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zigbee协议栈有哪些性能优势

ZigBee协议栈的性能优势主要包括低功耗、低成本、低复杂度、高容量、短时延、高安全性和强抗干扰能力等。以下是ZigBee协议栈的性能优势：低功耗：ZigBee的传输速率低，发射功率仅为1mW，且采用休眠模式，因此功耗非常低，一节5号电池可以维持长达6个月到2年左右的使用时间。低成本：由于ZigBee协议简单，且免专利...

开发笔记 ·2024-11-20

Zigbee协议栈

协议栈就是将Zigbee应用中每层定义的协议都集合在一起，给用户提供API接口进行不同协议的调用，Zigbee协议栈架构分为四层，每层都有各自的主要功能。Zigbee协议栈分为四个主要层次，分别是物理层（PHY）、介质访问控制层（MAC）、网络层（NWK）和应用层（APP）。以下是每个层次的主要功能：物理层（PHY）：...

开发笔记 ·2024-07-26

ORA-31114: XDB configuration has been deleted or is corrupted

文档解释ORA-31114:XDBconfigurationhasbeendeletedoriscorruptedCause:TheXDBconfigurationresourcehasbeendeletedorcorrupted.Action:ReinstallXDB,orreinsertavalidconfigur...

IT技术学习 ·2023-07-28

ORA-25138: string initialization parameter has been made obsolete

文档解释ORA-25138:stringinitializationparameterhasbeenmadeobsoleteCause:AnobsoleteinitializationparameterhasbeenspecifiedAction:Thesystemwillcomeup,butparametersmus...

IT技术学习 ·2023-07-28

ORA-38797: Full database recovery required after a database has been flashed back

文档解释ORA-38797:FulldatabaserecoveryrequiredafteradatabasehasbeenflashedbackCause:Anattemptwasmadetorecoversomedatafilesortablespacesofadatabaseafterthedatabaseha...

IT技术学习 ·2023-07-28

ORA-27365: job has been notified to stop, but failed to do so immediately

文档解释ORA-27365:jobhasbeennotifiedtostop,butfailedtodosoimmediatelyCause:Thejobspecifiedinthestop_jobcommandcannotbestoppedimmediately(becauseitisrollingbackorblo...

IT技术学习 ·2023-07-28

ORA-24012: cannot drop QUEUE_TABLE, some queues in string have not been dropped

文档解释ORA-24012:cannotdropQUEUE_TABLE,somequeuesinstringhavenotbeendroppedCause:Aqueueexistsinthequeuetablewhichhasnotbeendropped.Allqueuesneedtobedroppedfirst.Ac...

IT技术学习 ·2023-07-26

ORA-23396: database link “string” does not exist or has not been scheduled

文档解释ORA-23396:databaselink“string”doesnotexistorhasnotbeenscheduledCause:thedatabaselinkdoesnotexistintheschemaofthereplicationpropagatororhasnotbee...

IT技术学习 ·2023-07-26

ORA-31192: Resource string has not been checked out

文档解释ORA-31192:ResourcestringhasnotbeencheckedoutCause:Eitheroneofthefollowingisthecause:–Checkinoruncheckoutisrequestedforaresourcethathasnotbeencheckedou...

IT技术学习 ·2023-07-26

ORA-16089: archive log has already been registered

文档解释ORA-16089:archiveloghasalreadybeenregisteredCause:Anattemptwasmadetoregisteranarchivelogthatalreadyhasacorrespondingthread#andsequence#entryinthestandbydata...

IT技术学习 ·2023-07-26

ORA-19619: cannot call RESTOREVALIDATE after files have been named

文档解释ORA-19619:cannotcallRESTOREVALIDATEafterfileshavebeennamedCause:RESTOREVALIDATEwascalledaftersomefileshadalreadybeenspecifiedforrestoration.Action:Youmustca...

IT技术学习 ·2023-07-26

ORA-16043: Redo apply has been canceled.

文档解释ORA-16043:Redoapplyhasbeencanceled.Cause:Redoapplywascanceledperuserrequestoroperationtimeout.Action:Morespecificmessageswillaccompanythismessage....

IT技术学习 ·2023-07-26

ORA-21702: object is not instantiated or has been de-instantiated in cache

文档解释ORA-21702:objectisnotinstantiatedorhasbeende-instantiatedincacheCause:Userattemptedtoperformaninappropriateoperationtoatransientobjectthatisnotinstantiatedi...

IT技术学习 ·2023-07-26

ORA-19965: ALTER DATABASE RECOVER STANDBY TABLESPACE has been deprecated

文档解释ORA-19965:ALTERDATABASERECOVERSTANDBYTABLESPACEhasbeendeprecatedCause:TheSTANDBYTABLESPACEclauseoftheALTERDATABASERECOVERstatement(partial_database_recovery...

IT技术学习 ·2023-07-26

ORA-16196: database has been previously opened and closed

文档解释ORA-16196:databasehasbeenpreviouslyopenedandclosedCause:Theinstancehasalreadyopenedandclosedthedatabase,whichisallowedonlyonceinitslifetime.Action:Shutdownt...

IT技术学习 ·2023-07-26