How do you communicate when the government censors the internet? With a peer-to-peer mesh broadcasting network that doesn’t use the internet.
That’s exactly what Hong Kong pro-democracy protesters are doing now, thanks to San Fransisco startup Bridgefy’s Bluetooth-based messaging app. The protesters can communicate with each other — and the public — using no persistent managed network.
The app can connect people via standard Bluetooth across an entire city, thanks to a mesh network. Chatting is speediest with people who are close, of course, within a hundred meters (330 feet), but you can also chat with people who are farther away. Your messages will simply “hop” via other Bridgefy users’ phones until they find your intended target.
That’s incredibly futuristic
Pi Zero W is $10 and has built in Bluetooth connectivity.
You can find Solar USB Power Packs for ~$25.
So for less than $50 and a little time investment to load some programs you can have an autonomous bluetooth repeater.
I think they only run at Class 2 or 2.5mw so 10 meter range… but there are DIY solutions to amplify it to Class 1 for 100 meter range.
But even at 10 meters, given this sort of program uses a packet delivery system, if you are constantly on the move you’re effectively a postman for the system as it will transmit every time it comes in range of another compatible program.“EVERYTHING A TOOL, ANYTHING A WEAPON”
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