[Bug] XboxController sometimes gives RuntimeError when connecting with SPIKE

[laurensvalk]

Describe the bug Sometimes you have to restart the program to connect. Trying again always works, so this is probably something we can catch and resolve in the bluetooth_btstack driver.

To reproduce Use the XboxController with one of the SPIKE hubs, and get a RuntimeError sometimes.

[stowns]

Experiencing the same. Was iterating on a project an kept having to toggle bluetooth on/off for the macbook, hub and controller to get the error to go away. But now even that as stopped working. Refreshing the chrome tab doesn't seem to help either. I haven't yet restarted the machine completely but this seems like an issue.

from pybricks.iodevices import XboxController
from pybricks.parameters import Direction, Port
from pybricks.pupdevices import Motor
from pybricks.robotics import DriveBase

# Set up all devices.
left_wheel = Motor(Port.A, Direction.COUNTERCLOCKWISE)
right_wheel = Motor(Port.B, Direction.CLOCKWISE)
robot = DriveBase(left_wheel, right_wheel, 56, 128)
controller = XboxController()


# The main program starts here.
while True:
    if controller.triggers()[1] > 0 or controller.triggers()[0] > 0:
        robot.drive(10 * controller.triggers()[1] - 10 * controller.triggers()[0], controller.joystick_left()[0])
    else:
        robot.stop()

Error

Traceback (most recent call last):
  File "setup_demo.py", line 11, in <module>
RuntimeError: Unknown error