3 ms·

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

3 points by pavel_lishin 9mo ago

westurner 9mo ago
> 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://www.google.com/search?q=hertz+epilepsy ... https://share.google/aimode/14ylo2plM3ajp3Vwy https://share.google/aimode/14ylo2plM3ajp3Vwy "Nearby peer discovery without GPS using environmental fingerprints" (2025) https://news.ycombinator.com/item?id=46003606 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/overview https://developers.google.com/maps/documentation/geolocation... Quick Share > Technology: https://en.wikipedia.org/wiki/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-api-overview https://developers.google.com/awareness/android-api/snapshot... get_nearby_beacons: https://developers.google.com/awareness/android-api/snapshot-get-data#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 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 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-direct#fetch 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 https://news.ycombinator.com/context?id=46833627

3 points by pavel_lishin 9mo ago

> 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://www.google.com/search?q=hertz+epilepsy ... https://share.google/aimode/14ylo2plM3ajp3Vwy https://share.google/aimode/14ylo2plM3ajp3Vwy "Nearby peer discovery without GPS using environmental fingerprints" (2025) https://news.ycombinator.com/item?id=46003606 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/overview https://developers.google.com/maps/documentation/geolocation... Quick Share > Technology: https://en.wikipedia.org/wiki/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-api-overview https://developers.google.com/awareness/android-api/snapshot... get_nearby_beacons: https://developers.google.com/awareness/android-api/snapshot-get-data#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 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 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-direct#fetch 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 https://news.ycombinator.com/context?id=46833627