In a passive-entry-passive-start (PEPS) automotive system using Bluetooth® Low Energy technology, drivers enter their car and start the electric motor (or engine, in the case of an internal combustion engine) using a key fob that communicates with the car’s access systems, instead of a key.
Generic Attribute Profile (GATT) is built on top of the Attribute Protocol (ATT) and establishes common operations and a framework for the data transported and stored by the Attribute Protocol.  For more information on GATT, please refer to Volume 0, Section 6 of the Bluetooth® Core Specification.
 
To use the RX23W Bluetooth feature, a protocol stack conforming to the Bluetooth specification is required. Also, the Bluetooth-compliant profiles and mesh software enhance your Bluetooth product interoperability in a wide application area.
Bluetooth® Low Energy Wireless Solution to Accelerate Realization of IoT of Embedded Devices.

Single chip Bluetooth® 5.0 Low Energy application controller using popular ARM Cortex M4 core with dedicated Secure Crypto Engine

 
The SimpleLink CC2640R2 Software Development Kit (SDK) delivers components that enable engineers to develop applications on the Texas Instruments SimpleLink Bluetooth Low Energy CC2640R2F wireless MCU. This powerful software toolkit provides a cohesive and consistent software experience for all SimpleLink CC2640R2F users by packaging essential software components such as the Bluetooth low energy (BLE) protocol stack, TI-RTOS kernel and TI Drivers in one easy-to-use software package along with exhaustive documentation.