Diseño e implementación de un sistema de extracción y almacenamiento de parámetros de funcionamiento del automóvil en tiempo real basado en los protocolos de comunicación OBD-II.

Abstract

In the current research project, a system for extracting vehicle operating parameters based on the OBD-II communication protocol and cloud storage was designed. For this, the communication protocols supported by the OBD-II standard were investigated and the technologies related to storage and real-time monitoring. Afterward, the prototype was developed once all the technical considerations and user requirements had been taken into account. The prototype has two stages, which fulfill specific functions and correct the entire system's correct operation. The transmission stage is made up of a Raspberry Pi 3 development card, a UBLOX NEO M-8-N-0-01 GPS module, a Huawei E303C GPRS module, a Bluetooth v4.0 Dongle, and an ELM327 v2.1 reader. All of these components are inside a box for easy portability. This stage is responsible for acquiring the data from the vehicle's sensors through the OBD-II reader and coordinating coordinates and height using the Global Positioning System (GPS). These data were processed with the Python language on the Raspberry Pi and sent in real-time through the Internet using a mobile operator's GPRS network. The reception stage is the web server, which is in charge of storing and viewing the received data, creating a web page that allows the requested parameters to be displayed in real-time using meters and dynamic graphs. Once the prototype was implemented, functional tests were carried out in three scenarios simulating natural environments. In these scenarios, the application is possible due to the traffic that allows the variation of data from the vehicle's sensors as well as the variation in height. So, it was possible to determine its performance and reliability when comparing the collected sensor data with those from the vehicle dashboard.