DFRobot Veyron Manual page 13

In UART open loop control mode, the parameters associated with the actual control are as follows:
direction mode, PWM signal generating method, Starting zero signal detection, control signal mode,
discontinuous mode time limit, the maximum permissible continuous current, the maximum
permissible peak current limit, the maximum allowable temperature and voltage. Please refer to
instruction set, set those depending on the configuration needs, when the configuration is completed,
you can control the motor with voltage signal.
Close-loop control mode
Connect the cable, as shown in the figure (Connect one circle if you only control one motor):
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