Changelog

3.6.0b2 - 2024-10-15

Allow color objects to be iterated as h, s, v = color_object or indexed
as color_object[0]. This allows access to these properties in block
coding (support#1661).
Added observe_enable to the hub BLE class to selectively turn observing
on and off, just like you can with broadcasting (support#1806).
Added hub.system.info() method with hub status flags (support#1496) and
value representing how the program was started.

Relaxed speed limit from 1000 deg/s to 1200 deg/s for external Boost
motor (support#1623).
Make broadcast_channel optional instead of defaulting to 0.

Fixed persistent data not being deleted when swapping
from 3.6.0b1 to 3.5.0 and back to 3.6.0b1 (support#1846).
Fixed controls stopping if use_gyro is called again with the same
argument as already active (support#1858).
Fixed lockup and reboot with f-strings and slice allocations in tight
loops (support#1668).
Fixed program restarting if the stop button was held to end the program
without an exception (support#1863).
Fixed program lockup when restarting a hub light or light matrix animation
at exact multiples of its animation interval (support#1295).

Allow Bluetooth to be toggled off and on with the Bluetooth button on the
Prime Hub and the Inventor Hub (support#1615), and have this state persist
between reboots.
Added heading_correction to hub.imu.settings to allow for automatic
correction of the hub.imu.heading() value (support#1678).
Added update_heading_correction to interactively set the heading
correction value (support#1678).
Added optional one byte program identifier to program start command.
For now, this is added to start various builtin
programs, but it prepares for the ability to start different downloaded
programs too (pybricks-micropython#254).
Added one byte program identifier to the hub status report to the host.
Added interface and implementation for storing and selecting multiple code
slots on the Prime Hub and Inventor Hub.
Added ability to set distance and angle in DriveBase.reset(). If the
DriveBase is using the gyro, it will be set to the same angle. (support#1617).
Added DriveBase.arc method with more intuitive parameters to drive along
an arc, to eventually replace DriveBase.curve (support#1157).

Changed protocol to Pybricks Profile v1.4.0.
When upgrading the firmware to a new version, the user program will now
be erased. This avoids issues with incompatible program files (support#1622).
The angular_velocity_threshold, and acceleration_threshold settings
in hub.imu.settings are now persistent between reboots.
Reduced hub poweroff time from 3 to 2 second to make it easier to turn off
the hub (pybricks-micropython#250).
Improved font for the digits 0--9 when displaying them
with hub.display.char(str(x)) (pybricks-micropython#253).
On SPIKE Prime Hub and Robot Inventor Hub, moved Bluetooth indications to
the Bluetooth light. Only warning lights will be shown on the main button
light. See (support#1716) and (pybricks-micropython#261).
Allow gyro calibration only while all motors are coasting (support#1840) to
prevent recalibration during very steady moves (support#1687)
Reduced default angular velocity stationary threshold from an undocumented
5 deg/s to 3 deg/s to reduce unwanted calibration while moving (support#1105).
If imu.reset_heading() is called while a drive base is actively using the
gyro, an exception will be raised (support#1818).

Fixed not able to connect to new Technic Move hub with LWP3Device().
Removed gc_collect() from tools.run_task() loop to fix unwanted delays.
Fixed await wait(0) never yielding, so parallel tasks could lock up (support#1429).

Removed loop_time argument to pybricks.tools.run_task as this wasn't
having the desired effect, and would cause loop round trips to take 10 ms
for every await wait(1) (support#1460). This was an undocumented feature.