Abstract:This paper introduces a steering wheel control system based on the Bluetooth. Taking advantage of the Bluetooth, we can realize the optimal design of electronic switchings on the steering wheel panel, so the problem that we have to look down to find the switch in the past can be overcome, and we could achieve most of the operation on the steering wheel. At the same time, the driving is more convenient. The control system uses the Bluetooth module based on the BC219159 Bluetooth chip. The master control device uses the STC89LE516 as the controller, which collect the instructions from the button fixed into the steering wheel, and then, it sends the instructions to the Bluetooth chip which sends the signal by the way of wireless; when the slave device receive the signal, the slave chip STC89C516 send corresponding instructions which are based on the different signal, making use of the CAN bus to control the four systems that the air conditioning, the sound, the cruise, the lights, and because the LCD is used, the drivers can use the system more easily. The system utilizes the PWM to control the strength of each control function. Hence, the cost of the hardware is less. The trial proves the system has the advantages of low cost, reliability, safety and interchangeability.