Dynamixel

https://www.seeedstudio.com/blog/2019/12/11/rs232-vs-ttl-beginner-guide-to-serial-communication/

Used 3 kinds of motors:

XL330

• https://emanual.robotis.com/docs/en/dxl/x/xl330-m288/

Daisy Chaining with dynamixel

https://en.robotis.com/model/download.php?bo_table=robotis_faq_en&wr_id=53&no=0&sca=DYNAMIXEL

“DYNAMIXEL servos utilize multi-drop, half-duplex serial connections in either the TTL (for models ending in -T) or RS-485 (for models ending in -R)“.