Today I will introduce the board used TurtleBot3.
This board is called OpenCR.
OpenCR support ROS and also Arduino IDE.
It has communications interfaces, including USB, which communicates with the PC, and UART, SPI, I2C, CAN for other embedded device.
And various Sensors too.
Opencr has a lot of possibilities.
It’s also used on TurtleBot3 and other robots.