What is it?

Based on Freematics ESPRIT C3, the ESP32-C3 dev board in Arduino UNO form factor, together with 1.3" OLED display and Freematics OBD-II UART Adapter, this kit can be programmed with Arduino (ESP32 core) and is easy to start prototyping for connected car applications.

Parts Assembly

The kit consists following parts.

• Freematics ESPRIT C3 (ESP32-C3)
• 1.3" OLED Display Module (SH1106, I2C, 128x64px)
• Freematics OBD-II UART Adapter V1

To assemble the kit,

• Plug in the OLED display into the board's I2C socket
• Connect OBD-II UART adapter to the board's serial UART pins as picture shown below

Code Uploading

The example code (simple_obd_display) can be downloaded here or obtained from Github. The download zip file also contains libraries for the OLED display and Freematics OBD-II UART Adapter. The code runs as car live data display. Once the OBD-II adapter is connected to a car's OBD port, it powers up the kit and live data from the car will be displayed on the OLED display.

The board comes with the code pre-flashed so the kit will work right away after assembled and powered.

Uploading code with Freematics Builder

• Download and install Freematics Builder
• Connect Freematics Esprit board to computer by USB cable
• Launch Freematics Arduino Builder
• Click Load Sketch button to load simple_obd_display.ino
• Choose Freematics Esprit C3 as board type
• Click on serial port to start compiling and uploading

Uploading code with PlatformIO

• Download and install Visual Studio Code and PlatformIO extension
• Connect Freematics ESPRIT board to computer by USB cable
• Launch Visual Studio Code
• Click on File menu and then Open Folder
• Choose the folder containing the .ino file
• Click upload button on toolbar to start uploading

Shipping List

• Freematics ESPRIT C3 Dev Board *1
• Freematics OBD-II UART Adapter V1 *1
• 1.3" I2C OLED module *1
• USB Type C cable *1

Links

• Arduino code and libraries (github)
• Freematics ESPRIT-C3 Dev Board