How the Hong Kong Protesters Communicate

How do you organise protests when your government wants to block or cut your Internet connectivity?  Well, the answer appears to be to use Firechat.  Firechat is an app available for Andrioid and IOS devices and is produced by Open Garden, on the surface it's just another in a long line of Internet connected social media chat apps but the real uniqueness is when your Internet connection is no more.  By switching on your phone's Wifi and Bluetooth connections you immediately become part of a local social mesh network communicating with other Firechat users up to 200 feet away and they can then subsequently become a new node in the network relaying the messages around the extended local mesh.  It may be the new enemy of dictatorial regimes around the world.