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ggerganov / ggwave

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README.md

 Waver

Waver allows you to send and receive text messages from nearby
devices through sound waves.

This application can be used to communicate with multiple nearby
devices at once. Both audible and ultrasound communication protocols
are available. The app does not connect to the internet and all
information is transmitted only through sound. In order to receive
incoming messages you only need to allow access to your device's
microphone so that it can record nearby sounds.

The main purpose of this app is to showcase the capabilities of the
ggwave library. It is a convenient way to quickly test the
transmission performance on virtually any device with speakers and a
microphone.

 Install

Download on the App Store Get it on Google Play Get it from the Snap
Store

 Linux

sudo snap install waver
sudo snap connect waver:audio-record :audio-record

 Mac OS

brew install ggerganov/ggerganov/waver

 Run directly in the browser

https://waver.ggerganov.com

 How to use

Click on the gif to watch a ~2 min Youtube video:

[waver-preview1]

  * Before starting - make sure the speaker of your device is enabled
    and disconnect/unplug any headphones. The app uses your device's
    speaker to emit sounds when sending a text message
  * To send a message - tap on "Messages", enter some text at the
    bottom of the screen and click "Send"
  * Any nearby device that is also running this application can
    capture the emitted sound and display the received message
  * In the settings menu, you can adjust the volume and the
    transmission protocol that will be used when sending messages.
    Make sure to adjust the volume level high enough, so the sounds
    can be picked up by other devices
  * Tap on "Spectrum" to see a real-time frequency spectrum of the
    currently captured audio by your device's microphone

 File sharing in a local network

As of v1.3.0 Waver supports file sharing. It works like this:

  * Add files that you would like to transmit by sharing them with
    Waver
  * In the "Files" menu, click on "Broadcast". This plays an audio
    message that contains a file broadcast offer
  * Nearby devices in the same local network can receive this offer
    and initiate a TCP/IP connection to your device
  * The files are transmitted over TCP/IP. The sound message is used
    only to initiate the network connections between the devices
  * Waver allows sharing multiple files to multiple devices at once

 Known issues

  * The browser version does not support on-screen keyboard on mobile
    devices, so it is not possible to input messages. Use the mobile
    app instead
  * In some cases utlrasound transmission is not supported (see #5)

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