%A Trung Ninh Bui %A Duc Huy Luong %A Viet Hung Nguyen %T Building an automobile accident detection and messaging system using Arduino %X In Vietnam, the number of traffic vehicles and traffic accidents is increasing. Currently, in the mid-tier model and below, there is no warning and rescue system that is equipped to deal with vehicle crashes, especially when it occurs at night. It is difficult for people in distress and can even lead to death in some emergencies. In this paper, we propose to build a model of automobile accident detection and messaging system using Automatic utilizing Accelerometer sensor, GPS module, and GSM module. The experimental test results show that the system works well, the response time is fast and the price is cheap. It is suitable for installation on vehicles in Vietnam in the future. %C University of Transport Technology, HN %D 2021 %L SisLab4253