Chat With Your Friends Without Internet Connection
Communicating via ultrasound is definitely a reality.
Thanks to a chat software called Quietnet, we can transfer text messages between two machines using the ultrasonic mechanism. It does not use any network or Bluetooth connection to transmit messages.
This little software is written in Python and uses Numpy and pyaudio. It consists of 2 scripts: a writer who sounds sounds close to the ultrasound frequencies (send.py) and a player (listen.py) that captures these sounds and decodes them into sentences. And everything goes through the microphone and the speakers.
Several options (rate, frequency, …) are adjustable in options.py file. It will be necessary to modify these settings if you want to have several communications at the same time without interfering with each other.
I do not know the scope. On the other hand, I wonder in practice how far you can communicate, with the rotten microphone of a portable computer.
Free messaging. No signal or mobile data needed. It’s the “INTERNET OF US” (TM)
FireChat works even without an Internet connection or cellular phone coverage. Use it anywhere: planes, public transportation, cruise ships, campuses, and crowded events. All you need is a few people around you using FireChat.
Bluetooth and WiFi need to be “on” to send and receive messages when not connected to a network (yes please turn WiFi on, even if you don’t have access to the Internet). And if you are connected to a cellular network or WiFi access point, then FireChat will work too.
You will be automatically connected directly with one another, creating your own network for public and private communications. The more people use it, the bigger and faster your network becomes.
And when you do have access to a reliable Internet connection or cellular network, FireChat helps you reach people worldwide and build your audience faster than on any social network, for free.
Leaders, artists, communities and organizations (news, cultural, humanitarian, sports…) love how quickly FireChat scales. FireChat helps them communicate instantly with large groups of people to achieve their goals.
Get FireChat now with a few friends and start something.