2A2P9-ESP-M2WiFi module

DOITING ® DoctorsofIntelligence&TechnologyCo.,LTD ESP-M1/M2 VER:V1.22018-5-18NUM：DM0013CN DoctorsofIntelligence&TechnologyCo.,LTD(www.doiting.com)Copyright@2014-2019 Features SOCfeatures  Built-inTensilicaL106ultra-lowpower consumption32-bitcpu,themainfrequency canbe80MHzand160MHz,alsosupport RTOS; Built-inTCP/IPprotocolstack; Built-in1channel10-bithighprecisionADC;  InterfacesincludeHSPI,UART,I2C,I2S,IR RemoteControl,PWM,GPIO;  20uAdeep-sleepcurrent,lessthan5uAcut- offcurrent; 2mswake-uptime;  1.0mWconsumepower(DTIM3andstandby state); Built-in1MSPIflashbyte;  Wi-Fifeatures Support802.11b/g/n/e/i  Supportthreemodes:Station,SoftAP,and SoftAP+STA; SupportWi-FiDirect(P2P);  SupporthardwareaccelerationforCCMP (CBC-MAC,computationmode),TKIP(MIC, RC4),WAPI(SMS4),WEP(RC4),CRC;  P2Pdetection,P2PGOmode/GCmodeand P2Ppowermanagement;  WPA/PA2PSKandWPS; Support802.11isecurity:pre-certification andTSN; Support802.11n(2.4GHz); 802.1h/RFC1042frameencapsulation;  Supportseamlessroam;  SupportATremoteupgradeandcloudOTA upgrade;  SupportSmartConfigfunctionforAndroid andiOSdevice. ModuleInterface  2*UART;  1*En; 1*ADC;  1*wakeuppin; 1*HSPI; 1*I2C;  1*I2S; MAX10*GPIOs; Workingtemperature:-40°C-105°C  Modulesize: 12.3*mm*15mm;(ESP-M1) 12.3*mm*20mm;(ESP-M2) Application ●Serialtransparenttransmission; ●WiFiprober; ●Smartpowerplug/SmartLEDlight; ●Meshnetworks; ●Sensornetworks; ●Wirelesslocationrecognition; ●Wirelesslocationsystembeacon; ●Industrialwirelesscontrol. ModuleType NameAntennaType ESP-M1IPEXexternalantenna ESP-M2PCBantennaonboard ModuleStructure DOITING ® DoctorsofIntelligence&TechnologyCo.Ltd(www.doiting.com)Copyright@2014-2019 UpdateRecord DateVersionUpdate 2017-3-14V1.0Initialversion 2017-3-18V1.1AddPCBdesign 2018-5-18V1.2Addsystemdesign DOITING ® DoctorsofIntelligence&TechnologyCo.Ltd(www.doiting.com)Copyright@2014-2019 TableofContents 1.Introduction....................................................................................................................................1 2.InterfaceDefinition.........................................................................................................................3 3.ShapeandSize................................................................................................................................5 4.ElectronicalCharacteristics...........................................................................................................7 5.PowerConsumption.......................................................................................................................7 6.Wi-FiRFCharacteristics...............................................................................................................8 8.MinimumUserSystem.................................................................................................................10 9.TheRecommendedPCBDesign(TakeESP-M2asanExample)...........................................10 10.PeripheralDesignRequirement................................................................................................12 DOITING ® ESP-M1/M2UserMannual DoctorsofIntelligence&Technology(www.doiting.com)Copyright@2014-2019 Page1 1.Introduction TheWiFimoduleESP-Mxismanufacturedbyusingahigh-performancechipnamedESP8285.This smallchipisencapsulatedanenhancedTensilica’sL106diamondseries32-bitkennelCPUwitha SRAM.Thus,ESP8285hasthecompletefunctionWi-Fifunction;itcanbeappliedindependently,and alsocanbeusedasaslaverworkingwithotherhostCPU.WhenESP8285isappliedasaslaver,itcan startfromtheonboardflash.Thebuilt-inhigh-speedbufferisnotonlybenefittoimprovethesystem performance,butoptimizethestoresystem.Inaddition,ESP-MxWiFimodulecanbeusedasWi-Fi adapterbySPI/SDIOorI2C/UARTinterface,whenitisappliedtootherMCUdesign. TheESP-MxWiFimodulesupportsthestandardIEEE802.11b/g/n/e/iprotocolandthecomplete TCP/IPprotocolstack.UsercanuseittoaddtheWiFifunctionfortheinstalleddevices,andalsocanbe viewedasaindependentnetworkcontroller.Anyway,ESP-Mxmoduleprovidesmanyprobabilitieswith thebestprice. Fig.1.1ESP-MxModuleStructure DOITING ® ESP-M1/M2UserMannual DoctorsofIntelligence&Technology(www.doiting.com)Copyright@2014-2019 Page2 TechnicalparametersforESP-Mxarelistedasfollows. Table1.1ESP-MxParameters TypesItemsParameters Wi-Fi Frequency2.4G~2.5G(2400M~2483.5M) Transmitpower 802.11b:+22.86dBm 802.11g:+26.99dBm 802.11n:+26.92dBm Receiversensitivity 802.11b:-91dbm(11Mbps) 802.11g:-75dbm（54Mbps） 802.11n:-72dbm（MCS7） AntennaPCBantenna/U.F.Lantenna Hardware CPUTensilicaL10632bitMCU Interface UART/SDIO/SPI/I2C/I2S/IRcontrol GPIO/ADC/PWM/SPI/I2C/I2S Workingvoltage2.5V~3.6V WorkingcurrentAveragecurrent:80mA,Peakcurrent:>200mA Workingtemperature-40°C~105°C Environmenttemperature-40°C~105°C Shape12.3mmx15mmx3mm/12.3mmx20mmx3mm Software Wi-FiworkingmodeStation/SoftAP/SoftAP+Station SecuritymodeWPA/WPA2 EncryptiontypeWEP/TKIP/AES UpdatefirmwareUARTDownload/OTA SoftwaredevelopNon-RTOS/RTOS/ArduinoIDEetc. NetworkprotocolIPv4,TCP/UDP/HTTP/FTP/MQTT Wi-FiworkingmodeStation/SoftAP/SoftAP+Station DOITING ® ESP-M1/M2UserMannual DoctorsofIntelligence&Technology(www.doiting.com)Copyright@2014-2019 Page3 2.InterfaceDefinition ESP-Mxmoduleinterfacedefinitionisshownasbelow。 Fig.2.1ESP-M1PinDefinition Fig.2.2ESP-M2PinDefinition WorkingmodeandpinfunctionisshowninTable2.1. Table2.1Workingmode ModeGPIO0LevelGPIO2Level UARTDownloadModeLowHigh FlashBootModeHighHigh DOITING ® ESP-M1/M2UserMannual DoctorsofIntelligence&Technology(www.doiting.com)Copyright@2014-2019 Page4 Table2.2PinFunctionDefinition NumPinNameTypeFunction 1ADCIA/Dpin.VoltageRange:0-1V.10bitresolution 2ENIEffective:Highlevel.Usedtoenablethemodule 3IO14I/OGPIO14;HSPI_CLK 4IO12I/OGPIO12;HSPI_MISO 5IO13I/OGPIO13;HSPI_MOSI;UART0_CTS 6 IO15 I/OGPIO15;MTDO;HSPICS;UART0_RTS;InternalPull-down 7VCCPPOWER：3.3V 8 GND PGND 9IO2I/OGPIO2;UART1_TXD; 10 IO0 I/OGPIO0;SPI_CS2; 11IO4I/OGPIO4 12 IO5 I/OGPIO5 13RXDI/OGPIO3;UARTRxd 14TXDI/OGPIO1;UARTTxd 15RSTIEffective:Lowlevel.Usedtoresetthe…

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EcoFlow Inc. version01 Single Modular Approval Request Letter Date:2021-08-24 FCC ID: 2A2P9-ESP-M2 Type of Equipment: WiFi module The following requirements according to FCC Part 15.212 are met: iRF shielding The radio portion has his own shielding (see external photos). ii Buffered modulation/data inputs, has been integrated in the chipset iii Power supply regulation, is integrated iv Antenna requirements section 15.203, 15.204 b and 15.204 c The module comes with one permanently attached antennas. The spurious emission requirements are fulfilled (see attached test report). v Stand alone test configuration Please referring to test set up configuration photo vi Labelling The module has its own label. The instruction for labelling rules for the host device has been stated in the users manual vii Compliance on specific rule or operating requirements The required FCC rules has been fulfilled and all instructions for maintaining compliance has been clearly stated in the users manual viii RF Exposure, RF exposure requirements are fulfilled for mobile configuration. The installation of the module is restricted to mobile host devices what is clearly stated in the installation instruction of the user manual. For portable applications OEM integrators need SAR evaluation and an own FCC ID. Name [Vicky] Title [R & D Engineer ] Company EcoFlow Inc.

FCCID:2A2P9-ESP-M2

LabelLocationOnEUT Label ProductName:WiFimodule ModelNo.:ESP-M2 FCCID:2A2P9-ESP-M2

FCCID:2A2P9-ESP-M2 ANT

version01 EcoFlowInc. DeclarationconcerningAntennaSpecification Itisherebydeclaredthattheproduct ModelNo.:ESP-M2 FCCID:2A2P9-ESP-M2 fulfillstherequirementinFCCtestrelatingtotheantennatype. ThedevicespecifiedaboveconfirmstotheFCCrecommendationsforinternalantennatype(s) describedbelow: WIFI: ModelNo.ofantenna: N/A Typeofantenna:PCBAntenna Gainoftheantenna:2.07dBi Frequencyrange:802.11b/g/n(HT20):2412-2462MHz Themountingoftheantennaisfixedtotheradiomoduleandnootherantennashouldbeused. Companyname: EcoFlowInc. Address:FactoryBuildingA202,FounderTechnologyIndustrialPark,NorthsideofSongbaiHighway, LongtengCommunity,ShiyanSub-district,BaoanDistrict,ShenzhenCity,Guangdong,China City:Guangdong ZIP/Postalcode:N/A Country:China Place:ChinaDate:2021-08-18 Signature:

RFEXPOSUREEVALUATION AccordingtoFCC1.1310:Thecriterialistedinthefollowingtableshallbeusedto evaluatetheenvironmentimpactofhumanexposuretoradiofrequency(RF)Radiation asspecifiedin§1.1307(b) FCCID:2A2P9-ESP-M2 EUTSpecification EUT Frequencyband(Operating) WLAN:2.412GHz~2.462GHz WLAN:5.18GHz~5.32GHz/5.50GHz~5.70GHz WLAN:5.745GHz~5825GHz Others: DevicecategoryPortable(<20cmseparation) Mobile(>20cmseparation) Others___ ExposureclassificationOccupational/Controlledexposure(S=5mW/cm2) GeneralPopulation/Uncontrolledexposure(S=1mW/cm2) AntennadiversitySingleantenna Multipleantennas Txdiversity Rxdiversity Tx/Rxdiversity Max.outputpower17.68dBm(0.0586W) Antennagain(Max)2.07dBi EvaluationappliedMPEEvaluation SAREvaluation LimitsforMaximumPermissibleExposure(MPE) Frequency Range(MHz) ElectricField Strength(V/m) MagneticField Strength(A/m) Power Density(mW/cm 2 ) Average Time (A)LimitsforOccupational/ControlExposures 300-1500----F/3006 1500-100000----56 (B)LimitsforGeneralPopulation/UncontrolExposures 300-1500----F/15006 1500-100000----130 WiFi module Friistransmissionformula:Pd=(Pout*G)\(4*pi*R2) Where Pd=PowerdensityinmW/cm 2 Pout=outputpowertoantennainMw G=gainofantennainlinearscale Pi=3.1416 R=distancebetweenobservationpointandcenteroftheradiatorincm PdthelimitofMPE,1mW/cm2.Ifweknowthemaximumgainoftheantennaand totalpowerinputtotheantenna,throughthecalculation,wewillknowthedistance wheretheMPElimitisreached. MeasurementResult Operating Mode Channel Frequency Measured Power Tuneup tolerance Max.Tune upPower Antenna Gain Powerdensity at20cm Power density Limits (mW/cm2) (MHz)(dBm)(dBm)(dBm)(dBi)(mW/cm2) 802.11b 241215.1215.12±116.122.07 0.0131 1 243714.8314.83±115.832.07 0.0123 1 246214.7114.71±115.712.07 0.0119 1 802.11g 241217.6817.68±118.682.07 0.0236 1 243716.9816.98±117.982.07 0.0201 1 246216.8016.80±117.82.07 0.0193 1 802.11n(20) 241217.1717.17±118.172.07 0.0210 1 243716.9516.95±117.952.07 0.0200 1 246216.8516.85±117.852.07 0.0195 1

Page1of37 AppendixTestData ReportNo.:18220WC10163901TestDate:2021.7.22 TestEngineer:Auditor: Temperature:23.5 °C RelativeHumidity:56% Pressure:1012hPa AppendixA:DTSBandwidth TestResult TestModeAntennaChannel DTSBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict 11BAnt1 24128.4002407.4802415.880>=0.5PASS 24378.6802432.4402441.120>=0.5PASS 24628.6802457.4002466.080>=0.5PASS 11GAnt1 241215.6802404.2002419.880>=0.5PASS 243716.0402428.8002444.840>=0.5PASS 246216.4002453.8002470.200>=0.5PASS 11N20Ant1 241216.7202403.2002419.920>=0.5PASS 243716.3602428.8402445.200>=0.5PASS 246217.0802453.1202470.200>=0.5PASS Page2of37 TestGraphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 Page3of37 11G_Ant1_2412 11G_Ant1_2437 Page4of37 11G_Ant1_2462 11N20_Ant1_2412 11N20_Ant1_2437 Page5of37 11N20_Ant1_2462 Page6of37 AppendixB:OccupiedChannelBandwidth TestResult TestModeAntennaChannel OCB[MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict 11BAnt1 241212.7672405.6162418.383---PASS 243712.6742430.5932443.267---PASS 246212.4892455.6912468.180---PASS 11GAnt1 241218.4292402.5252420.954---PASS 243717.7342427.9472445.681---PASS 246217.5312453.0202470.551---PASS 11N20Ant1 241218.5912402.5022421.093---PASS 243718.7732427.5252446.298---PASS 246218.8522452.3282471.180---PASS Page7of37 TestGraphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 Page8of37 11G_Ant1_2412 11G_Ant1_2437 Page9of37 11G_Ant1_2462 11N20_Ant1_2412 11N20_Ant1_2437 Page10of37 11N20_Ant1_2462 Page11of37 AppendixC:Maximumconductedoutputpower TestResult TestModeAntennaChannelResult[dBm]Limit[dBm]Verdict 11BAnt1 241215.12<=30PASS 243714.83<=30PASS 246214.71<=30PASS 11GAnt1 241217.68<=30PASS 243716.98<=30PASS 246216.80<=30PASS 11N20Ant1 241217.17<=30PASS 243716.95<=30PASS 246216.85<=30PASS Page12of37 AppendixD:Maximumpowerspectraldensity TestResult TestModeAntennaChannelResult[dBm/10kHz]Limit[dBm/3kHz]Verdict 11BAnt1 2412-6.65<=8PASS 2437-7.67<=8PASS 2462-6.99<=8PASS 11GAnt1 2412-8.29<=8PASS 2437-8.68<=8PASS 2462-8.72<=8PASS 11N20Ant1 2412-8.99<=8PASS 2437-9.61<=8PASS 2462-9.8<=8PASS Page13of37 TestGraphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 Page14of37 11G_Ant1_2412 11G_Ant1_2437 Page15of37 11G_Ant1_2462 11N20_Ant1_2412 11N20_Ant1_2437 Page16of37 11N20_Ant1_2462 Page17of37 AppendixE:Bandedgemeasurements TestResult TestModeAntennaChNameChannelRefLevel[dBm]Result[dBm]Limit[dBm]Verdict 11BAnt1 Low24122.01-33.61<=-17.99PASS High24622.12-41.99<=-17.88PASS 11GAnt1 Low24121.89-23.3<=-18.11PASS High24621.02-40.45<=-18.98PASS 11N20Ant1 Low24121.72-21.21<=-18.28PASS High24620.67-39.03<=-19.33PASS Page18of37 TestGraphs 11B_Ant1_Low_2412 11B_Ant1_High_2462 11G_Ant1_Low_2412 Page19of37 11G_Ant1_High_2462 11N20_Ant1_Low_2412 Page20of37 11N20_Ant1_High_2462 Page21of37 AppendixF:ConductedSpuriousEmission TestResult TestModeAntennaChannel FreqRange [Mhz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict 11BAnt1 2412 Reference2.102.10---PASS 30~10002.10-64.83<=-17.9PASS 1000~265002.10-52.43<=-17.9PASS 2437 Reference1.851.85---PASS 30~10001.85-66.09<=-18.15PASS 1000~265001.85-52.52<=-18.15PASS 2462 Reference2.252.25---PASS 30~10002.25-64.52<=-17.75PASS 1000~265002.25-53.37<=-17.75PASS 11GAnt1 2412 Reference1.471.47---PASS 30~10001.47-66.39<=-18.53PASS 1000~265001.47-52.99<=-18.53PASS 2437 Reference1.571.57---PASS 30~10001.57-65.58<=-18.43PASS 1000~265001.57-51.78<=-18.43PASS 2462 Reference0.820.82---PASS 30~10000.82-66.13<=-19.18PASS 1000~265000.82-53.1<=-19.18PASS 11N20Ant1 2412 Reference1.591.59---PASS 30~10001.59-64.83<=-18.41PASS 1000~265001.59-53.03<=-18.41PASS 2437 Reference1.621.62---PASS 30~10001.62-65.7<=-18.38PASS 1000~265001.62-52.54<=-18.38PASS 2462 Reference0.890.89---PASS 30~10000.89-64.47<=-19.11PASS 1000~265000.89-52.96<=-19.11PASS Page22of37 TestGraphs 11B_Ant1_2412_0~Reference 11B_Ant1_2412_30~1000 11B_Ant1_2412_1000~26500 Page23of37 11B_Ant1_2437_0~Reference 11B_Ant1_2437_30~1000 Page24of37 11B_Ant1_2437_1000~26500 11B_Ant1_2462_0~Reference 11B_Ant1_2462_30~1000 Page25of37 11B_Ant1_2462_1000~26500 11G_Ant1_2412_0~Reference Page26of37 11G_Ant1_2412_30~1000 11G_Ant1_2412_1000~26500 11G_Ant1_2437_0~Reference Page27of37 11G_Ant1_2437_30~1000 11G_Ant1_2437_1000~26500 Page28of37 11G_Ant1_2462_0~Reference 11G_Ant1_2462_30~1000 11G_Ant1_2462_1000~26500 Page29of37 11N20_Ant1_2412_0~Reference 11N20_Ant1_2412_30~1000 Page30of37 11N20_Ant1_2412_1000~26500 11N20_Ant1_2437_0~Reference 11N20_Ant1_2437_30~1000 Page31of37 11N20_Ant1_2437_1000~26500 11N20_Ant1_2462_0~Reference Page32of37 11N20_Ant1_2462_30~1000 11N20_Ant1_2462_1000~26500 Page33of37 AppendixG:DutyCycle TestResult TestModeAntennaChannel Transmission Duration[ms] Transmission Period[ms] Duty Cycle[%] LimitVerdict 11BAnt1 24124.194.7188.96---PASS 24374.194.7188.96---PASS 24624.194.7188.96---PASS 11GAnt1 24120.690.8086.25---PASS 24370.690.7987.34---PASS 24620.690.7987.34---PASS 11N20Ant1 24120.650.7685.53---PASS 24370.650.7685.53---PASS 24620.650.7685.53---PASS Page34of37 TestGraphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 Page35of37 11G_Ant1_2412 11G_Ant1_2437 Page36of37 11G_Ant1_2462 11N20_Ant1_2412 11N20_Ant1_2437 Page37of37 11N20_Ant1_2462 ---End---

ReportNo.:18220WC10163901FCCID:2A2P9-ESP-M2Page1of40 Code:AB-RF-05-a FCCTESTREPORT ClientName:EcoFlowInc. Address: FactoryBuildingA202,FounderTechnologyIndustrial Park,NorthsideofSongbaiHighway,Longteng Community,ShiyanSub-district,BaoanDistrict, ShenzhenCity,Guangdong,China ProductName:WiFimodule Date:Aug.13,2021 ShenzhenAnbotekComplianceLaboratoryLimited ReportNo.:18220WC10163901FCCID:2A2P9-ESP-M2Page2of40 Code:AB-RF-05-a Contents 1.GeneralInformation ............................................................................................................................................... 5 1.1.ClientInformation ....................................................................................................................................... 5 1.2.DescriptionofDevice(EUT) ..................................................................................................................... 5 1.3.AuxiliaryEquipmentUsedDuringTest ................................................................................................... 6 1.4.DescriptionofTestModes ........................................................................................................................ 6 1.5.Listofchannels ........................................................................................................................................... 7 1.6.DescriptionOfTestSetup ......................................................................................................................... 8 1.7.TestEquipmentList .................................................................................................................................... 9 1.8.MeasurementUncertainty ....................................................................................................................... 10 1.9.DescriptionofTestFacility ...................................................................................................................... 10 2.SummaryofTestResults ................................................................................................................................... 11 3.ConductedEmissionTest ................................................................................................................................... 12 3.1.TestStandardandLimit .......................................................................................................................... 12 3.2.TestSetup .................................................................................................................................................. 12 3.3.TestProcedure .......................................................................................................................................... 12 4.RadiationSpuriousEmissionandBandEdge ................................................................................................ 15 4.1.TestStandardandLimit .......................................................................................................................... 15 4.2.TestSetup .................................................................................................................................................. 15 4.3.TestProcedure .......................................................................................................................................... 16 4.4.TestData .................................................................................................................................................... 17 5.MaximumOutputPowerTest ............................................................................................................................ 26 5.1.TestStandardandLimit .......................................................................................................................... 26 5.2.TestSetup .................................................................................................................................................. 26 5.3.TestProcedure .......................................................................................................................................... 26 5.4.TestData .................................................................................................................................................... 26 6.6DBOccupyBandwidthTest ............................................................................................................................. 27 6.1.TestStandardandLimit .......................................................................................................................... 27 6.2.TestSetup .................................................................................................................................................. 27 6.3.TestProcedure .......................................................................................................................................... 27 6.4.TestData .................................................................................................................................................... 27 7.PowerSpectralDensityTest .............................................................................................................................. 28 7.1.TestStandardandLimit .......................................................................................................................... 28 7.2.TestSetup .................................................................................................................................................. 28 7.3.TestProcedure .......................................................................................................................................... 28 7.4.TestData .................................................................................................................................................... 28 8.100kHzBandwidthofFrequencyBandEdgeRequirement ........................…

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FCCID:2A2P9-ESP-M2 PhotoofPowerLineConductedEmissionTest PhotoofRadiationEmissionTest