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Accidents of varying degrees such as garage displacement, scraping and rear end collision caused by poor grasp of the steering angle of automobile steering wheel. The device can help drivers and beginners to monitor the direction of the steering wheel in real time and reduce the incidence of traffic accidents. Design and implementation of automobile steering wheel angle display based on STM32 single chip microcomputer the functions of the system include automobile steering wheel angle detection, key control, data display, WiFi communication and alarm prompt. The system collects the steering wheel angle data. If the steering wheel angle data exceeds the set threshold, it will be prompted by audible alarm. You can use the key to adjust the steering wheel angle threshold. The system functions are tested one by one, and the test results show that it fully meets the functional requirements of the original design. This set of equipment can not only bring convenience to the teaching of beginners and coaches, but also provide reference for the intellectualization of driving school coach equipment.