HackerReposA FIELD GUIDE TO OPEN SOURCE
ProSponsor the shelf♧ 0
← Back to top all-time
divan
txqr
Go2019–2026
divan / txqr

txqr

Transfer data via animated QR codes

Explore on GitHubRead Hacker News discussions
7Distinct people
8Mentions
0Explicit recommenders
3.3KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Transfer data via animated QR codes

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year8 dated mentions

Observed mentions: 2019-01-02 07:32:20 UTC to 2026-04-28 15:56:21 UTC.

0123452019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments20192020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 5 mentions; 0 submissions, 5 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments20222023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-01-01 00:00:00 UTC to 2027-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments. Incomplete calendar period.2026*

* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC211
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC505
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC000
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC000
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC000
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC000
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC000
2026 (partial)2026-01-01 00:00:00 UTC2027-01-01 00:00:00 UTC101

What Hacker News says

8 sources
sz3·Dec 17, 2020
Hello all, You've seen QR codes, maybe Microsoft HCCB [0], maybe jabcode [1] – well, here's a prototype of something new for the pile. :) I saw txqr [2] a while back and was impressed, but also curious about how much throughput was possible with animated bar codes. I may have gotten carried away in my research into the question. cimbar is a single and multi-frame color barcode format using reed solomon (for now) and wirehair [3] for error correction. Files are encoded into an animated series of bar codes drawn to the display. Files are decoded by an Android app [4] with its camera pointed at the cimbar code. This works with all antennas off, e.g. in airplane mode, because it's only using the visual data channel. I ported the encoder to wasm, because I could: https://cimbar.org Sustained transfer speed is currently on the order of 800 kilo
Read the rest
bits/second. So it's not very practical for files larger than a couple of MB, unless you have a lot of free time. :) [0] https://en.wikipedia.org/wiki/High_Capacity_Color_Barcode [1] https://github.com/jabcode/jabcode [2] https://github.com/divan/txqr [3] https://github.com/catid/wirehair [4] https://github.com/sz3/cfc/releases/latest
In Show HN: Cimbar – File transfer via color barcodes and the Android camera
pqb·Dec 9, 2020
> And the little bit of information they provide, like a link. I don’t know. I share the lack of sentiment to hype and overusing its name and symbol but I cannot agree about the sentence I have quoted about. The QR code comes with titles and URIs, which provides nice way how to share some information with a distinction of their type, i.e. a contact card, OTP passphrase, WiFi credentials (SSID/passphrase pair). Instead of providing a password, which is hard to spell out, we can just share an image and in a moment after scanning we are connected to the WiFi. Been there, works like a charm. We can also use them to share data of multi-MB weight over just an animation combined with generated QRs [0]. [0]: https://github.com/divan/txqr
In A QR code built from Emoji
divan·Mar 21, 2020
Three projects that I'm prototyping/developing in a spare time: - 3d visualization of the mental model of the code, based on static analysys, with a goal of drastically improving code navigation and comprehension, especially of large codebases. Currently for Go only, because Go OOP design unsurprisingly lacks ambiguities between language constructs and mental model blocks. I had WebGL-based prototype (written using GopherJS), but I see the future of this project only in VR/AR, so I'm exploring this space, trying to figure out what/how to do the next iteration in this emerging zoo of VR/AR frameworks. The logic behind this project and initial demo are in the blog post "Rethinking visual programming in Go", but it's a long read. https://divan.dev/posts/visual_programming_go/ - prototyping (docs and initial simulation) new messaging solution
Read the rest
that is peer-to-peer first and is transport agnostic (i.e. will work over SDR in case of internet apocalypsis), and is aimed for the future stacks(IPv6/StarLink everywhere, NAT is in the computer archeology textbooks only). Plus configurable tradeoffs – instant delivery and offline storage (via federated server you own) vs non-instant but aggressive resilience to network disruption (should work over mesh networks), dark routing (for zero-trust hostile networks) vs fully exposing transport layer details (if you talk to your kid over your home wifi router, why would you care about hiding IP address or send your message to the datacenter across the globe). I spent some time in the messaging, and clearly see how many of the tradeoffs just push people to use centralized servers, and that makes sense and works fine, until it doesn't (think Telegram and Rostelecom IP addresses block). It'll probably have worse performance than current messengers, but it'll work when everything else is not. No links to share yet, sorry. - txqr – I did an animated QR data transfer app in Go and Gomobile (https://github.com/divan/txqr), which uses fountain codes, but that was just for fun. Now, after working for a year or so with Flutter, I want to make a mobile/desktop/web app out of it (Flutter works with Gomobile) that people actually can use and/or embed into their apps, and that's on my backlog for side projects.
In Ask HN: What projects are you working on now?

MAKE YOURSELF AT HOME

A few shortcuts

/
Search the collection
?
Open this guide
Esc
Close dialogs and navigation

Your saved repositories and interests stay in this browser.