FCC ID: 2A3SYMBL02 Module

PAI-053 Module Spec Version20220120 Contents 1 Overview 1.1 Features 1.2 Applications 1.3 Change history 2 Module interfaces 2.1 Dimensions and package 2.2 Pin definition 3 Electrical parameters 3.1 Absolute electrical parameters 3.2 Working conditions 3.3 RF power consumption 3.4 Operating current 4 RF parameters 4.1 Basic RF features 4.2 Wi-Fi transmission performance 4.3 Wi-Fi receiving performance 4.4 Bluetooth transmission performance 4.5 Bluetooth receiving performance 5 Antenna 5.1 Antenna type 5.1 Antenna interference reduction 6 Packaging information and production instructions 6.1 Mechanical dimensions 6.2 Production instructions 6.3 Recommended oven temperature curve and temperature 6.4 Storage conditions 7 MOQ and packaging information PAI-053 is a low-power embedded Wi-Fi module that POWER7 has developed. It consists of a highly integrated RF chip (BL2028N), a few peripherals, an embedded Wi-Fi network protocol stack, and rich library functions. 1 Overview PAI-053 not only supports the AP and STA dual-network-connection manner but sup-ports the Bluetooth LE network connection manner. It has a 32-bit MCU with a running speed of up to 120 MHz, 2Mbyte flash, and 256-KB RAM, so as to support the multi-cloud connection. The three 32-bit PWM output makes the chip very Embedded low-power 32-bit CPU, which can also function as an application processor suitable for high-quality IOT control. 1.1 Features The clock rate: 120 MHz Operating voltage: 3.0V to 3.6V Wi-Fi connectivity 802.11 b/g/n Channels 1-11@2.4GHz Support WEP,WPA/WPA2,WPA/WPA2 PSK (AES) security modes Up to + 16 dBm output power in 802.11b mode Support STA/AP/STA+AP working mode Support SmartConfig and AP network configuration manners for Android and iOS devices Operating temperature-30 to 75 Bluetooth LE connectivity 6 dBm transmit power in bluetooth mode Complete bluetooth coexistence interface 1.2 Applications Intelligent building Smart household and home appliances Smart socket and light Industrial wireless control 1.3Change history Update date Updated content 20220114 This is the first release 20220119 Updated transmit power limit Version after update V1.0 V1.1 2 Module interfaces 2.1 Dimensions and package

(H)(plastic+PCBA) The PAI-051 dimensions are270.35mm (W)380.35mm (L) 4.50.15mm 2.2 Pin definition Pin number Symbol IO type 1 2 TX1 RX1 I/O I/O Function UART1_TX UART1_RX 3 4 5 6 7 GND VCC5V CEN TX2 RX2 P P I I/O I/O 3 3 Electrical parameters Ground pin Power supply pin RST PIN UART2_TX UART2_RX 3.1 Absolute electrical parameters Parameter Description Minimum value Maximum TS Storage

-40 value 85 Unit m t e p e r a t u r v o l t a g e e

-0.3 VCC Power supply 6 V 3.2 Normal working conditions Parameter Description Minimum Typical Maximum Unit TA VCC VOL VOH Imax Working status Transmit Transmit Receive Receive value value

-30 4.5 VSS Operating temperature Power supply voltage I/O low level output I/O high level output I/O drive current 5 3.3 6 value 75 5.5 VSS+0.3 V V V 20 mA 3.3 RF power consumption conditions MIN Typ Ma x Unit 135 120 35 40 30 10 5 1 mA mA mA mA uA uA uA uA 18dBm, 802.11b 11 Mbps 15 dBm, 802.11g 54 Mbps

-10 dBm Input802.11b 11 Mbps

-10 dBm Input802.11g 54 Mbps Normal standby current The MCU stops running and the Modem is powered off. Procedure MCU stops and enters low voltage Low voltage standby current Deep sleep current All main logic is powered off, only AON counter is active Shut off the current CEN=0 Note: All measurements are made at room temperature and 5V voltage 4 RF parameters 4.1 Basic RF features Parameter Description Working frequency Wi-Fi standard 2.412~2.462GHz IEEE 802.11b/g/n(1-11 Channel) Data transmission rate 11b:1,2,5.5,11(Mbps) 364856(Mbps) 11n:HT20 MCS0~MCS7 11g69121824 Antenna type External antenna 4.2 Wi-Fi transmission performance MIN TYP MAX Parameter 802.11B 1M 802.11B 5.5M 802.11B 11M 802.11G 6M 802.11G 24M 802.11G 54M 802.11N MCS0 802.11N MCS4 802.11N MCS7 PER5%@802.11B 11M PER5%802.11G 54M PER5%802.11N MCS7 LE_Receiver_Sensitivity PER5%@802.11B 11M PER5%802.11G 54M PER5%802.11N MCS7 LE_Receiver_Sensitivity EVM@11Mbps,802.11b EVM@54Mbps,802.11g EVM@HT20,MCS7,802.11n The frequency error

-15 4.3 Wi-Fi receiving performance

-19

-27

-29 15 Parameter MIN TYP MAX 4.3 Wi-Fi receiving performance Parameter MIN TYP MAX 18 18 18 15 15 15 14 14 14

-21

-30

-31

-85

-73

-69

-92

-85

-73

-69

-92 Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dB dB dB ppm Unit dBm dBm dBm dBm Unit dBm dBm dBm dBm 4.4 Bluetooth transmission performance MIN 2402 TYP 1 Parameter Working frequency Air rate error Frequency

-150 MAX 2480 150 Unit MHz Mbps KHz 4.5 Bluetooth receiving performance Parameter RX sensitivity Maximum RF signal input Inter-modulation Co-channel suppression ratio 5 Antenna 5.1 Antenna type MIN

-10 TYP

-96 10 PAI-053 Design for external antenna parameters as follows MAX

-23 Parameter Frequency Impedance VSWR Gain Efficiency MIN 2400 TYP 50 MAX 2500 2.0 2.50.5dBi 60%-70%

Unit dBm dBm dBm db Unit MHz 5.2 Antenna interference reduction To ensure optimal Wi-Fi performance, it is recommended that the antenna be at least 15 mm away from other metal parts. To prevent an adverse impact on the antenna radiation performance, avoid copper or traces within the antenna area. 6 Packaging information and production instructions 6.1 Mechanical dimensions 6.2 Production guide 1.It is recommended to use wave soldering equipment for welding of the outgoing direct insert modules, and only use manual welding when wave welding equipment cannot be used for welding. After unpacking, welding is recommended to be completed within 24 hours, otherwise, it should be placed in a drying cabinet with humidity less than 10%RH, or vacuum packaging should be conducted again and the exposure time should be recorded. The total exposure time should not exceed 168 h. 2.Equipment and materials required for welding Wave soldering equipment Wave soldering Thermostat soldering Tin strip, tin wire, Furnace temperature fixture iron flux tester baking Instruments or equipment needed for Cabinet type baking box Anti-static high temperature tray Esd gloves and high temperature gloves recommendations 6.3 Recommended furnace temperature curves and temperature 6.4 Storage conditions Moisture-proof bag vacuum packaging stored in the temperature < 40 C, humidity <

90%RH environment. The shelf life of dry-packed products is 12 months from the date of sealing of the package. Humidity indicator card in sealed package:

7 Module and packaging information 1Modular packaging Product model Each Shipping packing Number of disks Number of Box method stored in each packing plates numberpcs PAI-053 860 Blister tray disk 40 per carton 20 8 List of applicable FCC rules FCC Part 15.247 8.1 RF exposure considerations This equipment complies with the FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and any part of your body. 8.2 Label and compliance information FCC ID label on the final system must be labeled with Contains FCC ID:

2A3SYMBL02 or Contains transmitter module FCC ID: 2A3SYMBL02. 8.3 Information on test modes and additional testing requirements Contact Hesung Innovation Limited will provide stand-alone modular transmitter test mode. Additional testing and certification may be necessary when multiple modules are used in a host. 8.4 Additional testing, Part 15 Subpart B disclaimer To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring compliance with the module(s) installed and fully operational. For example, if a host was previously authorized as an unintentional radiator under the Suppliers Declaration of Conformity procedure without a transmitter certified module and a module is added, the host manufacturer is responsible for ensuring that the after the module is installed and operational the host continues to be compliant with the Part 15B unintentional radiator requirements. Since this may depend on the details of how the module is integrated with the host, Hesung Innovation Limited shall provide guidance to the host manufacturer for compliance with the Part 15B requirements. FCC Warning 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. NOTE 1: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. Note 1: This module certified that complies with RF exposure requirement under mobile or fixed condition, this module is to be installed only in mobile or fixed applications. A mobile device is defined as a transmitting device designed to be used in other than fixed locations and to generally be used in such a way that a separation distance of at least 20 centimeters is normally maintained between the transmitter's radiating structure(s) and the body of the user or nearby persons. Transmitting devices designed to be used by consumers or workers that can be easily re-located, such as wireless devices associated with a personal computer, are considered to be mobile devices if they meet the 20 centimeter separation requirement. A fixed device is defined as a device is physically secured at one location and is not able to be easily moved to another location. Note 2: Any modifications made to the module will void the Grant of Certification, this module is limited to OEM installation only and must not be sold to end-users, end-user has no manual instructions to remove or install the device, only software or operating procedure shall be placed in the end-user operating manual of final products. Note 3: The module may be operated only with the antenna with which it is authorized. Any antenna that is of the same type and of equal or less directional gain as an antenna that is authorized with the intentional radiator may be marketed with, and used with, that intentional radiator. Note 4: For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band by supplied firmware programming tool. OEM shall not supply any tool or info to the end-user regarding to Regulatory Domain change.

Reference No.: WTX22X01012786W Page 1 of 6 ANNEX EXHIBIT 1 - PRODUCT LABELING Proposed FCC ID Label Format Specifications: The label shall be securely affixed to a permanently attached part of the device, in a location where it is visible or easily accessible to the user, and shall not be readily detachable. The label shall be sufficiently durable to remain fully legible and intact on the device in all normal conditions of use throughout the devices expected lifetime. Proposed Label Location on EUT FCC ID Label Location Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn

Reference No.: WTX22X01012786R1W Page 1 of 7 ANNEX EXHIBIT 1 - PRODUCT LABELING Proposed FCC ID Label Format Specifications: The label shall be securely affixed to a permanently attached part of the device, in a location where it is visible or easily accessible to the user, and shall not be readily detachable. The label shall be sufficiently durable to remain fully legible and intact on the device in all normal conditions of use throughout the devices expected lifetime. Proposed Label Location on EUT FCC ID Label Location Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn

Hesung Innovation Limited Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong 999077, Date: 2023-08-16 FEDERAL COMMUNICATIONS COMMISSION AUTHORIZATION AND EVALUATION DIVISION 7435 OAKLAND MILLS ROAD COLUMBIA, MD 21046 USA Ref: Attestation Statements Part 2.911(d) (7) Filing Grantee Code: 2A3SY Applicant FRN: 0031685647 Hesung Innovation Limited certifies that, as of the date of the filing of the application, Cleveland International Trade Agency is our designated U.S. agent for service of process for the above referenced Grantee Code. Hesung Innovation Limited 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. Cleveland International Trade Agency 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 Grantee Code. Designated U.S. Agent Information:

Name: Cleveland International Trade Agency U.S. Agent FRN: 0033401837 Address: 4033 St Clair Ave, Cleveland, OH 44103, USA Contact Person: Becky Deng Tel.: (216) 600-0606 Email: Georgewu7012@gmail.com Sincerely, Signed on behalf of Hesung Innovation Limited | Signed on behalf of Cleveland International Trade Agency signature signature mere Per Young Name: Bera Yang Name: Becky Deng Title: Manager Title: Manager Date: 2023-08-16 Date: 2023-08-16

Hesung Innovation Limited Date: 2023-10-19 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements Part 2.911(d) (5) (i) Filing SUBJECT: FCC Application for FCC ID: 2A3SYMBL02 To Whom It May Concern:

Hesung Innovation Limited 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, siondeoy A TOs y -

[Bera Yang, Poject Manager]

Hesung Innovation Limited Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong 999077, China Date: 2023-10-19 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Ref: Attestation Statements Part 2.911(d) (5) (ii) Filing SUBJECT: FCC Application for FCC ID: 2A3SYMBLO2 To Whom It May Concern:

Hesung Innovation Limited certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing covered equipment. Sincerely, Bese, o-F-

[Bera Yang, Poject Manager]

Hesung Innovation Limited Date: 2023-10-19 FEDERAL COMMUNICATIONS COMMISSION AUTHORIZATION AND EVALUATION DIVISION 7435 OAKLAND MILLS ROAD COLUMBIA, MD 21046 FCC Class || Permissive Change Application Letter To Whom It May Concern:

This is to request a Class II permissive change, the following the original equipment:

Productname: Module FCC ID: 2A3SYMBLO2 Date of Grant: 03/11/2022 Model No.: MBLO2 Change Contents:

[ Location Old equipment of FCC ID: 2A3SYMBL02 New equipment of FCC ID: 2A3SYMBLO02 Antenna hs |

ww gt oz OF ob 05 09 TD stu Gs OZ OF OP OS G9 C2 CE CE QQEOL CF OC OP OF ad oc cy os 09 oz og 06 W0lor Cilio din aeiaton Added three antennas that can be selected. Modifications that do not change the fundamental RF characteristics and that do not degrade the unwanted emissions of the certified product, please refer to test report for more details;

Modifications that do not change physical characteristics. We attach new photographs to identify the modified product. Sincerely, Signatory Bevo Led

[Bera Yang, Poject Manager

Hesung Innovation Limited Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong 999077, China Date: 2023-10-19 FEDERAL COMMUNICATIONS COMMISSION AUTHORIZATION AND EVALUATION DIVISION 7435 OAKLAND MILLS ROAD COLUMBIA, MD 21046 SUBJECT: FCC Application for FCC ID: 2A3SYMBL02 MODULAR APPROVAL LETTER Regarding to the FCC 15.212, Hesung Innovation Limited would like to request modular approval for the submission FCC ID: 2A3SYMBLO2. Hesung Innovation Limited confirms that the product complies with numbered requirements identified below: :

1. The modular transmitter must have its own RF Shielding This EUT has its own shielding, please refers to external photos of the report. The modular transmitter must have buffered modulation/data inputs The EUT has buffered data inputs; it is integrated in chip BL2028N. 2. The modular transmitter must have its own power supply regulation The EUT interface provides 3.3VDC, and has its own VCC inside. 3. The modular transmitter must comply with the antenna and transmission system requirements of Sections 15.203, 15.204(b) and 15.204(c) The EUT meets the antenna requirements. It has a Integral antenna. Refer to the photo of antennas are shown in the internal photos. 4. The modular transmitter must be tested in a stand-alone configuration. The EUT is tested in an access point configuration via DC power. 5. The modular transmitter must be labeled with its own FCC ID number. The EUT has its own FCC ID and the label is visible. 6. The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacture must provide adequate instructions along with module to explain any such requirement. The EUT comply with all applicable FCC Rules. Warning detail refer to the user manual. 7. The modular transmitter must comply with any applicable RF exposure requirements. The EUT comply with all applicable RF exposure requirements. See this RF exposure report. Sincerely, Signatory Bera lon

[Bera Yang, Poject Manager

=Hesung Innovation Limited Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong 999077, China Date: 2023-10-19 FEDERAL COMMUNICATIONS COMMISSION AUTHORIZATION AND EVALUATION DIVISION 7435 OAKLAND MILLS ROAD COLUMBIA, MD 21046 SUBJECT: FCC Application for FCC ID: 2A3SYMBL02 POWER OF ATTORNEY To Whom It May Concern:

We, the undersigned, hereby authorize Waltek Testing Group (Shenzhen) Co., Ltd. Jandy So on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Waltek Testing Group (Shenzhen) Co., Ltd. Jandy So on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. We, Hesung Innovation Limited are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Sincerely, Signatory Beva fa

[Bera Yang, Poject Manager]

Hesung Innovation Limited Date: 2022-03-04 Subject: Ad Hoc Mode Function Declaration FCC ID: 2A3SYMBLO02 To Whom it may concern, This device is acting as slave and operating in the 2.4 GHz (2412-2462MHz for 802.1 1b/g/n(HT20); 2422-2452MHz for 802.11n(HT40)) band. Ad Hoc function is supported but not able to operate on non-US frequencies. Please contact the one signed below or the authorized agent for this filing. Thank you. Regards, Berane -

Name&Position: Bera Yang/Manager Company: Hesung Innovation Limited Adress: Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong, 999077 Tel.: +86-1382697 1634 Fax.: /

E-Mail: bera.yang@hesung.com

Hesung Innovation Limited Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong, 999077 Date: 2022-03-04 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2A3SYMBLO2 Confidentiality Request To whom it may concern, Pursuant to Sections 0.457 and 0.459 of the Commission's Rules, we hereby request confidential treatment of the information accompanying this application as outlined below:

& Block Diagram Tune-Up Information

& Operational Description Security Information XX Schematics Software Defined Radio (SDR) Parts List Information The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Hesung Innovation Limited

(Bera Yang)

(Manager)

Hesung Innovation Limited Room 803, Chevalier House, 45-51 Chatham Road South, Tsim Sha Tsui, Kowloon, Hong Kong, 999077

(FCC ID : 2A3SYMBLO2) POWER OF ATTORNEY DATE: 2022-03-04 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To Whom It May Concern:

We, the undersigned, hereby authorize Waltek Testing Group (Shenzhen) Co., Ltd. Jandy So on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Waltek Testing Group (Shenzhen) Co., Ltd. Jandy So on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. We, Hesung Innovation Limited are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Sincerely, Hesung Innovation Limited

(Bera Yang)

(Manager)