esp-matter/RELEASE_NOTES.md

5-Mar-2026

Controller API changes

• In write_command, on_error_callback, on_success_callback, and on_write_done_callback have been added to report the status of write_command.
• In subscribe_command, subscribe_failure_cb_t has been renamed to connect_failure_cb_t, and it has been added to the other interaction commands to indicate whether the CASE session is established successfully.
• StatusIB is added to attribute_report_cb_t and event_report_cb_t.

API Changes

• In subscribe_command, subscribe_done_cb_t has been renamed to subscribe_terminated_cb_t to align better with the terminology.
• In subscribe_command a new callback subscription_established_cb_t has been added to report successfully subscription commands.

4-Feb-2026

API Changes

• Removed APIs: plugin_init_callback_common(), add_bounds_callback_common() and delegate_init_callback_common().

27-Nov-2025

Feature: attribute::get_val() and attribute::set_val() APIs

• attribute::get_val()

  • API now supports getting the value of internally managed attributes of primitive data types.
  • Complex types are not supported yet, eg: (Array, Struct, List, etc.)

• attribute::set_val()

  • API now supports setting the value of internally managed attributes which are writable and of data type primitive.
  • Attributes which are not writable but managed internally are not supported yet
  • Complex types are not supported yet, eg: (Array, Struct, List, etc.)

• For unsupported attributes, the APIs will return ESP_ERR_NOT_SUPPORTED, please use the cluster-specific setter APIs.

21-Nov-2025

API Changes: Attribute Creation Function Names

The following attribute creation APIs have been renamed to remove inconsistencies and align with Matter specifications:

Descriptor Cluster

create_device_list() → create_device_type_list()

Thread Network Diagnostics Cluster

create_active_network_faults() → create_active_network_faults_list()

Ethernet Network Diagnostics Cluster

create_tx_error_count() → create_tx_err_count()

Groups Cluster

create_group_name_support() → create_name_support()

Thermostat Cluster

create_schedule_type() → create_schedule_types()

Door Lock Cluster

create_door_close_events() → create_door_closed_events()

Temperature Measurement Cluster

Removed temperature_ prefix from attribute names:

create_temperature_measured_value() → create_measured_value()
create_temperature_min_measured_value() → create_min_measured_value()
create_temperature_max_measured_value() → create_max_measured_value()

Relative Humidity Measurement Cluster

Removed relative_humidity_ prefix from attribute names:

create_relative_humidity_measured_value() → create_measured_value()
create_relative_humidity_min_measured_value() → create_min_measured_value()
create_relative_humidity_max_measured_value() → create_max_measured_value()
create_relative_humidity_tolerance() → create_tolerance()

Illuminance Measurement Cluster

Removed illuminance_ prefix from attribute names:

create_illuminance_measured_value() → create_measured_value()
create_illuminance_min_measured_value() → create_min_measured_value()
create_illuminance_max_measured_value() → create_max_measured_value()
create_illuminance_tolerance() → create_tolerance()
create_illuminance_light_sensor_type() → create_light_sensor_type()

Pressure Measurement Cluster

Removed pressure_ prefix from attribute names:

create_pressure_measured_value() → create_measured_value()
create_pressure_min_measured_value() → create_min_measured_value()
create_pressure_max_measured_value() → create_max_measured_value()
create_pressure_tolerance() → create_tolerance()
create_pressure_scaled_value() → create_scaled_value()
create_pressure_min_scaled_value() → create_min_scaled_value()
create_pressure_max_scaled_value() → create_max_scaled_value()
create_pressure_scaled_tolerance() → create_scaled_tolerance()
create_pressure_scale() → create_scale()

Flow Measurement Cluster

Removed flow_ prefix from attribute names:

create_flow_measured_value() → create_measured_value()
create_flow_min_measured_value() → create_min_measured_value()
create_flow_max_measured_value() → create_max_measured_value()
create_flow_tolerance() → create_tolerance()

Pump Configuration and Control Cluster

create_pump_power() → create_power()

Mode Select Cluster

create_mode_select_description() → create_description()

Namespace Changes

Thread Network Diagnostics Cluster

feature::packets_counts → feature::packet_counts

31-Oct-2025

API Changes: feature::add() Function

The following APIs have been updated — the config parameter has been removed, as the corresponding attributes are optional.

window_covering::feature::lift::add(cluster_t *cluster);
window_covering::feature::tilt::add(cluster_t *cluster);

21-Oct-2025

API Changes: feature::add() Function

The following APIs have been updated — the config parameter has been removed, as the corresponding attributes are internally managed and not user-configurable:

general_commissioning::feature::terms_and_conditions::add(cluster_t *cluster);
ethernet_network_diagnostics::feature::packet_counts::add(cluster_t *cluster);
ethernet_network_diagnostics::feature::error_counts::add(cluster_t *cluster);
unit_localization::feature::temperature_unit::add(cluster_t *cluster);
water_heater_management::feature::energy_management::add(cluster_t *cluster);
water_heater_management::feature::tank_percentage::add(cluster_t *cluster);

30-Sep-2025

Namespace Changes to Align with Matter Specifications

Cluster namespace changes

• ota_requestor → ota_software_update_requestor
• ota_provider → ota_software_update_provider

Device type namespace changes

• on_off_switch → on_off_light_switch
• power_source_device → power_source
• window_covering_device → window_covering
• mode_select_device → mode_select

Namespace Changes for Consistency

• on_off_plugin_unit → on_off_plug_in_unit
• dimmable_plugin_unit -> dimmable_plug_in_unit
• descriptor::feature::taglist → descriptor::feature::tag_list
• color_temperature_light::color_temperature::startup_color_temperature_mireds → color_temperature_light::color_temperature::start_up_color_temperature_mireds

Note

The following namespaces exist in both the cluster and device_type namespaces:

• window_covering
• power_source
• mode_select

To avoid ambiguity, please reference them explicitly depending on context. For example:

• Use endpoint::window_covering::create() to create the endpoint
• Use cluster::window_covering::create() to create the cluster

2-Sep-2025

API change.

Move the macros REMAP_TO_RANGE() and REMAP_TO_RANGE_INVERSE() to from the esp_matter_attribute_utils.h to common_macros.h in examples/common/utils directory.

10-June-2025

API Change. Removed the features parameter from the cluster::create() API to make it consistent across all clusters. The new API signature is:

cluster_t *create(endpoint_t *endpoint, config_t *config, uint8_t flags);

For clusters with O.a/O.a+ features conformance, the feature_flags is available at cluster level. For device types with M feature conformance of a cluster, the feature config is available at device type level. For clusters with O feature conformance, feature should be added using feature_name::add() API in the application.

3-Feb-2024

Cluster structure change.

• feature_flags are now part of cluster::config to configure the features in the application.
• moved features::config from cluster::config to cluster::config::features structure.

27-December-2024

Added matter esp factoryreset command to factory reset a Matter device. This command erases the esp-matter and connectedhomeip SDK's non-volatile storage.

15-Oct-2024

API Change

esp_err_t get_bounds(attribute_t *attribute, esp_matter_attr_bounds_t *bounds);

• Above API returns the esp_err_t and has parameter bounds.

28-Aug-2024

• Removed the configurability of the NameSupport attribute of the Groups cluster and enabled it by default. The NameSupport and feature-map attributes of the Groups cluster must be kept in sync, the connectedhomeip SDK enables the GroupName feature by default and set the NameSupport attribute to appropriate value.

08-July-2024

• Changed diagnostic cluster namespaces as per the matter specifications
  • diagnostics_network_wifi -> wifi_network_diagnostics
  • diagnostics_network_thread -> thread_network_diagnostics
  • diagnostics_network_ethernet -> ethernet_network_diagnostics

07-May-2024

• tools/mfg_tool.py is moved to https://github.com/espressif/esp-matter-tools/tree/main/mfg_tool and can be installed by running python3 -m pip install esp-matter-mfg-tool.

14-February-2024

• An optional argument, max_val_size, has been introduced to the esp_matter::attribute::create() API. This argument is utilized specifically when creating attributes of the char string and long char string data types to specify the maximum supported value size of an attribute.

29-January-2024

• Add a new parameter for esp_matter::client::connect() to set the CASESessionManager for finding or establishing the CASE sessions.

16-January-2024

• We have moved the creation of bridge devices to the application callback. Previously, bridge devices were created in the examples/common, but now creation is delegated to the application.

  Initialize the bridge with a callback.

  esp_err_t err = app_bridge_initialize(node, bridge_device_type_callback);
  

  Below is the example definition of callback creating on-off light.

  esp_err_t create_bridge_devices(esp_matter::endpoint_t *ep, uint32_t device_type_id, void *priv_data)
  {
  	esp_err_t err = ESP_OK;
  
  	switch (device_type_id) {
  	case ESP_MATTER_ON_OFF_LIGHT_DEVICE_TYPE_ID: {
  		on_off_light::config_t on_off_light_conf;
  		err = on_off_light::add(ep, &on_off_light_conf);
  		break;
      }
  	.
  	.
  	.
  	default: {
  		ESP_LOGE(TAG, "Unsupported bridged matter device type");
  		return ESP_ERR_INVALID_ARG;
  
  	}
  	return err;
  }
  
  

• Similar changes are made in bridge apps.

9-November-2023

• esp_matter_controller: Change the format of the command data field payload for cluster-invoke commands and the attribute value payload for attribute-write commands. Used unified JSON object format for these payloads. Please refer the document of Matter controller to learn how to construct them.

2-November-2023

All of the non-volatile attribute values now are stored in the namespace esp_matter_kvs with the attribute key base64-encoded of bytes (endpoint-id+cluster-id+attribute-id). For the devices that store the non-volatile attribute values in the previous namespace with previous attribute-key, the values will be moved and the previous keys will be erased.

29-August-2023

• ot_storage partition is no longer required for thread devices as the mechanism for storing data related to the Thread network has been changed in the openthread component in ESP-IDF.

14-April-2023

Changed how attribute data is stored in NVS

By default primitive data types are stored as blob and that consumes more space in NVS. Added a configuration option (CONFIG_ESP_MATTER_NVS_USE_COMPACT_ATTR_STORAGE) which uses the primitive data type specific NVS APIs to store the attribute. This saves space in NVS partition.

Newer developments shall enable option ESP_MATTER_NVS_USE_COMPACT_ATTR_STORAGE to save on NVS space. All the examples have this option enabled.

7-April-2023

• tools/mfg_tool/mfg_tool.py now uses connectedhomeip/connectedhomeip/src/setup_payload/python/generate_setup_payload.py instead of previously used compiled chip-tool binary executable which additionally depends on python-stdnum module.
• Reinstall dependencies to use mfg_tool by running the following commands -

source $IDF_PATH/export.sh
python3 -m pip install -r tools/mfg_tool/requirements.txt

15-March-2023

API Change

esp_err_t esp_matter::identification::init(uint16_t endpoint_id, uint8_t identify_type,
                                            uint8_t effect_identifier = EMBER_ZCL_IDENTIFY_EFFECT_IDENTIFIER_BLINK,
                                            uint8_t effect_variant = EMBER_ZCL_IDENTIFY_EFFECT_VARIANT_DEFAULT);

• Above API now accepts the parameters for initial identification effect_identifier and effect_variant.
• If not used, then default value will be used for initialization

typedef esp_err_t (*callback_t)(callback_type_t type, uint16_t endpoint_id, uint8_t effect_id, uint8_t effect_variant,
                                    void *priv_data);

• Added additional parameter effect_variant in identification callback.

esp_matter::start(event_callback_t callback, intptr_t callback_arg = static_cast<intptr_t>(NULL))

• This API now accepts a parameter to pass additional data to the event callback. By default, the data is set to NULL in the API.

14-June-2022

First Github release of ESP Matter

Features

- Aligns to Matter Test Event 9 and ESP-IDF v4.4.1.
- ESP Matter Data Model - Intuitive, simple and dynamic.
- Utility device types supported:
    Root Node
    OTA Requestor
    OTA Provider
    Bridged Node
- Application device types supported:
    Lighting
      On/Off Light
      Dimmable Light
      Color Temperature Light
      Extended Color Light
    Smart Plugs/Outlets
      On/Off Plug-in Unit
      Dimmable Plug-in Unit
    Switches
      On/Off Light Switch
      Dimmer Switch
      Color Dimmer Switch
    Sensors
      Contact Sensor
      Occupancy Sensor
      Temperature Sensor
    Closure
      Door Lock
    HVAC
      Thermostat
      Fan
- Mass manufacturing tool that generates manufacturing NVS partition image and onboarding codes.
- RainMaker integration.
- Zigbee to Matter and BLE Mesh to Matter Bridge.

25-Sep-2023

API Change

esp_err_t add(endpoint_t *endpoint, config_t *config)

• Above API returns the esp_err instead of endpoint.

Known Issues

- BLE memory is not freed if the device has already been commissioned on bootup.
- Host-based chip-tool shows the following error during commissioning/cluster control, but the functionality works fine:
    CHIP Error 0x00000070: Unsolicited msg with originator bit clear.