第2章-智能家居工程规划设计13-translate

OutlineDesignFunctionalmoduledivisionOutlineDesignOverviewofHardwareSelection统一规划高可用性高扩展性高安全性高可维护性合适性价比HardwarePlatformDesignPrinciplesOutlineDesignWirelessnodeprocessorselectionCC2530isasystemlevelSoCchipproducedbyTI(TI)company,suitablefor2.4GHzIEEE802.15.4,ZigBee,andRF4CEapplications.TheCC2530includesatop-notchRFtransceiverwithexcellentperformance,anindustrystandardenhanced8051MUC,programmableflashmemoryinthesystem,8KBofRAM,andmanyotherpowerfulfeatures.Ithasdifferentoperatingmodes,makingitparticularlysuitableforsystemswithultra-lowpowerrequirements.CombinedwithTI'sindustry-leadingZigBeeprotocolstack(Z-Stack),itprovidesapowerfulandcompleteZigBeesolution.OutlineDesign强大无线前端。低功耗微处理器丰富的外设接口可应用领域CC2530FeaturesOutlineDesignUsingwirelessmodulesastheMCUmaincontrolandonboardsignalindicatorlights;Power,battery,network,data,dualfunctionbuttons,onboardintegratedlithiumbatteryinterface,integratedpowermanagementchip,supportingbatterychargingmanagementandpowermeasurement;OnboardUSBserialport,Tiemulatorinterface,ARMemulatorinterface;OnboardUSBdebuggingserialport,Tiemulatorinterface,ARMemulatorinterface;IntegratetwoRJ45industrialinterfacesandprovidethemainchipP0_0~P0_7outputs,hardwareincludingIO,ADC3.3V,ADC5V,UART,RS485,tworelayfunctions,providingtwo3.3V,5V,12Vpoweroutputs.LiteBClassicWirelessNodeOutlineDesignThedatasentandreceivedbysensornodesshouldbecollectedthroughthecoordinator/aggregatornodesofthegatewayfortheentirenetwork;Thecoordinator/aggregatorinteractswiththesmartcloudgateway,connectingthesensornetworktothetelecommunicationsandmobilenetworksthroughtheserviceprogramsrunningonthesmartcloudgateway.Atthesametime,itpushesdatatothesmartcloudcenterandalsosupportspushingdatatothelocalLAN.AndroidGatewayOutlineDesignThecommonlyusedIoTcommunicationmethodsaresummarizedanddividedintofourcategories.WirelessNetworkDesignAnalysisOutlineDesignZigBee技术优势低功耗低成本低速率近距离短时延高容量高安全免执照频段ZigBeeTechnicalFeaturesOutlineDesignWirelessNetworkTopologyDesignstarnetworkContainsaCoordinatornodeandaseriesofEndDevicenodes.EachEndDevicenodecanonlycommunicatewiththeCoordinatornode,andcommunicationbetweentwoEndDevicenodesmustbeforwardedthroughtheCoordinatornode.OutlineDesignTreeTopologyCoordinator和Router节点可以包含自己的子节点EndDevicecannothaveitsownchildnodes;Nodeswiththesameparentnodearecalledsiblingnodes;Nodeswiththesamegrandfathernodearecalledcousinnodes;Communicationrulesintreetopology:Eachnodecanonlycommunicatewithitsparentandchildnodes.Ifdataneedstobesentfromonenodetoanother,theinformationwillbepassedupthetreepathtothenearestancestornodeandthendowntothetargetnode.Thedisadvantageofthistopologyapproachisthatinformationonlyhasauniqueroutingchannel.