Diseño de un panel para visualizar los datos de la tarjeta mobydic4910 obtenidos a través del protocolo de comunicación can bus

Abstract

At present the world has been catapulted thanks to technology, which goes hand in hand with the development of the automotive industry, having great advances in digital technology that carries the vehicle, innovation opens doors for continuous improvement, with the Implementation of engines with more electronic technology, increases the number of sensors, a greater number of data and failures that can occur, for which an analog board cannot present these new variables since it shows the basic information of the vehicle. In Ecuador, most vehicles have analog technology in their tachometer, this being a technology that does not show the complete data of the vehicle, for which the focus of this project is the construction of a digital dashboard that allows reading the data from a card that simulates the ECU (mobydic 4910) of a vehicle, through Arduino that connects with an ELM327 module and transfers the data obtained from the ECU to a Nextion screen. The main objective is to establish a bidirectional communication between the mobydic 4910 board and a microcontroller using an ELM327 adapter. This adapter, connected to the vehicle's OBDII port, allows access to relevant data from the card's sensors. The code used is based on two libraries SoftwareSerial and ELMduino to establish serial communications with the ELM327 adapter and a display device, in this case a Nextion panel. Two SoftwareSerial objects are created, one for communication with the ELM327 adapter and one for communication with the Nextion panel. Once communication is established, the code queries through the ELM327 adapter to obtain specific parameter values from the card, such as engine RPM, coolant temperature, vehicle speed, fuel level (for both mode diesel and gasoline mode) and fault code detection. These parameters are used to monitor and display ECU data in real time.