Bluetooth Core Specification Version 2.1, referred to as Basic Rate/Enhanced Data Rate (BR/EDR), made it easier for consumers to connect Bluetooth devices.
With the introduction of simple, secure pairing, Version 2.1 allowed consumers to select "add Bluetooth device" from a connection menu to let devices automatically find and connect to each other.
Difference between basic rate and enhanced data rate
The Bluetooth® RF (physical layer) operates in the unlicensed ISM band at 2.4GHz. The system employs a frequency-hop transceiver to combat interference and fading, and provides many frequency hopping spread spectrum carriers. Basic Rate supports a bit rate of 1 Mbps while Enhanced Data Rate supports a gross air bit rate of 2 MBps.
- Bluetooth Specification Version 2.1 + EDR can increase battery life in devices such as mice and keyboards by up to five times.
- For pairing scenarios that require user interaction, eavesdropper protection makes a simple six-digit passkey stronger than a 16-digit alphanumeric character random PIN code. Version 2.1 also offers man-in-the-middle protection that eliminates the possibility for an undetected third party to intercept information.
- Pairing enhancements in Version 2.1 enable the use of near field communication (NFC), allowing communication between devices when touched together or brought into close proximity.