[Media] I made a thing that sends files between devices with no wifi/bluetooth/cable

I made a thing called Semaphore, it moves a file from one device to another with literally nothing connecting them, one screen loops a video of QR codes, the other device films it with a webcam/camera, and the file rebuilds on the other side.

It's fountain-coded so it doesn't matter which frames the camera misses, browser demo, try it with a laptop/your phone: https://vietnguyengit.github.io/semaphore

There are SDKs too if you wanna build on it, and there's a CLI for the terminal/desktop version.

Github: https://github.com/vietnguyengit/semaphore