Software Engineering Stack Exchange
Software Engineering Stack Exchange

Questions tagged [qr-code]

12 questions
34
votes
9 answers

Is it good practice to echo PHP code into inline JS?

I'm new to PHP and JS and I'm currently working on a gym management web app for our project in school. I'm adding a bit of QR functionality that sees if the user is eligible to enter the gym or not by checking if the user has paid. I want to know if…
therealtsuki
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7
votes
4 answers

QR Codes as Booking Confirmations for Conference?

A client of mine is holding a conference and we have the task of creating a booking system for them. However they have requested that we use QR codes so that on the door, a person can simply present their QR code, be scanned, and boom! they are…
Chud37
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7
votes
1 answer

Patient Record Tracking System

Background At a medical facility, staff can remove patient records (file folders) from a room. The room is locked using a standard tumbler lock (i.e., no swipe cards). The medical facility does not have much funding available. All staff members have…
Dave Jarvis
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6
votes
2 answers

How many bytes can I fit into a QR code, with low error correction?

I need to fit at least 300 bytes (or much much more) into a QR code and think I can do this by mapping each byte into the associated ISO/IEC 8859-1 character located here. Since each byte (1-255) will only have one character associated with it, I…
makerofthings7
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1
vote
1 answer

When do I reset Two Factor Authentication secret keys?

I have built a simple authentication system for my web application that makes use of the open-source time-based OTP algorithm (RFC 6238). The key for each user is generated when the user is registered in the system. When the user first signs into…
Mike Rockétt
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0
votes
2 answers

Encoding text to image and decoding back to text

(FYI: I asked this question on stack overflow and was directed here) My problem is as follows: I have a dashboard running on a server at customer premises which updates every 15 minutes The dashboard has multiple views The dashboard has hundreds of…
Imtiaz
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0
votes
4 answers

QR order - how to prevent customers from placing an order when they're not on premise

From my understanding, a QR code is just a static link which get opened up when I scan the code with my phone's camera. Once opened, a customer can keep the browser tab even after he leaves the restaurant. If that's the case, my question is: How can…
JamesBoyZ
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0
votes
1 answer

Short and compact barcode

I am writing a c# program where I need to print a lot of small barcodes in a 100x100 grid on a piece of paper. I then scan/photograph the paper and read the barcodes again. Each barcode only need to contain a simple ID code so that I know which…
DrDress
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0
votes
1 answer

Cheap and effective way to secure a transport permit of the wildlife to be prevent being reused

My scenario is like this. I work for a government agency that specialize in the Environment and Natural Resources. We want to make fool-proof functional system (software, hardware, people-ware, policy) that would: prevent the reuse of a permit…
Sam Mamuric
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0
votes
1 answer

Barcode that support ~3500 chars

I can't figure out a barcode that would support ~3500 chars. The barcode should contain 40 strings with caret return, each 76 chars long. Each string will look like…
SovereignSun
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0
votes
1 answer

How can I improve my method of authenticating library students

I'm in the process of designing a library system. There's one application for the librarian to manage books, manage users, etc. But, we also need to ensure that subscriptions are paid on time in this system and to ensure only people who have an…
codez
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votes
1 answer

Can I store product manufacturing data and a ULR into the same QR code?

I'm manufacturing a product that I will be selling to retailers throughout the United States. I want to be able to track the products manufacturing date, who we sold that batch of production too, and some other data in the QR code so if I ever get a…
bender1227
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