Breaking the QR Limit: The Discovery of a Serverless WebRTC Protocol – Magarcia

> Prior work exists: animated QR sequences that flash frames until the scanner captures all parts23, and fountain codes (TXQR4) that tolerate missed frames. These achieve ~9 KB/s under ideal conditions but require holding steady for 10+ seconds

Consideration for Photosensitive epilepsy; how to avoid this risk? What bitrates are realistic given these updated constraints?

/? hertz epilepsy: https://www.google.com/search?q=hertz+epilepsy ... https://share.google/aimode/14ylo2plM3ajp3Vwy

"Nearby peer discovery without GPS using environmental fingerprints" (2025) https://news.ycombinator.com/item?id=46003606

The Google Geolocation API uses the wifi BSSID lists to determine location. "How the Geolocation API works": https://developers.google.com/maps/documentation/geolocation...

Quick Share > Technology: https://en.wikipedia.org/wiki/Quick_Share#Technology

> Internally, Quick Share relies on standard Wi-Fi technologies such as Wi-Fi Direct and Wi-Fi Aware (Neighbor Awareness Networking), BLE,

> 2025, Google extended Quick Share to support interoperable sharing with Apple's AirDrop on devices running iOS 26

Android > Google Awareness API > Snapshot API: https://developers.google.com/awareness/android-api/snapshot...

get_nearby_beacons: https://developers.google.com/awareness/android-api/snapshot...

But Gemini says that's deprecated since 2021; to instead use a third-party library like AltBeacon for finding BLE beacons:

AltBeacon/android-beacon-library: https://github.com/AltBeacon/android-beacon-library :

> By default, this library will only detect beacons meeting the AltBeacon specification.

> If you want this library to work with proprietary or custom beacons, see the BeaconParser class.

davidgyoung/beacon-parsers: https://github.com/davidgyoung/beacon-parsers :

> IBeaconParser, EddystoneUidParser, EddystoneUrlParser, UrlBeaconParser

What are BLE beacon chipsets and costs, and what bitrates can a BLE beacon push?

Wifi-direct > Fetch the list of peers: https://developer.android.com/develop/connectivity/wifi/wifi...

mDNS does only local network segment peer discovery for e.g. Printers, Chromecast, and Matter devices.

Notes also for this: https://news.ycombinator.com/context?id=46833627