Bluetooth allows for data transfer from the source to the receipt when both are connected via Bluetooth. It acts much like an invisible cord between the two devices by creating a secure, wireless personal area network in which these devices can communicate.
This technology is used to exchange data over short distances up to 10-meter (33-foot) radius wireless network, called a personal area network (PAN) or piconet. At present PAN can be created between two to eight devices.
One Master device (Host Device) can connect to seven slave devices. Any slave device in the piconet can only be connected to a single master. Slaves are only allowed to transmit to and receive from their master. They can’t talk to other slaves in the piconet.
You can enjoy music with your Bluetooth Headphone when your Bluetooth smartphone is in another room. In my mac, my keyboard and mouse are connected to mac through Bluetooth. It is very convenient!!
Profiles are definitions of possible applications and specify general behaviors that Bluetooth® enabled devices use to communicate with other Bluetooth devices.
Profiles build on the Bluetooth standard define what kind of data a Bluetooth module is transmitting. The device’s application determines which profiles it must support, from hands-free capabilities to heart rate sensors to alerts and more.
Bluetooth specifications define how the technology works, profiles define how it’s used.
When embedding this technology in a device, a “Profile” is allocated to a device called Classic or Smart profile. These devices are called Bluetooth Smart or Bluetooth Classic devices.
Bluetooth Smart devices is a low energy version and work on a different protocol than classic Bluetooth devices. Gadgets like smartphone, Headphone, laptop, printer, PDAs, Cameras are classic Bluetooth devices, Wearable, peripheral devices, as well as all other items that extend our smartphone’s functionality like smartwatches are Bluetooth smart devices.