Whats the function of a blue tooth
In its basic rate (BR) mode, the modulation is Gaussian frequency-shift keying (GFSK). It can achieve a gross data rate of 1 Mbit/s. In extended data rate (EDR) /4-DQPSK and 8DPSK are used, giving 2, and 3 Mbit/s respectively.
Bluetooth is a packet-based protocol with a master-slave structure. One master may communicate with up to 7 sla ...more
When any two devices need to talk to each other, they have to agree on a number of points before the conversation can begin. The first point of agreement is physical: Will they talk over wires, or through some form of wireless signals? If they use wires, how many are required -- one, two, eight, 25? Once the physical attributes are decided, several more questions arise:
* How much data will be sent at a time? For instance, serial ports send data 1 bit at a time, while parallel ports send several bits at once.
* How will they speak to each other? All of the parties in an electronic discussion need to know what the bits mean and whether the message they recei ...more