Version Identification 

• OTA file version: 02300422
• Application: 2.3.0
• Stack: 4.2.2

New in version 2.3.0

• Various enhancements and improvements provided by the stack roll-up (see stack change log for details)

ubisys Compact7B Stack Changes between 4.1.2 and 4.2.2

• Common Functionality
  • Persistent Storage: Improved robustness against power failures during factory resets
  • Persistent Storage: General speed optimizations for second-generation journaling token storage system. Further speed-optimizations for garbage collection and progressive, piecemeal maintenance for improved responsiveness
  • Push-button event handling for next-generation hardware (settling time option)
• Zigbee Cluster Library
  • Enabled cancelling service locating processes, if needed; available for IAS Zone server, Poll Control server, OTA client and Time client clusters
  • Enabled cancelling particular outbound ZCL requests, if needed
  • Thermostat cluster: Added support for changing schedules over-the-air
  • Window covering cluster: Improved support for back-to-back “Go To Lift” commands
  • OTA client: Abort ongoing OTA download and service locating process when permanently leaving the network
  • OTA client: Clear OTA server configuration when permanently leaving the network
  • Reporting configuration: Omit target address information from persistent storage entries (experimental feature, now deprecated)
  • Fixed an issue, where a ZCL “Report Attribute” command without payload may be repeatedly transmitted (edge case, did not affect existing devices)
  • Fixed an issue, where the remaining packet capacity might have been inaccurate when assembling a ZCL frame with variable length payload (edge case, did not affect existing devices)
• Zigbee Network Core Stack
  • Enabled automatic routing loop detection and resolution
  • Accelerate retrieval of APS security material from persistent storage
  • Improved resilience against power failures when updating APS security material in persistent storage
  • Various improvements and optimizations regarding MAC data poll on sleepy end-devices
  • Various improvements and optimizations regarding indirect transmissions on routers
  • More rigid filtering on sleepy end-devices regarding unsolicited broadcast frames received while polling the parent
  • Enabled cancelling particular outbound ZDO requests pending a response, if needed
  • Now utilizing average LQA for poor parent link assessment, mitigating the impact of one-off RF disturbances
  • Ignore inbound MAC data requests during router network startup
  • Improved resilience to parent link failures during trust center link-key exchanges
  • Fixed an issue, where the next indirect transmission may have been instigated too early
  • Fixed an issue, where the master key on a trust center device or the exchanged authentication token on a router device is not reset when necessary (edge case, did not affect existing devices)

Version Identification 

• Application: 2.2.1
• Stack: 4.1.2

ubisys Compact7B Stack Changes between 4.0.3 and 4.1.2

• Common Functionality
  • Power cycle factory reset sequence timing changed to ‘10s on’, ‘10s off’, … cycles across all products and underlying platforms. This is to accommodate upcoming products and platforms and retain a unified factory reset power cycle. Significant gains in power efficiency lead to SoCs remaining powered for several seconds after the power supply has been cut
  • Enhanced input action engine to support emitting manufacturer-specific commands. These may be used, for example, to replicate Matter Generic Switch behavior in Zigbee devices for seamless bridging of inputs to Matter
  • Persistent Storage: Improve robustness against power failures during garbage collection
  • Persistent Storage: Slight tweaks to wear-levelling algorithm
• Zigbee Cluster Library
  • Added support for read attributes structured and write attributes structured. This enables unlimited configuration options for C4 and other products with programmable input configurations, including four dimmer switches, for instance
  • Added safeguards against some misbehaving third party OTA servers
• Zigbee Network Core Stack
  • Fixed an issue, where under rare circumstances, false address conflicts could have been flagged
  • Improved link status processing
  • Routing has been optimized to address certain rare edge cases and improve interoperability with some third-party devices
  • Improved resilience of trust center link-key exchange (when stack is reset)
  • Fixed an issue, where the address comparator misbehaved for some rare constellations
  • Joining and rejoining improved by adding quick MAC association retries with adjustable attempt limit
  • Processing of leave requests with certain status codes has been improved
  • Improved the behavior of leave processing while rejoining
  • Improved robustness by ignoring beacons that arrive after scanning has completed and before joining succeeded
  • Improved resilience to malformed beacon frames
  • Improved link quality assessment on certain platforms
  • Added support for new SoCs

Version Identification 

• Application: 2.1.0
• Stack: 4.0.3

ubisys Compact7B Stack Changes between 3.0.1 and 4.0.3

• Zigbee 2023 compliant (passes all compliance tests, certification pending)
  • Asymmetric key agreement before network admission with optional device interview
  • Support for all mandatory and all optional features defined in Zigbee 2023 in all possible device roles: trust center, router, sleepy end-device, non-sleepy end-device
  • Support for all cryptographic suites supported by Zigbee 2023, i.e. SPEKE/Curve25519/AES-MMO-128/HMAC-AES-MMO-128 and SPEKE/Curve25519/SHA-256/HMAC-SHA-256-128
  • Fully standard-compliant Works With All Hubs feature support retaining full compatibility with the pre-standard Amazon Works With All Hubs cluster
  • Negotiation of fragmentation capabilities
  • Fragmentation support for new ZDO commands
  • APS security frame counter synchronization
  • Standardized trust center swap-out (trust center and joined devices)
  • Standardized network-level retries, including data poll retries for sleepy end-devices
• Enhanced product-level configuration options for customized stack behavior
• Optimizations to improve routing and instant network connectivity on start-up
• Ongoing maintenance of the code base: Restructuring, refactoring and consolidating
• Round-up of bug-fixes and performance improvements

Note: This change log is a generic stack change log. Products incorporating the stack can choose to enable specific feature sets. For example, the 2023 feature set can be selectively disabled in products to support a graceful transition to Zigbee 2023 in progressive roll-outs. In addition, while the stack supports all variations of key agreement suites, end-products might support only a reasonable subset. Specifically, ubisys products will prefer SPEKE/Curve25519/AES-MMO-128/HMAC-AES-MMO-128 for all Zigbee 2023, Zigbee Direct 1.0 and digital signatures of OTA images as this suite provides the best blend of security, performance and resource utilization.

Version Identification 

• Application: 2.0.2
• Stack: 3.0.1

ubisys Compact7B Stack Changes between 3.0.0 and 3.0.1

• Bug-fix: Persistent storage format change could cause failure to load existing APS keys in some deployments. This could impact multi-hop joining. The version 3.0.1 resolves this issue.

Version Identification 

• Application: 2.0.1
• Stack: 3.0.0

ubisys Compact7B Stack Changes between 2.0.13 and 3.0.0

• Minor optimizations to internal flash write/erase flow
• Migrated to new 64-bit timer implementation across the entire stack
• Improved support for the future ZigBee Direct technology
• Consolidated support for All Hubs at the stack level, e.g., advanced parent link maintenance mechanism, beacon survey etc.
• Completed support for the proprietary All Hubs cluster
• Added support for dynamic cluster instantiation
• Completed support for Hybrid Zigbee Green Power technology
• Completed support for the Color Control cluster
• Added better programmatic control over attribute reports, enabled pausing and resuming attribute reports
• Enhanced the keep-alive mechanism for end devices via the end device timeout approach
• Make sure that APS security of incoming requests is mirrored to outgoing responses
• Extended maximum reporting interval (enabled by new 64-bit timer implementation)
• Enhancements and improvements of the Level Control cluster
• Enhancements and improvements of the Thermostat cluster
• Added support for the HMAC-SHA-256 encryption scheme
• Further modularized LZMA decompression implementation
• Added ZDO request queue support for a ZDO request command anticipating multiple responses
• Added ZCL request queue support for a ZCL request command anticipating multiple responses
• Added enhancements to the OTA server locating process
• Added support for Green Power GPDF frame encryption
• Optimized start-up LED indicator behavior, i.e. improve arbitration of LED usage between menu and status indications
• Added support for multiple handlers for the same GPIO
• Added generalized section support for multiple platforms
• Reject TC rejoin with MAC capabilities change to prevent security vulnerability (CSA incident no. 2021-ZP-0401)
• Added retry mechanism to the MAC association process for robustness in dense networks
• Explicitly set the destination PAN ID in case of injecting an unsolicited rejoin response due to address conflict (improve interoperability with 3^rd party stack)
• Reject a leave request during the startup process if a rejoin is already in progress
• Routing optimization, add weak provisional default route to trust center
• Indicate parent router link failure upon failed keep-alive mechanism by making use of the end device timeout approach
• Introduced a multi-pass priority scheme for network leave processing (improve modularity)
• Ensure factory new state when a Touch Link commissioning procedure is instigated (for devices which do not reboot)
• Improved the Touch Link commissioning process flow in case of router/end device joining (await confirmation for pending leave request)
• Improved the transition behavior for the Level Control cluster
• Color Control cluster: Improved the behavior when changing color modes
• Extended support for the Fan Control cluster
• Added support for the Basic client cluster
• Added framework support for processing ZCL Read Attributes response command
• Enhanced the behavior upon receipt of an OTA Image Notify command
• Consider the fact that All Hubs and Touch Link clusters are only optionally available
• Consider the fact that a remote OTA server might not support rate limiting
• Prohibited OTA downgrade by default
• Added support for the gateway attribute “current channel”
• Added support for I2C TAP
• Added support for a unified and fully configurable join/rejoin algorithm with back-offs and retries at the stack level
• Reject trust center rejoin on a distributed security network (CSA incident no. 2021-ZP-0401)
• Start TCLK exchange if an end device could not successfully finish TCLK exchange during its initial joining and has just rejoined
• Improved sleep management: Checking both transmission and reception queues for pending packets, if necessary
• Extended the advanced parent link maintenance mechanism by the new criterion “poor poll control reactivity”
• More granular startup progress notifications, including kick-off of a Touch Link commissioning procedure
• Stop ongoing join/rejoin retry attempts when Touch Link commissioning procedure is instigated
• Encapsulated the All Hubs cluster’s dependency on the Touch Link server, IAS Zone server and Time client clusters, for better modularity
• Added Enhancements to the Thermostat cluster
• Made the hard limit for the scene table capacity configurable
• Added support for the Relative Humidity Measurement cluster
• Added framework support for initiating enroll request and IAS zone status change indication via the ZCL request queue
• Added framework support for time query initiated by a Time client cluster
• Prohibit automatic CIE detection by default; application is still able to instigate it though should legacy systems require it
• Explicitly stop fast polling mode as soon as no more response frame is pending
• Resume network activity if a router device just failed a rejoin attempt
• Enhancement: PAN-ID and permit joining state changes are forwarded to application clusters
• Bug-fix: Idle processing requires thread-safety on some platforms
• Bug-fix: Improve co-existence of AODV and MTO routing algorithms
• Bug-fix: Under rare circumstances a pending outgoing attribute report got discarded inadvertently
• Bug-fix: OTA hash calculation must account for data chunks not arriving in-sequence
• Bug-fix: Make sure all code paths align the transmit options for default responses with the mating request
• Bug-fix: Cluster-level global flags and individual configuration options used to be not maintained persistently
• Bug-fix: Disentangle cluster-level policy settings for APS ACKs and default responses
• Bug-fix:Fixed Green Power OOB key encryption for emerging Green Power install code support
• Bug-fix: Nonce setup for GPD vs. GPS used to be incorrect (relates to Hybrid Green Power feature)
• Bug-fix: NWK short address might be invalidated after a failed TC rejoin when the NWK key material has not been received in time
• Bug-fix: Ensure resetting the startup parameters during a cold-start
• Bug-fix: Ensure resetting the network layer’s retransmission queue across stack restarts
• Bug-fix: On some platforms loss of timer ticks might occur due to internal timer resolution discrepancy
• Bug-fix: Need to only evaluate the router/end device capacity fields in a beacon payload when performing network discovery during initial joining
• Bug-fix: Startup parameters might be inadvertently dropped across startup retry attempts
• Bug-fix: Unexpected behavior might be encountered while resolving an ongoing PAN ID conflict (caused by typo)
• Bug-fix: Internal coordinator flag might have inadvertently been set while forming a distributed network
• Bug-fix: Client/server cluster role not always properly honored when accessing an attribute
• Bug-fix: Increment network update ID in course of network-wide channel change (improve interoperability)
• Bug-fix: Global ZCL commands used to be silently dropped if the APS security level was insufficient. Instead, create a proper response mirroring the incoming security and indicating insufficient privileges.
• Bug-fix: Under rare circumstances, a frame might linger in the transmission queue without being actually sent
• Bug-fix: Potential overflow of 64-bit timer values might occur when unsigned arithmetic is used for comparison of due times
• Bug-fix: During MAC association, if an unrelated frame is being received via data polling, MAC association might be incorrectly terminated; account for this case and retry if permissible
• Bug-fix: Periodical polling timer used to be unconditionally kept alive, even in case of data poll failure; temporarily cancel it to avoid interference with subsequent retry attempts. Once succeeded, the periodical polling timer will be reinstated for its normal usage.
• Bug-fix: When assessing MAC capability changes for a rejoining device verify the “Device Type” and “Receiver on when Idle” bits only
• Bug-fix: Skip route discovery table verification diagnostics in case of an end device
• Bug-fix: Limit the use of incoming APS security material to few select cases only
• Bug-fix: Periodical reporting on a cluster attribute could lead to undue delays of reports for other clusters
• Bug-fix: Startup behavior of the OnOff cluster might be incorrect due to interactions with Level Control or Color Control clusters on the same application endpoint
• Bug-fix: Brightness adjustment of the Level control cluster might be incorrect due to interactions with a Color Control cluster on the same application endpoint
• Bug-fix: Under rare circumstances, neighbor table entries might be incorrect (caused by a typo)
• Bug-fix: Under rare circumstances, out-of-sequence or truncated OTA data block could result in failed OTA download attempts