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4.5.5

coleam00/Archon4.5.5Jun 28, 2026by blckmn

AI Summary

This release focuses on refining the Multi-Serial Port (MSP) module by fixing the logic for canceling pending requests and restoring per-byte lastActivityMs tracking.

Key Highlights

  • Fix MSP pending request cancellation logic
  • Restore per-byte lastActivityMs functionality
  • Betaflight firmware maintenance update

Full Release Notes

<!-- Release notes generated using configuration in .github/release.yml at 4adbd3ef7cb546947600e5f747bd5453c9573063 -->

## What's Changed
### Fixes
* [4.5] fix(msp): cancel pendingRequest on '$' only, restoring per-byte lastActivityMs by @nerdCopter in https://github.com/betaflight/betaflight/pull/15330


**Full Changelog**: https://github.com/betaflight/betaflight/compare/4.5.4...4.5.5