Bluetooth IC selection：CC2640R2FTWRGZRQ1 QFN48 7*7 IC

Modulation mode:GFSK

Bluetooth module size: 40 (L) * 20 (W) * 4 (H) mm

Frequency range: 2402~2480MHZ (2.4G ISM band)

Communication interface: LIN

IC RF TX power range can be set by software programming: -21~ +5 dB

Frequency offset value: RF ± 60ppm, MCU clock 32.768KHz ± 350ppm (using crystal mode)

Assembly features: waterproof structure

Supply voltage: 10V~26V DC

Bluetooth protocol stack: BLE 4.2, support for upgrading to 5.0

Bluetooth chip: CC2640R2FQ1 (car grade)

Transmitting power: -21dBm~+5dBm

Receive sensitivity: -97dBm

Standby power consumption: 3.6uA (CacheRTC operation and RAM hold)

Working temperature: -40 ° C ~ +105 ° C

Program overview

The keyless entry and start system, referred to as the PEPS system, uses advanced radio frequency technology to unlock the Automotive door and enter the vechile without the need to operate the car's remote control key. Under the existing technical conditions, PEPS has more intelligent access control management and higher anti-theft performance, and has gradually become the mainstream of automotive electronic anti-theft system applications. However, with the vigorous promotion and development of the new energy automobile industry in recent years, the Automotive networking process has been accelerating, and more and more IoT innovation technologies have been used in Vechiles, People are constantly proposing new conveniences for traveling. The demand not only realizes the interconnection and mapping between the Vechile and the mobile phone, but also the unlocking and starting of the car, and hopes to complete it with the mobile phone. In addition, the driver's license and the driving license are electronically trended, and the car can be started by simply carrying the mobile phone.

Therefore, Shenzhen Shengrun Technology Co., Ltd. has launched a Bluetooth antenna solution based on TI's Automotive-grade Bluetooth chip CC2640R2F, which cooperates with the automotive manufacturer to provide service for automotive electronic systems. Through cross-technology integration, mobile phone keyless entry and keyless start-up the new Bluetooth PEPS solution. By deploying multiple Bluetooth antennas around the automotive, the mobile phone APP captures the broadcast signal strength of the Bluetooth, and combines the algorithm to determine the location of the mobile phone from the vehicle, thereby performing functions such as unlocking or locking the car and starting the engine.