● Covered by 1 source · 1 reportLow impact1 neutral
Developer achieves 190 KB/s data transfer using streaming QR codes in browser
Key points
- Data transfer uses streaming QR codes at 60 FPS.
- Achieves up to 190 KB/s data rate in tests.
- Browser-based, requires only camera permission.
- Utilizes fountain codes for reliable transfer.
New Data Transfer Method Developed
A developer, bashalarmistalt, has created a proof-of-concept data transfer system called Decimen Optical Transfer. This system enables data transmission between devices by streaming rapidly updating QR codes at up to 60 frames per second through a standard web browser.
Performance and Requirements
The method achieved data transfer rates of up to 190 KB/s in phone-to-phone tests. It operates without requiring dedicated applications, network connections, or device pairing. The only permission needed is camera access, as the system functions entirely within the smartphone's web browser.
For optimal performance, stationary devices can reach ~186 KB/s, while handheld transfers achieved ~128 KB/s using an iPhone with Apple ProMotion camera and stacked codes.
Technical Implementation
The developer used Claude Code to build the cached web app. The system incorporates 'fountain codes' to ensure data integrity and handle missed frames during transfer. Each streamed QR code frame includes a 20-byte header containing session ID, sequence number, block count/size, file length, and a hash, making each frame self-describing.
Motivation and Availability
The project was conceived to provide a phone-to-phone file transfer option that does not rely on devices being on the same network. The Decimen Optical Transfer software is distributed under the MIT license, making it openly available.
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Primary sources
GitHub bashalarmistalt/decimen-optical-transferReporting from
A developer created a proof-of-concept system, Decimen Optical Transfer, that streams data between devices using rapidly updating QR codes at up to 60 FPS, achieving nearly 190 KB/s. This method operates within a browser, requiring only camera access and no networking, pairing, or dedicated apps, offering a new approach to device-to-device data transfer.