When two devices need to talk to each other, they need to have a handshake on various parameters before the conversation starts. The first agreement is on the medium – will they use wires, or talk over some wireless signal? Bluetooth is one such wireless signal (protocol) over which two (or more) devices communicate over.
Strange name though isn’t it – are the bluetooth waves invisible but blue and shaped like teeth? Wrong! There is absolutely no relation between the name and the meaning.
The Bluetooth protocol was created by Ericsson (pre-Sony Ericsson) which is a major Swedish telecommunication company. They named it after the Danish viking king, Harald Bl