2BB8U-WS8856Wireless Transceiver Module

WS8856 WirelessTransceiverModule DataSheet  Supportforawiderangeoffrequencyband861-930MHz  Supports1,000node-likenetworks  Supportforhighairrate,upto300kbps  SupportfortheWi-SUNFAN1.0protocolstack  Supportupto20dBmoutputpower,multi-stagepoweradjustable  Supportformulti-channelfrequencyhoppingtransmission  Supports the bidirectional communication between the repeater and the terminal to establish a mesh network  Supportformulti-hopnetworksbetweenrepeaters(relayfunction)  Supporttheserialportcommandparameterconfiguration  Antennainterfacestamphole(50 Ω impedance)  Smallsize:22mmx15mmx2.8mm Wir eles s Tra nsc eiv er WS8856DataSheet ChengduSilentSmartTechnologyCo.,Ltd 2   Documentinformation productmodelWS8856 Productoverview861-930MHzWirelessTransceiverModule typeofdocumentationDatasheet Documentnumber DocumentversionV1.32023.05.29  Documentversionupdate order number version number RevisedcontentReviseddateRevised 1V1.0Theinitialversion2023.04.03ZJX 2V1.1Increaseofcrystalvibrationparameters2023.05.09ZJX 3V1.2Modifythedescriptionofthecrystalvibration parametersandaddthehardwareversion 2023.05.23ZJX 4V1.3Correctthelimitoperatingvoltageandcorrect theemissioncurrent 2023.05.31ZJX   WS8856DataSheet ChengduSilentSmartTechnologyCo.,Ltd 3 1 Product overview .................................................................................................................................................................................... 4 1.1 Product Introduction .................................................................................................................................................................... 4 1.2 Features ........................................................................................................................................................................................ 4 1.3 Application Scenario .................................................................................................................................................................... 4 2 Pound definition ..................................................................................................................................................................................... 5 3 Hardware design ..................................................................................................................................................................................... 6 4 Electrical and other parameters ............................................................................................................................................................... 6 4.1 Limit parameters .......................................................................................................................................................................... 6 4.2 Working parameters ..................................................................................................................................................................... 7 4.3 RF performance parameters ......................................................................................................................................................... 7 4.4 Crystal vibration parameters ........................................................................................................................................................ 8 4.5 Other parameters .......................................................................................................................................................................... 8 5. Module package dimensions .................................................................................................................................................................. 9 6 Production guidance ............................................................................................................................................................................. 10 6.1 Reflow welding curve graph ...................................................................................................................................................... 10 6.2 Reflow welding temperature and time ....................................................................................................................................... 10 7 FCCWarning Statement ........................................................................................................................................................................ 11 8 Contact us ............................................................................................................................................................................................. 14 WS8856DataSheet ChengduSilentSmartTechnologyCo.,Ltd 4 1Productoverview 1.1ProductIntroduction WS8856 Is an 861-930 MHz serial port WirelessTransceivermodule independently developed by Chengdu SilentInformationTechnology,Themaximumemissionpowercanreach20dBm,ThemoduleadoptsTI'sCC1352P 7high-performanceRFchip,SupportforIEEE802.15.4g,smartobjects(6LoWPAN)forIPv6,miotic®,Wi-SUN®, proprietary systems (including TI 15.4-Stack (Sub-1GHz)), and concurrent multiple protocols via Dynamic Multi-protocolManager(DMM)drives. WS8856SerialportWi-Sunmodulecontainsboundaryrouting(borderrouter),routing(router)twomodes, mode can be through serial command set function configuration,modulehasthenetworkfunction,multiple Wi-SUN network, node replacement, network topology acquisitionand automatic routing function, remote configuration, multicast transmission function, UDP transmission function, to meet the needs of various applicat…

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Chengdu Silent Smart Technology Co., Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: Chengdu Silent Smart Technology Co., Ltd. Address: 303-7, Floor 3, Building 12, No.38, South Jinke Road, Jinniu Hi-tech Industrial Park, Chengdu, Sichuan, China Product Name: Wireless Transceiver Module FCC ID: 2BB8U-WS8856 Model(s): WS8856 2.911(d)(5)(i) Equipment Type We, [Chengdu Silent Smart Technology Co., Ltd.] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Sheng Liguo Date: Jul. 31, 2023 Title: Manager Company name: Chengdu Silent Smart Technology Co., Ltd. Signature: NOTE 1 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Chengdu Silent Smart Technology Co., Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Chengdu Silent Smart Technology Co., Ltd. Address: 303-7, Floor 3, Building 12, No.38, South Jinke Road, Jinniu Hi-tech Industrial Park, Chengdu, Sichuan, China Product Name: Wireless Transceiver Module FCC ID: 2BB8U-WS8856 Model(s): WS8856 2.911(d)(5)(ii) Applicant filing We, [Chengdu Silent Smart Technology Co., Ltd.] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 ,established pursuant to §1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Sheng Liguo Date: Jul. 31, 2023 Title: Manager Company name: Chengdu Silent Smart Technology Co., Ltd. Signature: NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Chengdu Silent Smart Technology Co., Ltd. Agent Authorization Company: Chengdu Silent Smart Technology Co., Ltd. Address: 303-7, Floor 3, Building 12, No.38, South Jinke Road, Jinniu Hi-tech Industrial Park, Chengdu, Sichuan, China Product Name: Wireless Transceiver Module Model Number(s): WS8856 Product Description: Wireless Transceiver Module We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Jul. 31, 2023 Name: Sheng Liguo Title: Manager Company: Chengdu Silent Smart Technology Co., Ltd.

Chengdu Silent Smart Technology Co., Ltd. FCC Modular Approval Request Rev 3.0 Federal Communications Commission Equipment Authorization Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Subject; Modular Transmitter Application Company name: Chengdu Silent Smart Technology Co., Ltd. FCC ID: 2BB8U-WS8856 Dear Sir/Madam, This letter includes the FCC application requirements for Modular Transmitter Approval Request for;- FCC KDB 996369 D01 ‘Module Certification Guide v02; and FCC KDB 996369 D03 OEM Manual v01 In accordance with 47CFR 15.212 Modular Transmitters and KDB 996369 D01 ‘Module Equip Auth Guide v02’. FCC ID: 2BB8U-WS8856 has been examined against the following requirements. Requirement per 15.212 and KDB 996369 D01 Explanation from Grantee (do not write yes/no, but explain why product complies/how it is achieved) 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. Yes, the modular has own shielding cover. 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. Yes, The modular transmitter have buffered modulation/data inputs. The module must contain power supply regulation on the module. Yes, The modular transmitterhave its own power supply regulation. 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 §§ 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b). Yes, The modular transmitter comply with the antenna requirements of Section 15.203 and 15.204(c). There is a fixed antenna connector. The module must demonstrate compliance in a stand-alone configuration. Yes, The module can be configured independently and meets the requirements The module must be labeled with its permanently affixed FCC ID label, or use an electronic display (see KDB Publication 784748). Yes, The FCC ID on the product: 2BB8U- WS8856 The module must comply with all specific rules applicable to the transmitter, including all the conditions provided in the integration instructions by the grantee. Yes, The module complies fully with the operating requirements of Part 15 section as demonstrated in the test report. The module must comply with RF exposure requirements Yes, The modular transmitter complies with this requirement, please refer to RF exposure report. Chengdu Silent Smart Technology Co., Ltd. FCC Modular Approval Request Rev 3.0 Integration Instructions for host product manufacturers The following items are submitted in support of a pplication for Modular Transmitter FCC ID as noted above as required by the FCC KDB 996369 D03 OEM Manual v01. These items are provided as integration instructions for host product manufacturers (e.g., OEM instruction manual) to use when integrating a module in a host product. Any requirements that are not applicable to the Module are as indicated below. Summary of requirements and Checklist. Refer to the KDB for description of the complete requirements; KDB Ref Sect Requirements of KDB 996369 D03 User Manual Page Number reference 2.2 List of applicable FCC rules P11 2.3 Summarize the specific operational use conditions P12 2.4 Single module pro cedures P12 2.5 Trace antenna designs P13 2.6 RF exposure considerations P13 2.7 Antennas P13 2.8 Label and compliance information P14 2.9 Information on test modes and additional testing requirements P14 2.10 Additional testing, Part 15 Subpart B disclaimer P14 Name: Sheng Liguo Date: Jul. 31, 2023 Title: Manager Signature of applicant:

Chengdu Silent Smart Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Jul. 31, 2023 Subject; Request for Confidentiality FCC ID: 2BB8U-WS8856 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Sheng Liguo Title: Manager

Annex A External Photos Report No.:HK2307112966-E Page 1 of 2 Auxiliary Antenna Report No.:HK2307112966-E Page 2 of 2

FCC ID LABEL: Ca. 8mm x 12mm Label Location

FCC RF Exposure EUT Description: Wireless Transceiver Module Model No.: WS8856 FCC ID: 2BB8U‐WS8856 1. Limits In accordance with KDB447498D01V06 for Simultaneous transmission MPE test exclusion applies when the sum of the MPE ratios for all simultaneous transmitting antennas incorporated in a host device, based on the calculated/estimated, numerically modeled or measured field strengths or power density, is ≤ 1.0. Frequency Power density (mW/ cm 2 ) Averaging time(minutes) 300MHz‐‐‐‐1.5GHz F/1500 30 1.5GHz‐‐‐100GHz 1.0 30 2. Test Result of RF Exposure Evaluation 915MHz: EIRP(dBm)=88.79(dBuV/m)-95.2=-6.41(dBm) Mode Max PK Output power(dBm) Tune Up Power(dBm) Max Tune Up power(mW) Antenna Gain(dBi) Antenna Gain (linear) MPE (mW/cm²) 915 -6.41 -6±1(-5) 0.32 0 1 0.00006 Note: Note: The estimation distance is 20cm Note: PK Output power= conducted power. Conducted power see the test report HK2307112966-E. When the minimum test separation distance is >20 cm, a distance of 20 cm is applied to determine RF Exposure test exclusion. The test exclusion threshold is 0.00006mW/cm² which is< 1.0mW/cm², RF Exposure testing is not required.

ShenZhen XinErSheng Technology Co.,Ltd Customer Name: Recognition Product Name : 915MHZ One-piece antenna L=70MM (3-45mm) Customer Code : Manufacturer Code : SFANT11A13531 Quantity : 5PCS produce audits authorize Sample delivery date Biao Lisen Amy 2023.06.02 Customer Recognition: recognition audits authorize Date Recognition status: ☑ New Products □ Recognition of projects Acknowledgement of items: □ Letter of acknowledgement in triplicate □ Sample 5PCS Acknowledgement of conclusions：□ Accept □ Rejected Address：3/F, Building D, N o . 96 Lingxia Road, Fenghuang Fourth Industrial Zone, Fuyong, Bao'an District, Shenzhen, China. Tel：0755-33881455 Fax: 0755-33233276 Email: [email protected] ShenZhen XinErSheng Technology Co.,Ltd Main Technical Parameters 主要技术参数 Main technical specifications 频率范围（MHz） 868-915 Frequency Range(MHZ) 868-915 中心频率 50±10 Impedance(Ω) 50±10 特性阻抗(Ω) 增益(dBi) 0 Gain (dBi) 0 反射损耗 ≤-10 ReTurnLoss(dB) ≤-10 输出电压驻波比 ≤3 VSWR ≤3 极化方式 垂直极化 Polarization Linear Vertical 连接方式 IPEX Connector Type IPEX 物理特性 Physical Properties 天线本体材料 ABS Antenna Base ABS 工作温度 -40°C-+85°C Operating Temp -40°C-+85°C 保存温度 -40°C-+85°C Storage Temp -40°C-+85°C ShenZhen XinErSheng Technology Co.,Ltd Product Drawings ShenZhen XinErSheng Technology Co.,Ltd Main Technical Parameters 1. standing wave ratio (physics) 2. return loss ShenZhen XinErSheng Technology Co.,Ltd 2D, 3D Raditation Pattern Total (E1-XZ) Total (H-XY) ShenZhen XinErSheng Technology Co.,Ltd photograph of sth.

Page 1 of 32 Report No.: HK2307112966-E FCC Test Report Test report On Behalf of Chengdu Silent Smart Technology Co., Ltd. For Wireless Transceiver Module Model No.: WS8856 FCC ID: 2BB8U-WS8856 Prepared For : Chengdu Silent Smart Technology Co., Ltd. 303-7, Floor 3, Building 12, No.38, South Jinke Road, Jinniu Hi-tech Industrial Park, Chengdu, Sichuan, China Prepared By : Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Jul. 11, 2023~Jul. 27, 2023 Date of Report: Jul. 27, 2023 Report Number: HK2307112966-E Page 2 of 32 Report No.: HK2307112966-E Test Result Certification Applicant’s name ................. : Chengdu Silent Smart Technology Co., Ltd. Address ................................. : 303-7, Floor 3, Building 12, No.38, South Jinke Road, Jinniu Hi-tech Industrial Park, Chengdu, Sichuan, China Manufacture's Name ............ : Chengdu Silent Smart Technology Co., Ltd. Address ................................. : 303-7, Floor 3, Building 12, No.38, South Jinke Road, Jinniu Hi-tech Industrial Park, Chengdu, Sichuan, China Product description Trade Mark: Silent Smart Product name ........................... : Wireless Transceiver Module Model and/or type reference : WS8856 Standards ............................. : FCC Rules and Regulations Part 15 Subpart C Section 15.249 ANSI C63.10: 2013 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................ : Date (s) of performance of tests ............. : Jul. 11, 2023~Jul. 27, 2023 Date of Issue ........................................... : Jul. 27, 2023 Test Result .............................................. : Pass Testing Engineer : (Gary Qian) Technical Manager : (Eden Hu) Authorized Signatory : (Jason Zhou) Page 3 of 32 Report No.: HK2307112966-E Table of Contents Page 1 . Test Summary 6 1.1 . Test Procedures and Results 6 1.2 . Information of the Test Laboratory 6 1.3 . Measurement Uncertainty 6 2 . General Information 7 2.1 . General Description of EUT 7 2.2. Carrier Frequency of Channels 8 2.3. Operation of EUT During Testing 9 2.4. Description of Test Setup 9 2.5. Description of Support Units 10 2.6. Measurement Instruments List 11 3 . Conducted Emissions Test 12 3.1. Conducted Power Line Emission Limit 12 3.2. Test Setup 12 3.3. Test Procedure 12 3.4. Test Result 13 4 Field Strength of Fundamental 15 4.1. Limit 15 4.2. Test Procedure 15 4.3. Test Result 16 5. Radiated Emission Test 17 5.1. Radiation Limit 17 5.2. Test Setup 17 5.3. Test Procedure 18 5.4. Test Result 18 6. Band Edge 24 6.1. Limits 24 6.2. Test Procedure 24 6.3. Test Result 25 7. Occupied Bandwidth Measurement 27 7.1. Test Setup 27 7.2. Test Procedure 27 7.3. Measurement Equipment Used 27 7.4. Test Result 27 8. Antenna Requirement 29 9. Photograph of Test 30 Page 4 of 32 Report No.: HK2307112966-E Table of Contents Page 10. Photos of the EUT 32 Page 5 of 32 Report No.: HK2307112966-E ** Modified History ** Revision Description Issued Data Remark Revision 1.0 Initial Test Report Release Jul. 27, 2023 Jason Zhou Page 6 of 32 Report No.: HK2307112966-E 1. Test Summary 1.1. Test Procedures and Results DESCRIPTION OF TEST SECTION NUMBERRESULT CONDUCTED EMISSIONS TEST 15.207 COMPLIANT RADIATED EMISSION TEST 15.249(a)/15.209 COMPLIANT BAND EDGE 15.249(d)/15.205 COMPLIANT OCCUPIED BANDWIDTH MEASUREMENT 15.215（c） COMPLIANT ANTENNA REQUIREMENT 15.203 COMPLIANT FIELD STRENGTH OF FUNDAMENTAL 15.249(a) COMPLIANT 1.2. Information of the Test Laboratory Shenzhen HUAK Testing Technology Co., Ltd. Add.: 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Testing Laboratory Authorization： A2LA Accreditation Code is 4781.01. FCC Designation Number is CN1229. Canada IC CAB identifier is CN0045. CNAS Registration Number is L9589. 1.3. Measurement Uncertainty Measurement Uncertainty Conducted Emission Expanded Uncertainty =2.71dB, k=2 Radiated emission expanded uncertainty(9kHz-30MHz) = 3.90dB, k=2 Radiated emission expanded uncertainty(30MHz-1000MHz)= 3.90dB, k=2 Radiated emission expanded uncertainty(Above 1GHz) = 4.28dB, k=2 Page 7 of 32 Report No.: HK2307112966-E 2. General Information 2.1. General Description of EUT Equipment: Wireless Transceiver Module Model Name: WS8856 Series Model: N/A Model Difference: N/A FCC ID: 2BB8U-WS8856 Antenna Type: External Antenna Antenna Gain: 0dBi Operation frequency: 902.2-927.8MHz Number of Channels: 129CH Modulation Type: GFSK Power Source: DC 1.8V~3.8V Power Rating: DC 1.8V~3.8V Page 8 of 32 Report No.: HK2307112966-E 2.2. Carrier Frequency of Channels Description of Channel: Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 1 902.2 34 908.8 67 915.4 100 922.0 2 902.4 35 909.0 68 915.6 101 922.2 3 902.6 36 909.2 69 915.8 102 922.4 4 902.8 37 909.4 70 916.0 103 922.6 5 903.0 38 909.6 71 916.2 104 922.8 6 903.2 39 909.8 72 916.4 105 923.0 7 903.4 40 910.0 73 916.6 106 923.2 8 903.6 41 910.2 74 916.8 107 923.4 9 903.8 42 910.4 75 917.0 108 923.6 10 904.0 43 910.6 76 917.2 109 923.8 11 904.2 44 910.8 77 917.4 110 924.0 12 904.4 45 911.0 78 917.6 111 924.2 13 904.6 46 911.2 79 917.8 112 924.4 14 904.8 47 911.4 80 918.0 113 924.6 15 905.0 48 911.6 81 918.2 114 924.8 16 905.2 49 911.8 82 918.4 115 925.0 17 905.4 50 912.0 83 918.6 116 925.2 18 905.6 51 912.2 84 918.8 117 925.4 19 905.8 52 912.4 85 919.0 118 925.6 20 906.0 53 912.6 86 919.2 119 925.8 21 906.2 54 912.8 87 919.4 120 926…

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Radiated Emissions Conducted Emission