| <?xml version="1.0"?> | 
 | <!-- | 
 | Copyright (C) Connectivity Standards Alliance (2025). All rights reserved. | 
 | The information within this document is the property of the Connectivity | 
 | Standards Alliance and its use and disclosure are restricted, except as | 
 | expressly set forth herein. | 
 |  | 
 | Connectivity Standards Alliance hereby grants you a fully-paid, non-exclusive, | 
 | nontransferable, worldwide, limited and revocable license (without the right to | 
 | sublicense), under Connectivity Standards Alliance's applicable copyright | 
 | rights, to view, download, save, reproduce and use the document solely for your | 
 | own internal purposes and in accordance with the terms of the license set forth | 
 | herein. This license does not authorize you to, and you expressly warrant that | 
 | you shall not: (a) permit others (outside your organization) to use this | 
 | document; (b) post or publish this document; (c) modify, adapt, translate, or | 
 | otherwise change this document in any manner or create any derivative work | 
 | based on this document; (d) remove or modify any notice or label on this | 
 | document, including this Copyright Notice, License and Disclaimer. The | 
 | Connectivity Standards Alliance does not grant you any license hereunder other | 
 | than as expressly stated herein. | 
 |  | 
 | Elements of this document may be subject to third party intellectual property | 
 | rights, including without limitation, patent, copyright or trademark rights, | 
 | and any such third party may or may not be a member of the Connectivity | 
 | Standards Alliance. Connectivity Standards Alliance members grant other | 
 | Connectivity Standards Alliance members certain intellectual property rights as | 
 | set forth in the Connectivity Standards Alliance IPR Policy. Connectivity | 
 | Standards Alliance members do not grant you any rights under this license. The | 
 | Connectivity Standards Alliance is not responsible for, and shall not be held | 
 | responsible in any manner for, identifying or failing to identify any or all | 
 | such third party intellectual property rights. Please visit www.csa-iot.org for | 
 | more information on how to become a member of the Connectivity Standards | 
 | Alliance. | 
 |  | 
 | This document and the information contained herein are provided on an “AS IS” | 
 | basis and the Connectivity Standards Alliance DISCLAIMS ALL WARRANTIES EXPRESS | 
 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO (A) ANY WARRANTY THAT THE USE OF THE | 
 | INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OF THIRD PARTIES (INCLUDING | 
 | WITHOUT LIMITATION ANY INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENT, COPYRIGHT | 
 | OR TRADEMARK RIGHTS); OR (B) ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS | 
 | FOR A PARTICULAR PURPOSE, TITLE OR NONINFRINGEMENT. IN NO EVENT WILL THE | 
 | CONNECTIVITY STANDARDS ALLIANCE BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF | 
 | BUSINESS, LOSS OF USE OF DATA, INTERRUPTION OF BUSINESS, OR FOR ANY OTHER | 
 | DIRECT, INDIRECT, SPECIAL OR EXEMPLARY, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL | 
 | DAMAGES OF ANY KIND, IN CONTRACT OR IN TORT, IN CONNECTION WITH THIS DOCUMENT | 
 | OR THE INFORMATION CONTAINED HEREIN, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | 
 | LOSS OR DAMAGE. | 
 |  | 
 | All company, brand and product names in this document may be trademarks that | 
 | are the sole property of their respective owners. | 
 |  | 
 | This notice and disclaimer must be included on all copies of this document. | 
 |  | 
 | Connectivity Standards Alliance | 
 | 508 Second Street, Suite 206 | 
 | Davis, CA 95616, USA | 
 |  | 
 | :xrefstyle: basic | 
 | --> | 
 | <cluster xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="types types.xsd cluster cluster.xsd" id="0x0038" name="Time Synchronization Cluster" revision="2"> | 
 |   <revisionHistory> | 
 |     <revision revision="1" summary="Initial revision"/> | 
 |     <revision revision="2" summary="Make TrustedTimeSource fabric-aware, add TSC feature, define list max sizes, change writable attributes to commands, remote port, add attribute for DNS support"/> | 
 |   </revisionHistory> | 
 |   <clusterIds> | 
 |     <clusterId id="0x0038" name="Time Synchronization"/> | 
 |   </clusterIds> | 
 |   <classification hierarchy="base" role="utility" picsCode="TIMESYNC" scope="Node"/> | 
 |   <features> | 
 |     <feature bit="0" code="TZ" name="TimeZone" summary="Server supports time zone."> | 
 |       <optionalConform/> | 
 |     </feature> | 
 |     <feature bit="1" code="NTPC" name="NTPClient" summary="Server supports an NTP or SNTP client."> | 
 |       <optionalConform/> | 
 |     </feature> | 
 |     <feature bit="2" code="NTPS" name="NTPServer" summary="Server supports an NTP server role."> | 
 |       <optionalConform/> | 
 |     </feature> | 
 |     <feature bit="3" code="TSC" name="TimeSyncClient" summary="Time synchronization client cluster is present."> | 
 |       <optionalConform/> | 
 |     </feature> | 
 |   </features> | 
 |   <dataTypes> | 
 |     <enum name="GranularityEnum"> | 
 |       <item value="0" name="NoTimeGranularity" summary="This indicates that the node is not currently synchronized with a UTC Time source and its clock is based on the Last Known Good UTC Time only."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="1" name="MinutesGranularity" summary="This indicates the node was synchronized to an upstream source in the past, but sufficient clock drift has occurred such that the clock error is now > 5 seconds."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="2" name="SecondsGranularity" summary="This indicates the node is synchronized to an upstream source using a low resolution protocol. UTC Time is accurate to ± 5 seconds."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="3" name="MillisecondsGranularity" summary="This indicates the node is synchronized to an upstream source using high resolution time-synchronization protocol such as NTP, or has built-in GNSS with some amount of jitter applying its GNSS timestamp. UTC Time is accurate to ± 50 ms."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="4" name="MicrosecondsGranularity" summary="This indicates the node is synchronized to an upstream source using a highly precise time-synchronization protocol such as PTP, or has built-in GNSS. UTC time is accurate to ± 10 μs."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |     </enum> | 
 |     <enum name="StatusCodeEnum"> | 
 |       <item value="0x02" name="TimeNotAccepted" summary="Node rejected the attempt to set the UTC time"> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |     </enum> | 
 |     <enum name="TimeSourceEnum"> | 
 |       <item value="0" name="None" summary="Node is not currently synchronized with a UTC Time source."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="1" name="Unknown" summary="Node uses an unlisted time source."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="2" name="Admin" summary="Node received time from a client using the SetUTCTime Command."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="3" name="NodeTimeCluster" summary="Synchronized time by querying the Time Synchronization cluster of another Node."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="4" name="NonMatterSNTP" summary="SNTP from a server not in the Matter network. NTS is not used."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="5" name="NonMatterNTP" summary="NTP from servers not in the Matter network. None of the servers used NTS."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="6" name="MatterSNTP" summary="SNTP from a server within the Matter network. NTS is not used."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="7" name="MatterNTP" summary="NTP from servers within the Matter network. None of the servers used NTS."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="8" name="MixedNTP" summary="NTP from multiple servers in the Matter network and external. None of the servers used NTS."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="9" name="NonMatterSNTPNTS" summary="SNTP from a server not in the Matter network. NTS is used."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="10" name="NonMatterNTPNTS" summary="NTP from servers not in the Matter network. NTS is used on at least one server."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="11" name="MatterSNTPNTS" summary="SNTP from a server within the Matter network. NTS is used."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="12" name="MatterNTPNTS" summary="NTP from a server within the Matter network. NTS is used on at least one server."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="13" name="MixedNTPNTS" summary="NTP from multiple servers in the Matter network and external. NTS is used on at least one server."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="14" name="CloudSource" summary="Time synchronization comes from a vendor cloud-based source (e.g. "Date" header in authenticated HTTPS connection)."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="15" name="PTP" summary="Time synchronization comes from PTP."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="16" name="GNSS" summary="Time synchronization comes from a GNSS source."> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |     </enum> | 
 |     <enum name="TimeZoneDatabaseEnum"> | 
 |       <item value="0" name="Full" summary="Node has a full list of the available time zones"> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="1" name="Partial" summary="Node has a partial list of the available time zones"> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |       <item value="2" name="None" summary="Node does not have a time zone database"> | 
 |         <mandatoryConform/> | 
 |       </item> | 
 |     </enum> | 
 |     <struct name="DSTOffsetStruct"> | 
 |       <field id="0" name="Offset" type="int32"> | 
 |         <mandatoryConform/> | 
 |         <constraint> | 
 |           <desc/> | 
 |         </constraint> | 
 |       </field> | 
 |       <field id="1" name="ValidStarting" type="epoch-us"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="2" name="ValidUntil" type="epoch-us"> | 
 |         <quality nullable="true"/> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </struct> | 
 |     <struct name="FabricScopedTrustedTimeSourceStruct"> | 
 |       <field id="0" name="NodeID" type="node-id"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="1" name="Endpoint" type="endpoint-no"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </struct> | 
 |     <struct name="TimeZoneStruct"> | 
 |       <field id="0" name="Offset" type="int32"> | 
 |         <mandatoryConform/> | 
 |         <constraint> | 
 |           <between> | 
 |             <from value="-43200"/> | 
 |             <to value="50400"/> | 
 |           </between> | 
 |         </constraint> | 
 |       </field> | 
 |       <field id="1" name="ValidAt" type="epoch-us"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="2" name="Name" type="string"> | 
 |         <optionalConform/> | 
 |         <constraint> | 
 |           <lengthBetween> | 
 |             <from value="0"/> | 
 |             <to value="64"/> | 
 |           </lengthBetween> | 
 |         </constraint> | 
 |       </field> | 
 |     </struct> | 
 |     <struct name="TrustedTimeSourceStruct"> | 
 |       <field id="0" name="FabricIndex" type="fabric-idx"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="1" name="NodeID" type="node-id"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="2" name="Endpoint" type="endpoint-no"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </struct> | 
 |   </dataTypes> | 
 |   <attributes> | 
 |     <attribute id="0x0000" name="UTCTime" type="epoch-us" default="null"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality changeOmitted="true" nullable="true"/> | 
 |       <mandatoryConform/> | 
 |     </attribute> | 
 |     <attribute id="0x0001" name="Granularity" type="GranularityEnum"> | 
 |       <default> | 
 |         <enum default="NoTimeGranularity"/> | 
 |       </default> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <mandatoryConform/> | 
 |       <constraint> | 
 |         <desc/> | 
 |       </constraint> | 
 |     </attribute> | 
 |     <attribute id="0x0002" name="TimeSource" type="TimeSourceEnum"> | 
 |       <default> | 
 |         <enum default="None"/> | 
 |       </default> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <optionalConform/> | 
 |       <constraint> | 
 |         <desc/> | 
 |       </constraint> | 
 |     </attribute> | 
 |     <attribute id="0x0003" name="TrustedTimeSource" type="TrustedTimeSourceStruct" default="null"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality nullable="true" persistence="nonVolatile"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TSC"/> | 
 |       </mandatoryConform> | 
 |     </attribute> | 
 |     <attribute id="0x0004" name="DefaultNTP" type="string" default="null"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality nullable="true" persistence="nonVolatile"/> | 
 |       <mandatoryConform> | 
 |         <feature name="NTPC"/> | 
 |       </mandatoryConform> | 
 |       <constraint> | 
 |         <maxLength value="128"/> | 
 |       </constraint> | 
 |     </attribute> | 
 |     <attribute id="0x0005" name="TimeZone" type="list" default="[{0,0}]"> | 
 |       <entry type="TimeZoneStruct"/> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality persistence="nonVolatile"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <constraint> | 
 |         <countBetween> | 
 |           <from value="1"/> | 
 |           <to value="2"/> | 
 |         </countBetween> | 
 |       </constraint> | 
 |     </attribute> | 
 |     <attribute id="0x0006" name="DSTOffset" type="list" default="empty"> | 
 |       <entry type="DSTOffsetStruct"/> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality persistence="nonVolatile"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |     </attribute> | 
 |     <attribute id="0x0007" name="LocalTime" type="epoch-us" default="null"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality changeOmitted="true" nullable="true"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |     </attribute> | 
 |     <attribute id="0x0008" name="TimeZoneDatabase" type="TimeZoneDatabaseEnum"> | 
 |       <default> | 
 |         <enum default="None"/> | 
 |       </default> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality persistence="fixed"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |     </attribute> | 
 |     <attribute id="0x0009" name="NTPServerAvailable" type="bool" default="false"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <mandatoryConform> | 
 |         <feature name="NTPS"/> | 
 |       </mandatoryConform> | 
 |     </attribute> | 
 |     <attribute id="0x000A" name="TimeZoneListMaxSize" type="uint8"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality persistence="fixed"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <constraint> | 
 |         <between> | 
 |           <from value="1"/> | 
 |           <to value="2"/> | 
 |         </between> | 
 |       </constraint> | 
 |     </attribute> | 
 |     <attribute id="0x000B" name="DSTOffsetListMaxSize" type="uint8"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality persistence="fixed"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <constraint> | 
 |         <min value="1"/> | 
 |       </constraint> | 
 |     </attribute> | 
 |     <attribute id="0x000C" name="SupportsDNSResolve" type="bool" default="false"> | 
 |       <access read="true" readPrivilege="view"/> | 
 |       <quality persistence="fixed"/> | 
 |       <mandatoryConform> | 
 |         <feature name="NTPC"/> | 
 |       </mandatoryConform> | 
 |     </attribute> | 
 |   </attributes> | 
 |   <commands> | 
 |     <command id="0x00" name="SetUTCTime" direction="commandToServer" response="Y"> | 
 |       <access invokePrivilege="admin"/> | 
 |       <mandatoryConform/> | 
 |       <field id="0" name="UTCTime" type="epoch-us" default="0"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="1" name="Granularity" type="GranularityEnum"> | 
 |         <default> | 
 |           <enum default="NoTimeGranularity"/> | 
 |         </default> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |       <field id="2" name="TimeSource" type="TimeSourceEnum"> | 
 |         <default> | 
 |           <enum default="None"/> | 
 |         </default> | 
 |         <optionalConform/> | 
 |       </field> | 
 |     </command> | 
 |     <command id="0x01" name="SetTrustedTimeSource" direction="commandToServer" response="Y"> | 
 |       <access invokePrivilege="admin" fabricScoped="true"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TSC"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="TrustedTimeSource" type="FabricScopedTrustedTimeSourceStruct"> | 
 |         <quality nullable="true"/> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </command> | 
 |     <command id="0x02" name="SetTimeZone" direction="commandToServer" response="SetTimeZoneResponse"> | 
 |       <access invokePrivilege="manage"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="TimeZone" type="list"> | 
 |         <entry type="TimeZoneStruct"/> | 
 |         <mandatoryConform/> | 
 |         <constraint> | 
 |           <countBetween> | 
 |             <from value="1"/> | 
 |             <to value="2"/> | 
 |           </countBetween> | 
 |         </constraint> | 
 |       </field> | 
 |     </command> | 
 |     <command id="0x03" name="SetTimeZoneResponse" direction="responseFromServer"> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="DSTOffsetRequired" type="bool" default="true"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </command> | 
 |     <command id="0x04" name="SetDSTOffset" direction="commandToServer" response="Y"> | 
 |       <access invokePrivilege="manage"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="DSTOffset" type="list"> | 
 |         <entry type="DSTOffsetStruct"/> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </command> | 
 |     <command id="0x05" name="SetDefaultNTP" direction="commandToServer" response="Y"> | 
 |       <access invokePrivilege="admin"/> | 
 |       <mandatoryConform> | 
 |         <feature name="NTPC"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="DefaultNTP" type="string"> | 
 |         <quality nullable="true"/> | 
 |         <mandatoryConform/> | 
 |         <constraint> | 
 |           <maxLength value="128"/> | 
 |         </constraint> | 
 |       </field> | 
 |     </command> | 
 |   </commands> | 
 |   <events> | 
 |     <event id="0x00" name="DSTTableEmpty" priority="info"> | 
 |       <access readPrivilege="view"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |     </event> | 
 |     <event id="0x01" name="DSTStatus" priority="info"> | 
 |       <access readPrivilege="view"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="DSTOffsetActive" type="bool"> | 
 |         <mandatoryConform/> | 
 |       </field> | 
 |     </event> | 
 |     <event id="0x02" name="TimeZoneStatus" priority="info"> | 
 |       <access readPrivilege="view"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TZ"/> | 
 |       </mandatoryConform> | 
 |       <field id="0" name="Offset" type="int32"> | 
 |         <mandatoryConform/> | 
 |         <constraint> | 
 |           <between> | 
 |             <from value="-43200"/> | 
 |             <to value="50400"/> | 
 |           </between> | 
 |         </constraint> | 
 |       </field> | 
 |       <field id="1" name="Name" type="string"> | 
 |         <optionalConform/> | 
 |       </field> | 
 |     </event> | 
 |     <event id="0x03" name="TimeFailure" priority="info"> | 
 |       <access readPrivilege="view"/> | 
 |       <mandatoryConform/> | 
 |     </event> | 
 |     <event id="0x04" name="MissingTrustedTimeSource" priority="info"> | 
 |       <access readPrivilege="view"/> | 
 |       <mandatoryConform> | 
 |         <feature name="TSC"/> | 
 |       </mandatoryConform> | 
 |     </event> | 
 |   </events> | 
 | </cluster> |