GreenBox: Prototyping of an Automatic Road Accident Detection System with Real-Time Notification SMS

Abstract: The Internet of Things (IoT) project, called "GreenBox", proposes the development of a prototype for the detection of road accidents, using sensors and actuators connected to an Arduino Uno and a Global System for Mobile Communications (GSM) card with 4G support, SIM7600G-H (global version) from DF-Robot. This system sends Short Message Service (SMS) to pre-established contacts, alerting, for example, family or friends, so that they immediately contact emergency entities in the event of an accident and provide them with all the necessary information, such as the location of the vehicle. The sensors include four push-buttons, with a resistance of 10kΩ, in order to define their default logical state, representing impact or impact sensors for each side of the vehicle; two water level sensors for the engine compartment and trunk; and a gyroscope/accelerometer to detectrollover from a 70 degrees inclination. The prototype also has a relay that is activated to turn off the engine in the event of a detected accident, preventing further damage. The GSM board has a Global Positioning System (GPS) antenna attached, allowing it to locate the vehicle and determine its speed, moments before the possible accident. The system also allows you to turn off the vehicle via SMS in case of theft. The entire project is prepared for the owner, for example the driver of the vehicle, to cancel all automation, via SMS, in case of false accident detection. Rollover detection is calculated using the arctangent of the accelerometer values and instructions for sending notifications are carried out by AT (Attention Commands) commands, between the microcontroller and the SIM7600 shield.