> For the complete documentation index, see [llms.txt](https://docs.morsemicro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.morsemicro.com/software-releases/halowlink2-software-release-notes.md). # HaLowLink2 Software Release Notes v3 3.2.3 [Download as PDF](https://www.morsemicro.com/resources/software_releases/linux/halowlink2/HaLowLink2-Software-Release-Notes.pdf)
## 1 Overview This document provides an overview of changes and improvements for the latest OpenWrt software release for the HaLowLink 2. HaLowLink 2 is Morse Micro's Wi-Fi HaLow (802.11ah) access point and extender platform, designed for long-range, low-power IoT connectivity. The software runs on OpenWrt and is managed through the device's web-based user interface. To upgrade your device, navigate to the Upgrade page in the web UI. An active internet connection is required. Support for the 2 MHz channel option and the restriction enforcing 'Auto' mode in the EU regulatory domain have been discontinued effective from Release 3.2.3. The 2 MHz configuration was certified under the polite spectrum access route of EN 300 220-2 V3.1.1, which does not test or validate any duty cycle, so there is no measured basis for the 10% duty cycle it was run at. Because 2 MHz exceeds the 1 MHz occupied bandwidth cap for band 84, it falls instead under the non-specific SRD entries, which permit only a 0.1–1% duty cycle, which is far below 10%, and no EU provision anywhere allows 2 MHz at 10%. With V3.1.1 also being withdrawn on 11 June 2027, full regulatory compliance required aligning with EN 304 220 at 1 MHz, resulting in the removal of 2 MHz channel support in the EU region. ## 2 Software Change Summary ### 2.1 Release 3.2.3 Release 3.2.3 is the next maintenance release for HaLowLink 2 after release 2.11.13. It updates the MM8108 driver and firmware package to version 2.1.0, as well as the underlying OpenWrt version from 23.05.6 to 24.10.5. #### 2.1.1 New Features * Upgraded MM8108 driver and firmware from 1.17.9 to 2.1.0 * Added a new Link Metrics diagnostic tool within the Web GUI * Updated OpenWrt version from 23.05.6 to 24.10.5 * Updated the Linux kernel from v5.15.167 (with v6.1.110-1 mac80211 backport) to v6.6.119 (with v6.12.61 mac80221 backport). #### 2.1.2 Feature Improvements * Removed the 2MHz channel & the 'Auto' only restriction in EU * Enabled airtime fairness to improve downlink balance in multi-station setups and resolve medium monopolization. * Upgraded the dnsmasq package to resolve multiple security vulnerabilities (CVEs) * GUI stability and usability enhancements: * Resolved frequency list inaccuracies in iwinfo for EU and AU2024 regulatory domains * Fixed a uhttpd crash causing intermittent web interface loading failures #### 2.1.3 Known Issues * Transient throughput drops detected in multi-hop 802.11s Mesh networks * The wireless link self-heals within approximately 2 seconds without requiring manual intervention Please refer to the Linux Software Release Notes for comprehensive details regarding the new features and known issues introduced in the 2.1.0 (MM8108) driver/firmware update. ### 2.2 Release 2.11.13 Release 2.11.13 is a maintenance release for HaLowLink 2 following release v2.11.12. It updates the MM8108 driver and firmware package to version 1.17.9, which fixes the reported security vulnerabilities. There are no new end-user features in this release. #### 2.2.1 New Features * There are no new features in this release. The MM8108 driver and firmware have been updated to version 1.17.9; this update delivers the security improvements described below and introduces no new end-user functionality. * For a full list of MM8108 driver features, refer to the MM8108 Linux Software Release Notes (1.17.9). #### 2.2.2 Resolved Issues and Improvements **2.2.2.1 Security compliance improvements** * Hardened parsing of 802.11 management-frame information elements (IEs) against malformed input: * Added bounds validation for vendor-specific IE lengths, preventing out-of-bounds reads. * Protected against a buffer overflow when parsing the Traffic Indication Map (TIM) information element. * Protected against a buffer overflow when parsing the S1G Capabilities information element. #### 2.2.3 Known Issues All known issues reported in release 2.11.12 are carried forward unchanged into 2.11.13; this release does not resolve any of them. They are listed again below for completeness. **2.2.3.1 Unbalanced downlink distribution in multi-STA scenarios** * In multi-STA setups, an unbalanced downlink distribution may be observed when traffic is sent simultaneously to more than four stations, with the first two associated stations potentially monopolizing the medium. * Workaround: Enable airtime fairness on the HaLowLink 2 (enable\_airtime\_fairness=1). **2.2.3.2 Receive degradation at 2 MHz near -73 dBm RSSI** * Some degradation is observed at 2 MHz, with an RSSI of approximately -73 dBm. * Workaround: Increase or decrease the RSSI by 2 dB to resolve this issue. **2.2.3.3 Receive degradation at 1 MHz at strong signals** * Some degradation is seen at 1 MHz at strong signal levels. * Workaround: Move the devices farther apart to lower the signal strength. **2.2.3.4 Intermittent STA association failure at very close range** * When pairing two devices at very close range, the STA may intermittently fail to join the HaLowLink 2 due to excessively strong received signal levels (greater than -10 dBm). * Workaround: Ensure a minimum separation of 2 meters between the HaLowLink 2 and STA before initiating the pairing sequence to maintain reliable association. An improvement is planned for a future firmware release. ### 2.3 Release 2.11.12 Release 2.11.12 is the first maintenance release for HaLowLink 2 following the production release v2.11.8. It includes security compliance improvements, stability fixes for high-density deployments, and an updated MM8108 driver and firmware package. There are no new end-user features in this release. #### 2.3.1 New Features * There are no new features in this release. The MM8108 driver and firmware have been updated to version 1.17.8; however, all features introduced in that driver version were already available in the HaLowLink 2 production release v2.11.8. * For a full list of MM8108 driver features, refer to the MM8108 Linux Software Release Notes v2 (1.17.8). #### 2.3.2 Resolved Issues and Improvements **2.3.2.1 Security compliance improvements** * Updated OpenSSL configuration to meet current security standards, ensuring compatibility with stricter TLS requirements and audit criteria. * Addressed a CWE-125 security weakness. **2.3.2.2 Multi-STA performance** * Multi-STA performance has been improved for up to 8 stations. * Improved interference performance in AP mode: beacon transmission is now maintained under high levels of adjacent-channel interference. * Enhanced stability in high-density deployments: resolved a firmware crash that could occur when operating with 32 or more connected STAs. **2.3.2.3 Documentation** * The user guide now lists all open network ports, with justification and usage context for each. #### 2.3.3 Known Issues **2.3.3.1 Unbalanced downlink distribution in multi-STA scenarios** * In multi-STA setups, an unbalanced downlink distribution may be observed when traffic is sent simultaneously to more than four stations, with the first two associated stations potentially monopolizing the medium. * Workaround: Enable airtime fairness on the HaLowLink 2 (enable\_airtime\_fairness=1). **2.3.3.2 Receive degradation at 2 MHz near -73 dBm RSSI** * Some degradation is observed at 2 MHz, with an RSSI of approximately -73 dBm. * Workaround: Increase or decrease the RSSI by 2 dB to resolve this issue. **2.3.3.3 Receive degradation at 1 MHz at strong signals** * Some degradation is seen at 1 MHz at strong signal levels. * Workaround: Move the devices farther apart to lower the signal strength. **2.3.3.4 Intermittent STA association failure at very close range** * When pairing two devices at very close range, the STA may intermittently fail to join the HaLowLink 2 due to excessively strong received signal levels (greater than -10 dBm). * Workaround: Ensure a minimum separation of 2 meters between the HaLowLink 2 and STA before initiating the pairing sequence to maintain reliable association. An improvement is planned for the next firmware release. ## 3 Revision History | Version Number | Release Date | Release Notes | | -------------- | ------------ | ----------------------- | | 1 | 24 Apr 2026 | Release OpenWrt 2.11.12 | | 2 | 04 Jun 2026 | Release OpenWrt 2.11.13 | | 3 | 18 Oct 2026 | Release OpenWrt 3.2.3 |