# RELEASE NOTES 20 April 2022 - Apache NimBLE v1.5.0 For full release notes, please visit the [Apache Mynewt Wiki](https://cwiki.apache.org/confluence/display/MYNEWT/Release+Notes). Apache NimBLE is an open-source Bluetooth 5.3 stack (both Host & Controller) that completely replaces the proprietary SoftDevice on Nordic chipsets. New features in this version of NimBLE include: * Fake dual-mode option for controller * LLCP tracing via HCI events * Code size optimization for disabled GAP roles * Support for PA/LNA * LE Secure Connections Only mode * Support for Bluetooth Core Specification 5.3 * Connection subrating * BabbleSim support * Various bugfixes and improvements If working on next-generation RTOS and Bluetooth protocol stack sounds exciting to you, get in touch, by sending a mail to the Apache Mynewt Developer's list, dev@mynewt.apache.org.