UART controls odrive

1

I am using hardware version v3.6-56v, software version 0.5.1, sending commands through serial port

  1. Speed mode v 0 10 motor operates normally
  2. Position mode p 0 100 motor normal operation
  3. Torque mode t 0 1 motor operates normally
    But when I send f 0, odrive has no feedback speed and current position to me. When I send f 0, I can’t receive any information. Why didn’t I do it well?