2BBXW-7688Router WIFI Module

１ HLK-7688A user manual 2 1.INTRODUCTION HLK-MT7688A based on MT7688AN is a low cost and low power consumption IOT module developed by Hi-Link.The module supports Linux, OpenWRT operating system and custom development. It could be widely applied to smart devices or cloud services application with its rich interface and powerful processors. 1.1. BASIC PARAMETERS High data processing ability，MCU frequency 580MHz 150M Mbps  Support 802.11b/g/n  2 0/40 Channel bandwidth Support 802.11v SupportAP,STAandAP,STAmixed Five 10/100M ETH PORT 1 USB2.0 Host interface port Interface SPI/SD-XC/eMMC Rich peripheral interfaces，SPI,I2C,I2S,PCM,UART,JTAG,GPIO Widely used in IOT Inbuilt powerful PMU Support 16 Multiple BS SID Support multiple security methods WEP64/128, TKIP,AES, WPA, WPA2, WAPI S upport QoS，WMM，WMM-PS  The following power is for Japan. 802.11b (2412-2472MHz): 6.0mW/MHz 802.11b (2484MHz): 6.0 mW/MHz 802.11g (2412-2472MHZ):3.0mW/MHz 802.11n HT20 (2412-2472MHZ): 1.5mW/MHz 802.11n HT40 (2422-2472MHZ): 1.0mW/MHz 3 2.1. Typical application HLK-7688Atypical peripheral interfaces 2.2. Specification ItemParameter ModelHLK-7688A ChipsetMT7688AN KernelMIPS24KEc Basic frequency580MHz RAMDDR2 128MB Flash32MB TemperatureEnvironmental temperature：-20°C~55°C Humidity working：0~85%（noncondensing ） Storage： 0~85%（noncondensing） Size18mm×32.8mm×2.8mm 2.2. Specification ItemParameter ModelHLK-7688A ChipsetMT7688AN KernelMIPS24KEc Basic frequency580MHz RAMDDR2 128MB Flash32MB TemperatureEnvironmental temperature：-20°C~55°C Humidity working：0~85%（noncondensing ） Storage： 0~85%（noncondensing） Size18mm×32.8mm×2.8mm 2.2. Specification ItemParameter ModelHLK-7688A ChipsetMT7688AN KernelMIPS24KEc Basic frequency580MHz RAMDDR2 128MB Flash32MB TemperatureEnvironmental temperature：-20°C~55°C Humidity working：0~85%（noncondensing ） Storage： 0~85%（noncondensing） Size18mm×32.8mm×2.8mm 2.2. Specification ItemParameter ModelHLK-7688A ChipsetMT7688AN KernelMIPS24KEc Basic frequency580MHz RAMDDR2 128MB Flash32MB TemperatureEnvironmental temperature：-20°C~55°C Humidity working：0~85%（noncondensing ） Storage： 0~85%（noncondensing） Size18mm×32.8mm×2.8mm 4 5 3.MODULE PINS DEFINITION 3.1. DEFAULT PINS DEFINITION HLK-7688Adefault definition 6 PIN Name function 1 Function 2 Function 3Function 4 GPIONote 1 GND 2 3.3VD 3 3.3VD 4 GND 5 SPI_CS0 6 REF_CLK0 GPIO38 3333333333333333333333 3333333333333333333Tim e output 7 PERST_N GPIO36PCIe device reset 8 WDT_RST_N GPIO37 9 EPHY_LED4 JTAG_RST_NGPIO39 10 EPHY_LED3 JTAG_CLKGPIO40 11 EPHY_LED2 JTAG_TMSGPIO41 12 EPHY_LED1 JTAG_TDIGPIO42 13 EPHY_LED0 JTAG_TDOGPIO43 14 PORST_N Reset 15 UART_TXD1 PWM_CH0GPIO45 16 UART_RXD1 PWM_CH1GPIO46 17 I2S_SDI PCMDRXGPIO0 18 I2S_SDO PCMDTXGPIO1 19 I2S_WS PCMCLKGPIO2 20 I2S_CLK PCMFSGPIO3 21 GND 22 ANT 23 GND 24 I2C_SCLK GPIO4 25 I2C_SD GPIO5 26 SPI_CS1 GPIO6 27 SPI_CLK GPIO7 3.2. DEGAULT PINS DEFINITION 7 28 SPI_MISO GPIO9 29 SPI_MOSI GPIO8 30 GPIO0 GPIO11 31 UART_TXD0 GPIO12 32 UART_RXD0 GPIO13 33 WLED_N GPIO44WiFi LED 34 MDI_RP_P0 GPIO24 35 MDI_RN_P0 GPIO23 36 MDI_TP_P0 GPIO22 37 MDI_TN_P0 GPIO21 38 MDI_TP_P1 SPIS_CSPWM_CH0GPIO14 39 MDI_TN_P1 SPIS_CLKPWM_CH1GPIO15 40 MDI_RP_P1 SPIS_MISOUART_TXD2GPIO16 41 MDI_RN_P1 SPI_MOSIUART_RXD2GPIO17 42 MDI_RP_P2 eMMC_D7PWM_CH0GPIO18 43 MDI_RN_P2 eMMC_D6PWM_CH1GPIO19 44 MDI_TP_P2 UART_TXD2eMMC_D5PWM_CH2GPIO20 45 MDI_TN_P2 UART_RXD2eMMC_D4PWM_CH3GPIO21 46 MDI_TP_P3 SD_WPeMMC_WPGPIO22 47 MDI_TN_P3 SD_CDeMMC_CDGPIO23 48 MDI_RP_P3 SD_D1eMMC_D1GPIO24 49 MDI_RN_P3 SD_D0eMMC_D0GPIO25 50 MDI_RP_P4 SD_CLKeMMC_CLKGPIO26 51 MDI_RN_P4 SD_CMDeMMC_CMDGPIO28 52 MDI_TP_P4 SD_D3eMMC_D3GPIO29 53 MDI_TN_P4 SD_D2eMMC_D2GPIO27 54 USB_DP 55 USB_DM 56 GND Note： 1，All pins are Default function 1. FCC Caution: Any C hanges or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. When the module used in devices requiring additional RF exposure compliance information (e.g., MPE evaluation or SAR testing). OEM antegrators Installation Manual List of applicable FCC rules This module has been tested and found to comply with part 15.247 requirements for Modular Approval. The input voltage to the module should be nominally 3.3V DC, typical value 3.3V DC and the ambient temperature of the module should not exceed 55°C Limited module procedures N/A Trace antenna designs N/A Antenna The module of HLK-7688A has one antenna port and the antenna gain as below: 2.4G Wi-Fi: 2.89dBi, Antenna cable loss: 0.5dB The external antenna is Dipole Antenna. Label and compliance information When the module is installed in the host device, the FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily reamoved. If not, a second label must be placed on the outside of the final device that contains the following text: Contains Transmitter Module FCC ID: 2BBXW-7688, the FCC ID can be used only when all FCC ID compliance requirements are met. Information on test modes and additional testing requirements a)The modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes, it should not be necessary for the host installer to re‐test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter, perform some investigative measurements to confirm that the resulting…

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Application Company: JAKA Robotics Co., Ltd Address: 6B, No646, Jianchuan, Minhang, Shanghai, China Tel.: 18123653842 E-Mail: [email protected] Date: 2023-07-18 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, We, JAKA Robotics Co., Ltd , hereby authorize Shenzhen Accurate Technology Co., Ltd. to act as a laboratory for testing and test report generation for the following project(s): (Product Description: Router WIFI Module, FCC ID: 2BBXW-7688) For use in America, this device only support/enable 2.4G WiFi(2412-2462MHz) The other band have been shielded by the manufacturer using the software and the end user cannot activate. Sincerely, Signature: Name: Jing Zhang Title: Manager

JAKA Robotics Co., Ltd Attestation Letter Date: 07/11/2023 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: 2BBXW-7688 JAKA Robotics Co., Ltd (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, Signature Name: Jing Zhang Title: Manager Address: 6B,No646,Jianchuan,Minhang,Shanghai,China Tel.: 18123653842 E-mail: [email protected] CFR 47 §2.911(d)(5)(i) Attestation Letter

JAKA Robotics Co., Ltd Attestation Letter Date: 07/12/2023 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing F CC ID: 2BBXW-7688 JAK A Robotics Co., Ltd (“the applicant”) certifies that as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. S incerely, Signature Name: Jing Zhang Title: Manager Address: 6B,No646,Jianchuan,Minhang,Shanghai,China Tel.: 18123653842 E- mail: [email protected] CFR 47 §2.911 (d)(5)(ii) Attestation Letter

U.S. AGENT LETTER OF ATTESTATION Date: 2023-07-11 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: 2BBXW-7688 JAKA Robotics Co., Ltd (“the Applicant”) certifies that, as of the date of the filing of the application, USA MEIHUA TRADING INC. is our designated U.S. agent for service of process for the above referenced FCC ID. JAKA Robotics Co., Ltd (“the Applicant”) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. USA MEIHUA TRADING INC. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Company Name: USA MEIHUA TRADING INC Address:5379 Pine Valley Ct Boulder CO 80301 United States FRN:0033406166 Tel.: 1-312-363-9424 Email:[email protected] Signed by (printed name): Harley Quinn Signature: Applicant: JAKA Robotics Co., Ltd Address: 6B,No646,Jianchuan,Minhang,Shangh ai,China FRN: 0033970575 Tel: 18123653842 Email: 315785291@q q.com Signed by (printed name): Jing Zhang Signature:

JAKA Robotics Co., Ltd Address: 6B,No646,Jianchuan,Minhang,Shanghai,China Tel.: 18123653842 E- mail: [email protected] FCC Authorization Date: 2023-07-12 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, JAKA Robotics Co., Ltd hereby authorize Shenzhen Accurate Technology Co., Ltd. to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Shenzhen Accurate Technology Co., Ltd. on our behalf shall have the same effect as our own action. We, JAKA Robotics Co., Ltd the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature Name: Jing Zhang Title: Manager QA- FR-170-B

JAKA Robotics Co., Ltd Address: 6B,No646,Jianchuan,Minhang,Shanghai,China Tel.: 18123653842 E- mail: [email protected] FCC Confidential Authorization Date: 2023-07-12 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2BBXW-7688 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, JAKA Robotics Co., Ltd hereby requests long-term confidential treatment of information accompanying this application as outlined below: •Block Diagram •Schematics •Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature Name: Jing Zhang Title: Manager

JAKA Robotics Co., Ltd Address: 6B,No646,Jianchuan,Minhang,Shanghai,China Tel.: 18123653842 E-mail: [email protected] Modular Approval Letter Date: 2023-07-20 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Application Examiner, We, JAKA Robotics Co., Ltd is submitting this application for certification of product named as Router WIFI Module, Model Number: HLK-7688A, (FCC ID: 2BBXW-7688). It is seeking modular approval. The radio meets the requirements for modular approval as detailed in FCC 15.247. Compliance to each of the requirements is described below: 1. “The modular transmitter must have its own RF shielding.” Yes, it is fulfilled. The radio portion of the module has its own RF shielding. The shielding is installed at the factory. Please see the EUT photos. 2. “The modular transmitter must have buffered modulation/data inputs.” The modular transmitter has buffered modulation/data inputs, Buffered data inputsstage has been integrated in chip (Model: MTK7688AN). 3. “The modular transmitter must have its own power supply regulation.” Yes, it is fulfilled. The EUT has its own power supply regulation to insure compliance, please refer to the Block Diagram 4. “The modular transmitter must comply with the antenna requirements of Section 15.247” Yes. The EUT has a unique antenna port arrangement for Router WIFI Module, which was employed the antenna maximum gain is 2.89dBi. 5. “The modular transmitter must be tested in a stand-alone configuration.” Yes, it is fulfilled. The EUT was tested in a stand-alone configuration, please refer to test photos exhibit for details. 6. “The modular transmitter must be labeled with its own FCC ID number.” Yes, it is fulfilled. The module will be labeled with its own FCC ID number. Please see FCC ID label & location exhibit. 7. “The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements.” Yes, it is fulfilled. The necessary explanation to be complied with this requirement is contained in the user manual, and please refer to the User manual. 8. “The modular transmitter must comply with any applicable RF exposure requirements.” This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. If the device built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by§2.1093. Please contact me if you have additional questions. Your attention to this matter is greatly appreciated. Sincerely Yours, Signature: Name: Jing Zhang Title: Manager

Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E-RF External Photos Page 1 of 4 External Photos Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E-RF External Photos Page 2 of 4 Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E-RF External Photos Page 3 of 4 Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E-RF External Photos Page 4 of 4 ANT

Shenzhen Accurate Technology Co., Ltd. Report No.: RA230606-32070E-RF EXHIBITA- FCC ID LABEL AND LOCATION FCC ID Label Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the time purchase (Labeling requirements per 2.295)

Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E-RF Internal Photos Page 1 of 2 Internal Photos Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E-RF Internal Photos Page 2 of 2

Shenzhen Accurate Technology Co., Ltd. Report No.: RA230606-32070E-RF Version 9: 2023-01-30 Page 11 of 53 FCC-RF FCC §1.1307(b) – RF EXPOSURE Applicable Standard According to KDB 447498 D04 Interim General RF Exposure Guidance v01, clause 2.1.4–MPE-Based Exemption: An alternative to the SAR-based exemption is provided in § 1.1307(b)(3)(i)(C), for a much wider frequency range, from 300 kHz to 100 GHz, applicable for separation distances greater or equal to λ/2π, where λ is the free-space operating wavelength in meters. The MPE-based test exemption condition is in terms of ERP, defined as the product of the maximum antenna gain and the delivered maximum time-averaged power. For this case, a RF source is an RF exempt device if its ERP (watts) is no more than a frequency-dependent value, as detailed tabular form in Appendix B. These limits have been derived based on the basic specifications on Maximum Permissible Exposure (MPE) considered for the FCC rules in § 1.1310(e)(1). Table to § 1.1307(b)(3)(i)(C) - Single RF Sources Subject to Routine Environmental Evaluation f = frequency in MHz; R = minimum separation distance from the body of a nearby person (appropriate units, e.g., m); Test Result For worst case: Mode Frequency Range (MHz) Tune-up Output Power Antenna Gain Antenna Cable Loss ERP Evaluation Distance (cm) MPE-Based Exemption Limit (mW) (dBm) (mW) (dBi) (dBd) (dB) (dBm) (mW) 2.4G Wi-Fi 2412-2462 17.0 50.12 2.89 0.74 0.5 17.24 52.97 20 768 Note 1: The tune-up power was declared by the applicant. Note 2: 0dBd=2.15dBi. To maintain compliance with the FCC’s RF exposure guidelines, place the equipment at least 20cm from nearby persons. Result: Compliant.

1/6 Antenna specification Antenna band：WiFi 2.4G Antenna type：B l a c k m a l e n e e d l e Issuing date ：2021-9-17 Zhenjiang Xiangshan Electronics co., LTD Tel0755-33881455 Fax0755-33233276 Email: [email protected] 2/6 1． Product specification Antenna Name B l a c k m a l e n e e d l e Main Electrical Specifications Frequency Rang （MHz） VSWR ≤2.0 Impedance （Ω ） 50Ω Polarization Vertical Polarization Main Structure Specifications Length 109MM Color B l a c k 2．Appearance drawing 824~960MHz and 1710~2690MHz 3/6 3、Standing-wave pattern 4、Darkroom test data Frequency Efficiency Peak_Gain(dBi) 820 46.18% 0.08 840 46.28% 0.09 860 46.33% 0.18 880 49.28% 0.46 900 52.28% 0.54 920 55.20% 0.54 940 60.20% 0.56 960 60.80% 0.86 1700 48.26% 0.98 1800 50.29% 1.28 1900 52.28% 1.68 2000 59.66% 1.89 2100 64.29% 3.38 2200 66.86% 2.48 2300 71.82% 2.66 2400 72.28% 2.89 2500 72.58% 2.69 2600 71.86% 2.28 2700 70.86% 2.48 4 /6 5 /6 6 /6 5、Engineering drawing 10.0 32.0 90° 45° 9.9 7.8 67.5 109 87.8

Note: This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “★”. Shenzhen Accurate Technology Co., Ltd. is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect testresults are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. 1/F., Building A, Changyuan New Material Port, Science & Industry Park, Nanshan District, Shenzhen, Guangdong, P.R. China Tel: +86 755-26503290 Fax: +86 755-26503290 Web: www.atc-lab.com Version 9: 2023-01-30 Page 1 of 53 FCC-RF TEST REPORT Applicant Name : JAKA Robotics Co., Ltd Address : 6B,No646,Jianchuan,Minhang,Shanghai,China Report Number: RA230606-32070E-RF FCC ID: 2BBXW-7688 Test Standard (s) FCC Part 15.247 Sample Description Product: Router WIFI Module Model No.: HLK-7688A Trade Name: N/A Date Received: 2023-06-06 Date of Test: 2023-07-06 to 2023-07-19 Report Date: 2023-07-19 Test Result: Pass* * In the configuration tested, the EUT complied with the standards above. Prepared and Checked By: Approved By: Roger.Ling Candy Li EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: RA230606-32070E-RF Version 9: 2023-01-30 Page 2 of 53 FCC-RF TABLE OF CONTENTS DOCUMENT REVISION HISTORY ......................................................................................................................... 4 GENERAL INFORMATION ....................................................................................................................................... 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 5 OBJECTIVE ................................................................................................................................................................... 5 TEST METHODOLOGY .................................................................................................................................................. 5 MEASUREMENT UNCERTAINTY .................................................................................................................................... 6 SYSTEM TEST CONFIGURATION .......................................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 EUT EXERCISE SOFTWARE .......................................................................................................................................... 7 DUTY CYCLE ................................................................................................................................................................ 7 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................................. 7 SUMMARY OF TEST RESULTS ............................................................................................................................... 9 TEST EQUIPMENT LIST ......................................................................................................................................... 10 FCC §1.1307(b) – RF EXPOSURE ............................................................................................................................ 11 TEST RESULT ............................................................................................................................................................. 11 FCC §15.203 - ANTENNA REQUIREMENT ........................................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 12 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 EUT SETUP ................................................................................................................................................................ 13 EMI TEST RECEIVER SETUP ....................................................................................................................................... 13 TEST PROCEDURE ...................................................................................................................................................... 13 CALCULATION ........................................................................................................................................................... 14 TEST DATA ...........................................................................................................................................…

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Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E- RF Test Photos Page 1 of 2 Photo of Conducted Emission Measurement Shenzhen Accurate Technology Co., Ltd. Project No.: RA230606-32070E- RF Test Photos Page 2 of 2 Photo of Radiated Emission Measurement (Below 1G) Photo of Radiated Emission Measurement (Above 1G)