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Changelog

Anjay Lite 2.0.0 (January 29th, 2026)

BREAKING CHANGES

  • Removed support for TCP and TLS bindings in NET layer - ANJ_NET_WITH_TCP, ANJ_COAP_WITH_UDP, ANJ_COAP_WITH_TCP options were removed.
  • Removed anj_net_shutdown from NET layer.
  • Monotonic time is now the primary clock used for scheduling operations, replacing real-time clock usage across the codebase.

Features

  • NTP module for time synchronization.
  • (commercial version only) Added default OSCORE Object implementation.
  • Added support for canceling observations with CoAP RST message.
  • Re-introduced anj_core_ongoing_operation API.
  • Added ANJ_OBSERVE_OBSERVATION_CANCEL_ON_TIMEOUT option to control behavior in case of notification timeouts.
  • Introduced ANJ_LOG_MICRO option for optimizing footprint of logging with tools/micro_logs_decode.py tool to decode log messages.

Improvements

  • Switch RNG implementation from getrandom() to getentropy() for improved portability.
  • Tests structure refactored in order to increase coverage.
  • Shorter Send operation payloads due to the use of a common path when encoding messages.
  • MbedTLS integration layer sets the correct MTU value.
  • MbedTLS is now fetched and compiled only once when calling make all via root CMakeLists.txt.

Bugfixes

  • Fixed a bug in TLV decoder that incorrectly rejected request with a resource instance specified in the uri-path.
  • Fixed handling of Discover requests targeting the root path.
  • Fixed incorrect descriptions of return values in callbacks from FOTA.
  • Writes to Object Instances now ignore unknown optional Resources, per LwM2M specification.

Anjay Lite 1.0.0 (October 20th, 2025)

BREAKING CHANGES

  • Implemented new Time API with distinct clock types: anj_time_real_t, anj_time_monotonic_t, anj_time_duration_t.
  • Renamed anj_dm_res_t::operation field to anj_dm_res_t::kind.
  • Renamed anj_dm_res_operation_t type to anj_dm_res_kind_t.
  • Moved anj/log/log.h header to anj/log.h.
  • Removed anj_core_ongoing_operation API.
  • Removed anj_dm_bootstrap_cleanup API.

Bugfixes

  • Fixed broken README.md link in integrations documentation

Anjay Lite 1.0.0-beta.2 (August 27th, 2025)

BREAKING CHANGES

  • Changed error codes defined in the anj_net_api.h to positive values. Returning any positive values from the user Network API implementation, other than ANJ_NET_E*, is prohibited.
  • New mandatory anj_net_queue_mode_rx_off_t API with example per-binding implementations, including anj_udp_queue_mode_rx_off() and anj_dtls_queue_mode_rx_off() were added.
  • Removed anj_net_reuse_last_port_t with example per-binding implementations.
  • Changed anj_dm_transaction_end_t last argument.

Features

  • CoAP Downloader module for large file transfers from CoAP servers, supporting FOTA Pull scenarios.
  • Added support for Write-Composite operation.
  • Persistence module and mechanism for Security and Server objects store/restore.

Improvements

  • Added anj/init.h header to make config includes and option dependency checks more consistent.
  • Removed unnecessary usages of ANJ_CONTAINER_OF() in object implementation examples.
  • Introduce Python tools for downloading object XMLs from OMA registry - tools/lwm2m_object_registry.py and generating object stubs - tools/anjay_codegen.py
  • Implemented responses caching.
  • If no confirmable notification is sent for 24 hours, the next notification sent will be confirmable.
  • The library now follows the include pattern recommendations from Include What You Use (IWYU) version 0.24 compatible with clang 20.

Bugfixes

  • Fixed improper handling of LwM2M Server responses in Separate Response mode.
  • Updated default value in description of ANJ_COAP_MAX_OPTIONS_NUMBER option.
  • Fixed an issue with calling the observation module API during message exchange handling.
  • Corrected the timing for setting the last sent notification timestamp.
  • Fixed an issue that allowed server both bootstrap and management to freely read the Security and OSCORE objects.

Anjay Lite 1.0.0-beta.1 (June 9th, 2025)

Initial release.