This is not for the public but in a 3D movie we get 3D glasses and after the movie, we will return it. In the same way during any important meetings in offices or in any other places these watches can be distributed and can later be collected. Most of the tracking devices use RF for these kinds of purposes but we wanted to try the same concept with an electric field instead of using radio frequency. Mini tesla coil with low power cabe mounted in the watch and a detector can be used to detect the field and a pair of both working alternatively could help so that two watches can detect the other watch when in proximity and alert the user by displaying a message on the OLED.

Gesture Control: During these days in public places or even in our houses it's not safe to touch anything. It would be a lot better if they were touchless and it can be done using a simple gyro and accelerometer in the watch and by doing simple gestures in the air and adding a receiver in the things we want to control can be done.

Code

smart watch

#include <U8glib.h>
#include "U8glib.h"
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);

void draw(void) {
  // graphic commands to redraw the complete screen should be placed here  
  u8g.setFont(u8g_font_unifont);
  //u8g.setFont(u8g_font_osb21);
  u8g.drawStr( 0, 22, "8:22");
}

void setup(void) {
  // flip screen, if required
  // u8g.setRot180();
  
  // set SPI backup if required
  //u8g.setHardwareBackup(u8g_backup_avr_spi);

  // assign default color value
  if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
    u8g.setColorIndex(255);     // white
  }
  else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
    u8g.setColorIndex(3);         // max intensity
  }
  else if ( u8g.getMode() == U8G_MODE_BW ) {
    u8g.setColorIndex(1);         // pixel on
  }
  else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
    u8g.setHiColorByRGB(255,255,255);
  }
  pinMode(8, OUTPUT);
}

void loop(void) {
  // picture loop
  u8g.firstPage();  
  do {
    draw();
  } while( u8g.nextPage() );
  
  // rebuild the picture after some delay
  //delay(50);
}

Authorization Device (SCRO)

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics