2AD56HLK-B20BLE 4.2 wireless module

ShenzhenHi-LinkElectronicCo.,Ltd. HLK-B20UserManual BLE4.2wirelessmodule Contents 1.Productdescription.......................................................................................................................................1 1.1.Basicparameters................................................................................................................................1 2.ProductOverview.........................................................................................................................................2 2.1.Technicalspecifications.....................................................................................................................2 Table2-1ProductSpecifications......................................................................................................2 2.2.Hardwaredescription.........................................................................................................................2 2.3.Blockdiagram....................................................................................................................................3 2.4.Defaultpinfunction...........................................................................................................................3 3.Testboarddescription...................................................................................................................................4 3.1.Restorefactorysettings......................................................................................................................4 4.Functiondescription......................................................................................................................................5 5.Serialportworkingstateconversion.............................................................................................................5 6.Ledlightindicationmeaning........................................................................................................................6 7.Parameterconfigurationmethod...................................................................................................................6 8.SerialportATcommandconfiguration........................................................................................................6 8.1.ATinstructionformat.........................................................................................................................6 8.1.1.Ver...........................................................................................................................................7 8.1.2.Uart..........................................................................................................................................7 8.1.3.net_commit..............................................................................................................................7 8.1.4.Reconn....................................................................................................................................7 8.1.5.ble_status.................................................................................................................................8 8.1.6.ble_name.................................................................................................................................8 8.1.7.default......................................................................................................................................8 8.1.8.Reboot.....................................................................................................................................8 9.ConfigurationToolDescription....................................................................................................................9 10.Transparenttransmissionminimumsystem................................................................................................9 11.Bluetoothdatatransmission......................................................................................................................10 12.Reflowsolderingtemperaturecurve.........................................................................................................12 AppendixADocumentRevisionHistory.......................................................................................................13 1 /13 .ShenzhenHi-LinkElectronicCo.,Ltd.Manual HLK-B20 1.Productdescription HLK-B20isannewlow-consumptionBluetoothBLE4.2controlmodulemadebyHi-Link.This productisaBluetooth-compliantmodulebasedonuniversalserialinterface.Ithasbuilt-inBLE4.2 protocolstack,whichcanrealizedataconversionbetweenuserserialportandBluetoothinterface. 1.1.Basicparameters High-speedARM9EcoreMCU 2.4G/1T1R,BLE4.2 160kprogrammingspace,20KBRAM  Powersupplyvoltage0.9-3.6v Ultralowsupplyvoltage,lowpowerconsumption Built-incrystal,highstability Smallchippackage4x4  Richperipheralinterface,SPI,I2C,ADC,UART,PWM,GPIO WidelyusedintheInternetofThings High-speed10-bitmulti-channelADCwithinternalfiltering Easytoconnect,fastspeed 2 /13 .ShenzhenHi-LinkElectronicCo.,Ltd.Manual HLK-B20 2.ProductOverview 2.1.Technicalspecifications Table2-1ProductSpecifications TransferProtocolBluetoothstandard:BLE4.2 Supplyvoltage0.9-3.6V Airspeed1Mbps Numberofchannels40 FrequencyRange2400-2480MHZ Transmitpower4DB Receivingsensitivity-96dbm Receivedpower5.1ma Transmitpower4.5ma AntennatypeExternal/internalantenna Otherparameters StatusindicatorStatusindication Environmentalstandard Operatingtemperature:-40-125°C Workinghumidity:10%-90%RH(Non-condensing) Storagetemp.:-40-90°C Storagehumidity:5%-90%RH(Non-condensing) OtherperformanceBandbandwidthoptional:1MHz 2.2.Hardwaredescription HLK-B20dimensionasbelow:(L*W)=16mm*25mm Figure1HLK-B20Dimension 3 /13 .ShenzhenHi-LinkElectronicCo.,Ltd.Manual HLK-B20 2.3.Blockdiagram UART GPIO PWM I2C SPI ADC HLK-B20 3.3V16MH z RAM(20K) 1IPEX Connector Figure2 HLK-B20Modulearchitecturediagram 2.4.Defaultpinfunction No.NetworknameTypeFunctiondescripti…

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RF Exposure Requirements Product Description: BLE 4.2 wireless module Model No.: HLK-B20 FCC ID: 2AD56HLK-B20 According to the KDB 447498 D01 v06 section 4.3.1, for 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ꞏ [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where - f(GHz) is the RF channel transmit frequency in GHz - Power and distance are rounded to the nearest mW and mm before calculation17 - The result is rounded to one decimal place for comparison Calculation Result: Tx frequency range: 2402-2480MHz Min. test separation distance: 5mm Maximum Conducted Output Power: 3.807dBm Tune-Up output power: 4dBm RF channel transmit frequency: 2480MHz Result: 0.8 Limit: 3.0 The exclusion thresholds is 0.8 < 3, so the transmitter complies with the RF exposure requirements and the SAR is not required.

Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Page 1 of 37 TEST REPORT Reference No. .................... : WTX20X07045384W FCC ID ................................ : 2AD56HLK-B20 Applicant ........................... : ShenZhen HaiLingKe Electronic co.,Ltd Address ............................. : 3F Caiyue Mansion,No.24 Liuxian blvd,LongHua District, Shenzhen, Guangdong, China Product Name ................... : BLE 4.2 wireless module Test Model. ........................ : HLK-B20 Standards .......................... : FCC Part 15.247 Date of Receipt sample .... : Jul. 14, 2020 Date of Test........................ : Jul. 14, 2020 to Jul. 31, 2020 Date of Issue ..................... : Jul. 31, 2020 Test Result ......................... : Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Prepared By: Waltek Testing Group (Shenzhen) Co., Ltd. Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China Tel.: +86-755-33663308 Fax.: +86-755-33663309 Tested by: Reviewed By: Approved & Authorized By: Jack Huang / Project Engineer Lion Cai / RF Manager Silin Chen / Manager Reference No.: WTX20X07045384W Page 2 of 37 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn TABLE OF CONTENTS 1. GENERAL INFORMATION ................................................................................................................................... 4 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ............................................................................... 4 1.2 TEST STANDARDS ................................................................................................................................................... 5 1.3 TEST METHODOLOGY ............................................................................................................................................. 5 1.4 TEST FACILITY ....................................................................................................................................................... 5 1.5 EUT SETUP AND TEST MODE ................................................................................................................................. 6 1.6 MEASUREMENT UNCERTAINTY .............................................................................................................................. 6 1.7 TEST EQUIPMENT LIST AND DETAILS ..................................................................................................................... 7 2. SUMMARY OF TEST RESULTS ........................................................................................................................... 9 3. RF EXPOSURE ....................................................................................................................................................... 10 3.1 STANDARD APPLICABLE ....................................................................................................................................... 10 3.2 TEST RESULT........................................................................................................................................................ 10 4. ANTENNA REQUIREMENT ................................................................................................................................ 11 4.1 STANDARD APPLICABLE ....................................................................................................................................... 11 4.2 EVALUATION INFORMATION ................................................................................................................................ 11 5. POWER SPECTRAL DENSITY ........................................................................................................................... 12 5.1 STANDARD APPLICABLE ....................................................................................................................................... 12 5.2 TEST SETUP BLOCK DIAGRAM ............................................................................................................................. 12 5.3 TEST PROCEDURE ................................................................................................................................................. 12 5.4 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 12 6. DTS BANDWIDTH ................................................................................................................................................. 14 6.1 STANDARD APPLICABLE ....................................................................................................................................... 14 6.2 TEST SETUP BLOCK DIAGRAM ............................................................................................................................. 14 6.3 TEST PROCEDURE ................................................................................................................................................. 14 6.4 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 14 7. RF OUTPUT POWER ............................................................................................................................................ 16 7.1 STANDARD APPLICABLE ....................................................................................................................................... 16 7.2 TEST SETUP BLOCK DIAGRAM ........................................................................…

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