FCC ID: 2AFOS-WT8266-S2 WiFi Module

WT8266-S2WiFiModule

Extreme / Open / Small / Easy Specification Version 2.6 2020/6/1 Disclaimer and Copyright Notice Informationinthisdocument,includingURLreferences,issubjecttochangewithoutnotice. THISDOCUMENTISPROVIDEDASISWITHNOWARRANTIESWHATSOEVER,INCLUDINGANYWARRANTY OFMERCHANTABILITY,NONINFRINGEMENT,FITNESSFORANYPARTICULARPURPOSE,ORANYWARRANTY OTHERWISEARISINGOUTOFANYPROPOSAL,SPECIFICATIONORSAMPLE.Allliability,includingliabilityfor infringementofanyproprietaryrights,relatingtouseofinformationinthisdocumentisdisclaimed.No licensesexpressorimplied,byestoppelorotherwise,toanyintellectualpropertyrightsaregrantedherein. TheWiFiAllianceMemberLogoisatrademarkoftheWiFiAlliance. Alltradenames,trademarksandregisteredtrademarksmentionedinthisdocumentareproperty oftheirrespectiveowners,andareherebyacknowledged. Astheproductupgradeorotherreasons,thismanualmaychange.ShenzhenWirelessTagTechnology Co.,Ltdhasrighttomodifythecontentsofthismanualwithoutanynoticeorwarning.Thismanualisonlyas aguide,WirelessTagTechnologyCo.,LtdSparenoefforttoprovideaccurateinformationinthismanual,but theWirelessTagcan'tguaranteemanualthereisnoproblem,allstatementsinthismanual,information andsuggestionsdonotconstituteanyguaranteeofexpressorimplication. CE marking:

UsetheWT8266intheenvironmentwiththetemperaturebetween40Cand85C.Forthefollowing equipment:WT8266RED(CE0700)isincompliancewiththeessentialrequirementsandotherrelevant provisionsofDirective(RED)2014/53/EU. Hereby,WIRELESSTAGTECHNOLOGYCO.,LIMITEDdeclaresthatthisWiFimoduleisincompliancewith essentialrequirementsandotherrelevantprovisionsofDirective(RED)2014/53/EU,Acopyofthe declarationofconformitycanbefoundatwww.wirelesstag.com. Note Amendment record Version Changed by Time Reason Details V1.0 Lemme 2015.08.13 Original V2.0 Lemme 2015.10.12 Update Flash size Available RAM size Power consumption on deep sleep mode Operating Temperature Model size on top view Schematic of WT8266-S2 FCC/CE/RoHs certification document Tech support email Product picture Environment temperature V2.1 V2.2 V2.3 V2.4 Lemme 2015.10.18 Update Lemme 2015.12.29 Update CE Caution Lemme 2016.1.21 Update CE marking update Lemme 2016.1.22 Update Certification update V2.5 Wangleyu 2018.9.10 Update V2.6 Vans 2020.6.1 Update Schematic of WT8266-S2 Layout of WT8266-S2 Size description CE marking update RED CE Certification update RoHs certification update Schematic of WT8266-S2 Layout of WT8266-S2 Contents 1.Overview....................................................................................................................................................5 2.MainFeatures...........................................................................................................................................5 3.HardwareSpecifications...........................................................................................................................6 3.1SystemDiagram..................................................................................................................................6 3.2PinDescription....................................................................................................................................6 3.3ElectricalCharacteristic.......................................................................................................................9 3.3.1MaximumRatings.........................................................................................................................9 3.3.2RecommendedOperatingEnvironment......................................................................................9 3.3.3DigitalPortCharacteristics...........................................................................................................9 3.4PowerConsumption............................................................................................................................9 3.4.1OperatingPowerConsumption....................................................................................................9 3.4.2StandbyPowerConsumption.....................................................................................................10 3.5RFCharacteristics..............................................................................................................................10 3.5.1RFConfigurationandGeneralSpecificationsofWirelessLAN...................................................10 3.5.2RFTxCharacteristics..................................................................................................................11 3.5.3RFRxCharacteristics..................................................................................................................11 4.MechanicalDimensions..........................................................................................................................11 4.1ModuleSize.......................................................................................................................................11 4.2Schematics........................................................................................................................................14

................................................................................................................................................................14 5.Certification...........................................................................................................................................14 6.ProductTrial...........................................................................................................................................15 1. Overview WT8266S2WiFimoduleisalowconsumption,highperformanceWiFinetworkcontrolmodule designedbyWirelessTag.ItcanmeettheIoTapplicationrequirementsinsmartpowergrids,building automation,securityandprotection,smarthome,remotehealthcareetc. Themodule'scoreprocessorESP8266integratesanenhancedversionofTensilica'sL106Diamondseries 32bitprocessorwithsmallerpackagesizeand16bitcompactmode,mainfrequencysupport80MHzand 160MHz,supportRTOS,integratedWiFiMAC/BB/RF/PA/LNA,onboardPCBantenna. ThemodulesupportsstandardIEEE802.11b/g/nprotocol,acompleteTCP/IPprotocolstack.it can be used to hostthe application or to offload WiFi networking functions from another application processor. 2. Main Features OperatingVoltage:3.3V OperatingTemperature4085C CPUTensilicaL106 RAM 50KBAvailable Flash 16Mbit/32Mbit16Mbitdefault System 802.11b/g/n o o o o o o o o o o o o o o IntegratedTensilicaL106ultralowpower32bitmicroMCU,with16bitRSIC.TheCPUclock speedis80MHz.Itcanalsoreachamaximumvalueof160MHz. o WIFI2.4GHzsupportWPA/WPA2 o UltraSmall18.6mm*15.0mm Integrated10bithighprecisionADC IntegratedTCP/IPStack powerin802.11bmode o Supportsantennadiversity IntegratedTRswitch,balun,LNA,Poweramplifierandmatchingnetwork Integrated PLL, Regulator and power source management components, +20 dBm output o Deepsleepcurrent<20uA,Powerdownleakagecurrent<5uA Richinterfaceonprocessor:SDIO2.0,(H)SPI,UART,I2C,I2S,IRDA,PWM,GPIO STBC,1x1MIMO,2x1MIMO,AMPDU&AMSDUaggregation&0.4sguardinterval o Wakeup,buildtheconnectionandtransmitpacketsin< 2ms Standbypowerconsumption<1.0mW(DTIM3) SupportATremoteupgradesandcloudOTAupgrade SupportSTA/AP/STA+APoperationmodes FCC/CE/RoHs 3. Hardware Specifications 3.1 System Diagram 3.2Pin Description Figure1SystemDiagram WT8266S2 Figure2PhysicalMap(TopView) Figure3WT8266S2Pinout(BottomView) Table1PinDefinitionandDescription 3.3VsupplyVDD Description GPIO2;UART1_TXD GPIO15;MIDO;HSPICS;UART0_RTS GPIO13;HSPI_MOSI;UART0_CTS GPIO4 GPIO0 GND GPIO5 GND UART0_RXD;GPIO3 UART0_TXD;GPIO1 ResetModule Name VDD IO4 IO0 IO2 IO15 GND IO13 IO5 RX0 GND TX0 RST ADC EN DetectingchipVDD3P3supplyvoltageorADCpininputvoltage(not availableatthesametime) ChipEnable. High:On,chipworksproperly;Low:Off,smallcurrent IO16 GPIO16;Deepsleepwakeup,byconnectingtoRSTpin Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 IO12 IO14 GND GND GPIO12;HSPI_MISO GPIO14;HSPI_CLK GND GNDPAD 16 17 18 19 Note Table2PinMode UARTDownload Mode Mode FlashBootMode IO15 Low Low IO0 Low High IO2 High High Table3InterfaceDescription Name Pin FunctionDescription HSPI Interface IO12(MISO),IO13(MOSI),I O14(CLK),IO15(CS) PWM Interface IO12(R),IO15(G),IO13(B) IRInterface IO14(IR_T),IO5(IR_R) ADC Interface ADC UART Interface UART0:

TX0(U0TXD),RX0(U0RXD), IO15(RTS),IO13(CTS) UART1:IO2(TX0) CanconnectexternalSPIFlash,displayandMCUetc. Theofficialdemoprovides4channelPWM(usercanexpand to8channel),canbeusedtocontrollights,buzzers,relays andmotors,etc. ThefunctionalityofInfraredremotecontrolinterfacecanbe implementedviasoftwareprogramming.NECcoding, modulation,anddemodulationareusedbythisinterface.The frequencyofmodulatedcarriersignalis38KHz. ESP8266EXintegratesa10bitprecisionSARADC. ADC_INinterfaceisusedtotestthepowersupplyvoltageof VDD3P3(Pin3andPin4),aswellastheinputvoltageofTOUT

(Pin6).Itcanbeusedinsensorsapplication. DeviceswithUARTinterfacescanbeconnected DownloadU0TXD+U0RXDorGPIO2+U0RXD Communication

(UART0):U0TXD,U0RXD,MTDO(U0RTS),MTCK(U0CTS) DebugUART1_TXD(GPIO2)Canbeusedtoprintdebugging information Bydefault,UART0willoutputsomeprintedinformationwhen thedeviceispoweredonandisbootingup.Ifthisissueexerts influenceonsomespecificapplications,userscanexchange theinnerpinsofUARTwheninitializing,thatistosay, exchangeU0TXD,U0RXDwithU0RTS,U0CTS. I2CInterface IO14(SCL),IO2(SDA) Canconnecttoexternalsensoranddisplay,etc. I2SInterface Mainlyusedforaudiocapturing,processingandtransmission. I2Sinput IO12(I2SI_DATA);

IO13(I2SI_BCK);

IO14(I2SI_WS);

I2Soutput:

IO15(I2SO_BCK);

IO3(I2SO_DATA);

IO2(I2SO_WS);

Unit C C V V V V V 3.3Electrical Characteristic 3.3.1MaximumRatings Table4.MaximumRatings Ratings Condition StorageTemperature MaximumSoldering Temperature

Value 45to125 260 SupplyVoltage IPC/JEDECJSTD020

+3.0to+3.6 3.3.2RecommendedOperatingEnvironment Table5RecommendedOperatingEnvironment Working Environment Operating Temperature Name MinValue TypicalValues MaxValue Unit SupplyVoltage VDD

40 3.0 20 3.3 85 3.6 C V 3.3.3DigitalPortCharacteristics Table6DigitalPortCharacteristics Port TypicalValues MinValue MaxValue Unit Inputlowlogiclevel Inputhighlogiclevel Outputlowlogiclevel Outputhighlogiclevel VIL VIH VOL VOL 0.3 0.75vdd N 0.8VDD 0.25VDD VDD+0.3 0.1VDD N 3.4Power Consumption 3.4.1OperatingPowerConsumption Table7OperatingPowerConsumption Mode Standard SpeedRate TypicalValue Unit 11b 11g 11n 1 11 6 54 MCS7 215 197 197 145 120 56 mA mA Tx Rx Note:RXmodedatapacketlengthis1024bytes;

Allrates 3.4.2StandbyPowerConsumption Thefollowingcurrentconsumptionisbasedon3.3Vsupplyand25Cambientwith

internalregulators.ValuesaremeasuredatantennaportwithoutSAWfilter.Allthe

transmissionmeasurementsvaluesarebasedon90%dutycycle,continuoustransmission

mode.

Table8StandbyPowerConsumption Mode Status TypicalValue 15mA 0.9mA 20uA 0.5uA ModemSleep LightSleep DeepSleep Off Standby PowerSaveMode

(2.4G)

(LowPowerListen disabled) DTIMperiod CurrentCons.(mA) T1(ms) T2(ms) Tbeacon(ms) DTIM1 DTIM3 1.2 0.9 2.01 1.99 0.36 0.32 0.99 1.06 T3

(ms) 0.39 0.41

:ModemSleeprequirestheCPUtobeworking,asinPWMorI2Sapplications.Accordingto802.11 standards(likeUAPSD),itsavespowertoshutdowntheWiFiModemcircuitwhilemaintainingaWiFi connectionwithnodatatransmission.E.g.inDTIM3,tomaintainasleep300mswake3mscycletoreceive APsBeaconpackages,thecurrentisabout15mA.

:DuringLightSleep,theCPUmaybesuspendedinapplicationslikeWiFiswitch.Withoutdata transmission,theWiFiModemcircuitcanbeturnedoffandCPUsuspendedtosavepoweraccordingtothe 802.11standard(UAPSD).E.g.inDTIM3,tomaintainasleep300mswake3mscycletoreceiveAPsBeacon packages,thecurrentisabout0.9mA.

:DeepSleepdoesnotrequireWiFiconnectiontobemaintained.Forapplicationwithlongtimelags betweendatatransmission,e.g.atemperaturesensorthatchecksthetemperatureevery100s,sleep300s andwakinguptoconnecttotheAP(takingabout0.3~1s),theoverallaveragecurrentislessthan1mA. 3.5RF Characteristics 3.5.1RFConfigurationandGeneralSpecificationsofWirelessLAN Table9RFConfigurationandGeneralSpecificationsofWirelessLAN Items Country/DomainCode CenterFrequency Modulationtype 11nHT20 11b 11g 11b 11g 11b 11g/n Specifications Reserved 2.4122.472 2.4122.472 2.4122.472 1,2,5.5,11 DSSS OFDM Rate 6,9,12,18,24,36,48,54 11n1stream MCS0,1,2,3,4,5,6,7 Unit GHz GHz GHz Mbps Mbps Mbps 3.5.2RFTxCharacteristics Table10EmissionCharacteristics Mark Parameters Condition MinValue Ftx InputFrequency 2.412 Typical Value Max Value 2.484 OutputPower Unit GHz dBm dBm dBm dBm Unit GHz dBm dBm dBm dBm dBm 19.5 18.5 16 14 98 91 93 75 71 Table11RFReceivingCharacteristics Mark Parameters Condition MinValue Frx InputFrequency 2.412 Typical Value Max Value 2.484 Sensitivity Pout 11b 3.5.3RFRxCharacteristics Srf DSSS OFDM HT20 4. Mechanical Dimensions 4.1Module Size 1Mbps 11Mbps 54Mbps MCS7 1Mbps 11Mbps 6Mbps 54Mbps MCS7 Figure4ModuleSize(FrontView) Figure41ModuleSize(reverseprojectionview) Figure5ModuleSize(SideView) 3.13mm Figure6ModuleSizeshieldingcase(SideView) 4.2 Schematics 5. Certification Figure7WT8266S2Schematics Figure8REDCE0700Certification Figure9FCCCertification Figure10RoHSCertification 6. Product Trial Forumbbs.wireless-tag.com Federal Communication Commission Statement (FCC, U.S.) ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigital device,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonable protectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgenerates, usesandcanradiateradiofrequencyenergyand,ifnotinstalledandusedinaccordancewith theinstructions,maycauseharmfulinterferencetoradiocommunications.However,thereis noguaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoes causeharmfulinterferencetoradioortelevisionreception,whichcanbedeterminedby turningtheequipmentoffandon,theuserisencouragedtotrytocorrecttheinterferenceby oneofthefollowingmeasures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowing twoconditions:(1)Thisdevicemaynotcauseharmfulinterference,and(2)thisdevicemust acceptanyinterferencereceived,includinginterferencethatmaycauseundesiredoperation. FCC Caution:

Anychangesormodificationsnotexpresslyapprovedbythepartyresponsiblefor compliancecouldvoidtheuser'sauthoritytooperatethisequipment. IMPORTANT NOTES Colocationwarning:

antennaortransmitter. OEM integration instructions:

Thistransmittermustnotbecolocatedoroperatinginconjunctionwithanyother ThisdeviceisintendedonlyforOEMintegratorsunderthefollowingconditions:

Thetransmittermodulemaynotbecolocatedwithanyothertransmitterorantenna.The moduleshallbeonlyusedwiththeexternalantenna(s)thathasbeenoriginallytestedand certifiedwiththismodule. Aslongastheconditionsabovearemet,furthertransmittertestwillnotberequired. However, the OEM integrator is still responsible for testing their endproduct for any additionalcompliancerequirementsrequiredwiththismoduleinstalled(forexample,digital deviceemissions,PCperipheralrequirements,etc.). Validity of using the module certification:

Intheeventthattheseconditionscannotbemet(forexamplecertainlaptopconfigurations orcolocationwithanothertransmitter),thentheFCCauthorizationforthismodulein combinationwiththehostequipmentisnolongerconsideredvalidandtheFCCIDofthemodule cannotbeusedonthefinalproduct.Inthesecircumstances,theOEMintegratorwillbe responsibleforreevaluatingtheendproduct(includingthetransmitter)andobtaininga separateFCCauthorization. End product labeling:

Thefinalendproductmustbelabeledinavisibleareawiththefollowing:Contains TransmitterModuleFCCID:2AFOSWT8266S2. Information that must be placed in the end user manual:

TheOEMintegratorhastobeawarenottoprovideinformationtotheenduserregarding howtoinstallorremovethisRFmoduleintheuser'smanualoftheendproductwhich integratesthismodule.Theendusermanualshallincludeallrequiredregulatory information/warningasshowinthismanual. IntegrationinstructionsforhostproductmanufacturersaccordingtoKDB996369D03OEMManualv01 2.2 List of applicable FCC rules FCCPart15SubpartC15.247&15.207&15.209 2.3 Specific operational use conditions ThemoduleisaWIFImodulewithWIFI2.4Gfunction. OperationFrequency:2412~2462MHz NumberofChannel:11 Modulation:802.11bCCK;802.11g/nOFDM Type:FPCAntenna Gain:3dBiMax. Themodulecanbeusedformobileorapplicationswithamaximum3dBiantenna.Thehost manufacturerinstallingthismoduleintotheirproductmustensurethatthefinalcompositproductcomplies withtheFCCrequirementsbyatechnicalassessmentorevaluationtotheFCCrules,includingthetransmitter operaition.Thehostmanufacturerhastobeawarenottoprovideinformationtotheenduserregardinghow toinstallorremovethisRFmoduleintheuser'smanualoftheendproductwhichintegratesthismodule.The endusermanualshallincludeallrequiredregulatoryinformation/warningasshowinthismanual. 2.4 Limited module procedures Notapplicable.ThemoduleisaSinglemoduleandcomplieswiththerequirementofFCCPart15.212. 2.5 Trace antenna designs Notapplicable.Themodulehasitsownantenna,anddoesntneedahostsprintedboard microstriptraceantennaetc. 2.6 RF exposure considerations Themodulemustbeinstalledinthehostequipmentsuchthatatleast20cmismaintainedbetweenthe antennaandusers body;andifRFexposurestatementormodulelayoutischanged,thenthehostproduct manufacturerrequiredtotakeresponsibilityofthemodulethroughachangeinFCCIDornewapplication.The FCCIDofthemodulecannotbeusedonthefinalproduct.Inthesecircumstances,thehostmanufacturerwill beresponsibleforreevaluatingtheendproduct(includingthetransmitter)andobtainingaseparateFCC authorization 2.7 Antennas AntennaSpecificationareasfollows:Type:FPCAntenna Gain:3dBi Thisdeviceisintendedonlyforhostmanufacturersunderthefollowingconditions:Thetransmittermodule maynotbecolocatedwithanyothertransmitterorantenna;

Themoduleshallbeonlyusedwiththeinternalantenna(s)thathasbeenoriginallytestedandcertified withthismodule.Theantennamustbeeitherpermanentlyattachedoremployaunique antenna coupler. Aslongastheconditionsabovearemet,furthertransmittertestwillnotberequired.However,thehost manufacturerisstillresponsiblefortestingtheirendproductforanyadditionalcompliancerequirements requiredwiththismoduleinstalled(forexample,digitaldeviceemissions,PCperipheralrequirements,etc.). 2.8 Label and compliance information HostproductmanufacturersneedtoprovideaphysicalorelabelstatingContainsFCCID:2AFOS WT8266S2withtheirfinishedproduct. 2.9 Information on test modes and additional testing requirements OperationFrequency:2412~2462MHz NumberofChannel:11 Modulation:802.11bCCK;802.11g/nOFDM Hostmanufacturermustperfomtestofradiated&conductedemissionandspuriousemission,etc accordingtotheactualtestmodesforastandalonemodulartransmitterinahost,aswellasformultiple simultaneouslytransmittingmodulesorothertransmittersinahostproduct. OnlywhenallthetestresultsoftestmodescomplywithFCCrequirements,thentheendproductcanbe soldlegally. 2.10 Additional testing, Part 15 Subpart B disclaimer ThemodulartransmitterisonlyFCCauthorizedforFCCPart15SubpartC15.247&15.207&15.209and thatthehostproductmanufacturerisresponsibleforcompliancetoanyotherFCCrulesthatapplytothehost notcoveredbythemodulartransmittergrantofcertification.IfthegranteemarketstheirproductasbeingPart 15SubpartBcompliant(whenitalsocontainsunintentionalradiatordigitalcircuity),thenthegranteeshall provideanoticestatingthatthefinalhostproductstillrequiresPart15SubpartBcompliancetestingwiththe modulartransmitterinstalled. FCCSTATEMENT:

conditions:

ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwo

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received, including interference that may cause undesired operation. Warning:Changesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliance couldvoidtheuser'sauthoritytooperatetheequipment. NOTE:ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigital device,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonable protectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgeneratesuses andcanradiateradiofrequencyenergyand,ifnotinstalledandusedinaccordancewiththe instructions,maycauseharmfulinterferencetoradiocommunications.However,thereisno guaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescause harmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturningthe equipmentoffandon,theuserisencouragedtotrytocorrecttheinterferencebyoneormoreofthe followingmeasures:

Reorientorrelocatethereceivingantenna. Increasetheseparationbetweentheequipmentandreceiver. Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthe receiverisconnected. Consultthedealeroranexperiencedradio/TVtechnicianforhelp. FCCRadiationExposureStatement:

ThisequipmentcomplieswithFCCradiationexposurelimitssetforthforanuncontrolledenvironment. Thisequipmentshouldbeinstalledandoperatedwithminimumdistance20cmbetweentheradiator&your body.

WIRELESS-TAG TECHNOLOGY CO., LIMITED Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Subject: Request for Confidentiality FCC ID: 2AFOS-WT8266-S2 To Whom It May Concern, C5266091_X10_Ed.1 Date: 7/1/2020 Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules

(47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits ID Label/Location Attestation Statement External Photos Block Diagram Schematics Test Report Test Setup Photos Users Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) SDR Software / Security Info Long-Term Confidentiality Short-Term Confidentiality No No No No No No No No No No No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Name: Louie Wang 7/1/2020 Sincerely, Signature:

Title: Manager 1/1

Letter of Authorization WIRELESS-TAG TECHNOLOGY CO., LIMITED C5266091_X8_Ed.1 Company: WIRELESS-TAG TECHNOLOGY CO., LIMITED Address: Room 115-118, Building A, ChengshishanhaiCenter, No.11, Zhongxing Road, Bantian Sub-district, Longgang District, Shenzhen, PRC Product Name: WiFi Module Model Number: WT8266-S2 FCC Identifier: 2AFOS-WT8266-S2 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Louie Wang Date: 7/1/2020 Title: Manager Signature of applicant:

1/1

C5266091_X9_Ed.1 WIRELESS-TAG TECHNOLOGY CO., LIMITED Modular Transmitter Approval Request Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Company name: WIRELESS-TAG TECHNOLOGY CO., LIMITED FCC ID: 2AFOS-WT8266-S2 Gentlemen, In accordance with 47CFR 15.212 Modular Transmitters and KDB 996369 D01 Module Certification Guide v01r04. FCC ID 2AFOS-WT8266-S2 has been examined against the following requirements. Requirement per 15.212 and KDB 996369 D01 Modular Certification Guide v01r04 The radio elements must have the radio frequency circuitry shielded. Physical components and tuning capacitor(s) may be located external to the shield, but must be on the module assembly The module must have buffered modulation/data inputs to ensure that the device will comply with Part 15 requirements with any type of input signal The module must contain power supply regulation on the module The module must contain a permanently attached antenna, or contain a unique antenna connector, and be marketed and operated only with specific antenna(s), per Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b) The module must demonstrate compliance in a stand-

alone configuration The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements) The module must comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee The module must comply with RF exposure requirements Explanation from Grantee

(do not write yes/no, but explain why product complies/how it is achieved) Yes, The module has its own RF shield Yes, The module has data transmission function and supports 2.4GWiFi function. Module with power regulation and support for DC 3.3V input The module meets requirements. the antenna The module has been tested in a standalone configuration, see report for details The module has its own FCC ID number. See the label for details. The module meets any specific rules or operational requirements applicable to the transmitter The module complies with any applicable RF exposure requirements, as detailed in the instructions. Name: Louie Wang Date: 2020-07-01 Title: Manager Signature of applicant 1/1