Welcome to Betaflight 4.5.0-RC4

This is the fourth and likely final Release Candidate for 4.5.0.

Release notes for 4.5.0 are here: https://betaflight.com/docs/wiki/release/Betaflight-4-5-Release-Notes

IMPORTANT: Make sure you install and use the latest version of the Betaflight Configurator (10.10.0-RC4) before updating your firmware.

Don't forget to check it out all the documentation on http://betaflight.com/.

What's Changed

Improvements

• Fix bmp388 spi (and add BMP390) by @ledvinap in https://github.com/betaflight/betaflight/pull/13458
• Extend build info with defined flags by @atomgomba in https://github.com/betaflight/betaflight/pull/13333
• Add support for SPL07_003 barometer - based on DPS310 by @haslinghuis in https://github.com/betaflight/betaflight/pull/13427
• Add resource for LPUART by @haslinghuis in https://github.com/betaflight/betaflight/pull/13306
• mag cal improvements by @ctzsnooze in https://github.com/betaflight/betaflight/pull/13487

Fixes

• In GPS Rescue current altitude mode, ensure that return height is not less than climb height by @ctzsnooze in https://github.com/betaflight/betaflight/pull/13276
• Fix #13452 Write gps altitude to blackbox as signed value (was unsigned) by @tbolin in https://github.com/betaflight/betaflight/pull/13453
• Render spec screen over normal OSD by @SteveCEvans in https://github.com/betaflight/betaflight/pull/13460
• Use intptr_t for casting void * to an integer by @SteveCEvans in https://github.com/betaflight/betaflight/pull/13463
• Fix qmc5883l lockup by @ledvinap in https://github.com/betaflight/betaflight/pull/13467
• Improve IMU responsiveness, refactor by @ctzsnooze in https://github.com/betaflight/betaflight/pull/13373
• Add ez_landing_speed parameter by @tbolin in https://github.com/betaflight/betaflight/pull/13411
• Use PDOP consistently, since it replaces HDOP by @ctzsnooze in https://github.com/betaflight/betaflight/pull/13477
• Fix config write by @ledvinap in https://github.com/betaflight/betaflight/pull/13503
• Blackbox - use llog2 instead of LOG2 by @ledvinap in https://github.com/betaflight/betaflight/pull/13495
• Baro and Mag driver check for I2C bus being busy by @SteveCEvans in https://github.com/betaflight/betaflight/pull/13509
• Fix for ITCM overflow for F722 by @blckmn in https://github.com/betaflight/betaflight/pull/13521

New Contributors

• @RoboSchmied made their first contribution in https://github.com/betaflight/betaflight/pull/13398

Full Changelog: https://github.com/betaflight/betaflight/compare/4.5.0-RC3...4.5.0-RC4