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[Off-Topic] [Device Team][Tech Class]Chapter-25: All about QR Codes.

2017-08-13 03:34:48
7334 123

Hi Mi fans,

QR codes are all the rage right now.Everybody wants one,they appear on business cards,soda cans,brochures, bill boards and even our TV.We are seeing a lot of good uses of QR codes but unfortunately, also a lot of bad ones.Keep on reading for a beginners class on QR codes.

What is a QR Code?
QR code(quick response code) is the trademark for a type of matrix bar code or two-dimensional bar code.First designed for the automotive industry in Japan. A bar code is a machine-readable optical label that contains information about the item to which it is attached. A QR code uses four standardized encoding modes(numeric,alpha-numeric,byte/binary and kanji) to efficiently store data.
The QR code system became popular outside the automotive industry due to it's fast readability and greater storage capacity compared to standard UPC bar codes.Applications include product tracking, item identification, time tracking, document management,and general marketing.
A QR code consists of black squares arranged in a square grid on a white background,which can be read by an imagining device such as a camera and processed using Reed-Solomon error correction until the image can be appropriately interpreted.

Some versions of QR Code symbols:


Modern History of QR Codes
The QR code system was invented in 1994 by Denso Wave.It's purpose was to track vehicles during Q1manufacturing; it was designed to allow high-speed components scanning. QR codes are now used in a much broader context,including both commercial tracking applications and convenience-oriented applications aimed at mobile phone users.QR codes may be used to display text to the users,to add a vCard contact to the user’s device,to open a Uniform Resource Identifier, or to compose an email or text message. There are a great many QR code generators available as software or as online tools.The QR code has become one of the most- used types of two-dimensional code.

Some of the frequently asked questions and answers about QR codes.

Q1:How does it work?
A:Users take a picture of the code using an adequate application on their smartphones, which then pulls up information such as a website, pictures, videos, or even contact information.

When users already have the app installed, the process is really easy and doesn’t require many steps. The user opens the app, takes a picture of the code and is directed to the information stored in the QR code.

Q2:How do i get a QR Code?
A:There are many QR code generators available for free online. kaywa easily lets you create codes in one step for websites, phone numbers, text or SMS. It is important to note that this site only allows the creation of QR codes for non-commercial use.

If you are looking for a more custom QR code that would be able to display your contact information (scan Matmon’s goldfish code below for a preview) a location or more, ask Matmon to program your unique QR code. We create codes for professionals and we can manage and track hundreds or even thousands of them if you like.

Indeed, QR codes can be customized to fit your brand and be less generic. Scanners allow up to a 30% error margin, that is to say you can modify 30% of your QR code and it will still be readable. Change the colors, add text, a logo or anything else you want to do, as long as it stays within the 30% margin. Here is a QR code with Matmon’s contact information, before and after.

Q3:Why do i want a QR Code?
A:There are many ways to use QR codes. It is a simple way to transition your users from your traditional offline world to your online world.

Give your contact information. If your profession relies heavily on contact, put a QR code on your business card and have it display your phone number, name, title, company etc. Your contact will only have to scan the code to enter your information in their phone.

Increase website traffic. Display the code on your promotional material, catalog, or the product itself.

Engage with the customer. QR codes are an easy way to engage with your customers and to create brand loyalty. Once the novelty wears off, users want to gain something out of scanning your code. Have the QR code link to a coupon on your site, a promotion, and exclusive product pictures. You can also have it link to your Facebook page where you should be providing the same kind of value.

To finish, here a some creative QR codes from Help Japan Now, True Blood, M&M’s and

Thank you

Special thanks to our Super Mod : Gagandeep Singh

In case you missed any tech class thread.
Class 17:All About RAM
Class 24:All About Bar Codes


Number of participants 9 Experience +67 Pack Reason

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2017-08-13 03:34:48
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Master Bunny

Ravikant Sinha | from Redmi 4


thnkx for sharing..
2017-08-20 01:06:09

Master Bunny

the_3pyro | from app


nice info
2017-08-20 01:10:14

Very Nice Thread
2017-08-20 01:10:17

Pro Bunny

Zizou | from Mi 4i


Great info
2017-08-20 01:11:28

Master Bunny

PBL | from Redmi Note 4


Good information
2017-08-20 01:11:57

Master Bunny

Suman Kumar Das | from Redmi Note 3


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2017-08-20 01:12:59

MIUI Beta Tester

Bhargav D Dave | from Redmi Note 4


thanks for sharing
2017-08-20 01:13:07

Read Only

1727189897 | from Redmi Note 4


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.....जय हिन्द.....जय चैंपकैश...
2017-08-20 01:15:21

Read Only

1727189897 | from Redmi Note 4


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2017-08-20 01:16:09

Semi Pro Bunny

AK Ajay | from Redmi 4


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2017-08-20 01:16:50
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