Looks like they are writing in some kind of code....

Winning 🏆

A metro carriage is close to the ideal case for a Bluetooth mesh. A few dozen radios inside ten metres means every hop is cheap and nothing waits long for a repeater. The catch is that the same density saturates a flood mesh, since every device rebroadcasts to everyone it can hear. So the peer count...

It's interesting to see digital channels like Bitchat becoming a hub for real-world organization. Does the ephemeral nature of these chats influence the spontaneity or coordination style of the demonstrations?