Using Raspberry Pi Pico with u2d2 board

@Yahya_amirinejad

As Kneave stated, the RaspberryPi Pico is not compatible with the U2D2 controller.

You may be able to implement one of the solutions suggested by roboteer and control your DYNAMIXELs directly from the UART of the Pico. If you do go this route, then this community page post may be helpful in establishing UART communications.