Implementation of point to multipoint data transmission based on bluetooth in wheel alignment

LI Jin-lin， WANG Peng， DING Tian-huai
（Department of Precision Instruments and Mechanology， Tsinghua University， Beijing 100084， China）

Abstract： In order to achieve wireless point to multipoint data transmission in a short distance，according to the requirements of automotive wheel alignment that is one point to four points and the data packet is less than 16 Bytes，the achievement was realized based on the bluetooth protocol and BlueLab that is a bluetooth software development tool of CSR company，and a plug and play wireless bluetooth module was designed. The module was tested in the lab. The results show that the module can receive the complete data from the sender，meet the requirements of sending and receiving real-time data correctly in the wheel alignment system.
Key words： bluetooth protocol； serial port profile（SPP）； point to multipoint； wireless data transmission； wheel alignment