Copter-4.5.3 has been released as the stable/official version for multicopters and traditional helicopter and can be installed using Mission Planner, QGC or downloaded directly from firmware.ardupilot.org.
The changes vs 4.5.2 can be seen in the ReleaseNotes and they’re also copied below.
- Board specific enhancements and bug fixes
- correct default GPS port on MambaH743v4
- added SDMODELV2
- added iFlight Blitz H7 Pro
- added BLITZ Wing H743
- added highres IMU sampling on Pixhawk6X
- System level minor enhancements and bug fixes
- fixed rare crash bug in lua scripting on script fault handling
- fixed Neopixel pulse proportions to work with more LED variants
- fixed timeout in lua rangefinder drivers
- workaround hardware issue in IST8310 compass
- allow FIFO rate logging for highres IMU sampling
- Copter specific changes
- fixed speed constraint during avoidance backoff
- zero D_FF during autotune twitch
The most important fix is the Lua script related item bolded above. It is very rare but in some unfortunate cases, if the lua script stopped it could cause the main C++ code to fail as well.
Thanks to the developers and beta testers who contributed to this release!