FCC ID: 2AF6B-RAK3400 Bluetooth module

RAK4630 RAK3400 LoRa Module WisDuo Series Version V1.0 | December 2020 1 1 0 2 K A R 1 RAK4630 Table of Contents 1 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Introduction .........................................................3 Overview ..............................................................3 General description .............................................................................................3 Main Features ......................................................................................................3 Block Diagram......................................................................................................4 Pin Assignment.....................................................................................................5 Pin Description .....................................................................................................6 Power Consumption............................................................................................7 Absolute Maximum Ratings ................................................................................7 Recommended operating conditions ...................................................................8 3 Mechanical Dimensions ......................................9 Top and Side Dimensions ....................................................................................9 3.1 Recommended Footprint....................................................................................9 3.2 4 Recommended Reflow Profile..........................10 2 RAK4630 1 Introduction This document defines RAK3400 module and describes hardware interface which are connected with customers applications. This document helps customers quickly understand the interface specifications, electrical and mechanical details, as well as other related information of RAK3400. 1 1 0 2 K A R 2 Overview 2.1 General description RAK3400 is an BLE5.0 wireless communication module, it includes an nRF52840, Ultra-low power consumption of 2.0uA in sleep mode, and BLE output power up to 4dBm. The module supports BLE 5.0. Its RF communication capabilities make it suitable for a variety of applications in the IoT field. 2.2 Main Features Compact Form Factor: 15 x 23 x 3 mm 44 Pin Stamp Pad for PCB SMT mounting I/O ports: UART/I2C/GPIO/USB/SPI (optional NFC interface) Temperature range: -40C to +85C Supply voltage: 2.0 ~ 3.6V Ultra-Low Power Consumption 2.0uA in sleep mode BLE5.0 (Tx power -20 to +4 dBm in 4dB steps) 3 2.3 Block Diagram The following figure shows a block diagram of RAK3400. RAK4630 1 1 0 2 K A R Figure 1: Block Diagram 4 2.4 Pin Assignment The following figure shows the pin assignment of RAK3400 module. RAK4630 1 1 0 2 K A R NOTES Figure 2: Pin Assignment For single 3.3V power supply, connect VBAT_NRF, VDD_NRF, together with 3.3V power For 3.6V li-SOCL2 battery or 4.2V li-MnO2 battery, connect VBAT_NRF with battery output, VDD_NRF can use to indicate IO voltage level. Please dont power any chip with VDD_NRF. GND pins should be connected to ground in the design. VBAT_SX, VBAT_SX_IO is reserved, they are not connected to any chips in RAK3400 module. 5 1 1 0 2 K A R 2.5 Pin Description The following tables show the pin definition and description of RAK3400. Table 2: Definition of I/O Parameters RAK4630 Type PI PO DI DO IO AI AO Table 3: Pin Description Power Supply Pin Name VDD_NRF VBAT_NRF GND I2C Interface Pin Name I2C1_SDA I2C1_SCL I2C2_SDA I2C2_SCL USB Interface Pin Name VBUS USB_DP USB_DM UART Interface Pin Name UART1_TX UART1_RX UART1_DE UART2_TX UART2_RX UART2_DE Quad SPI Interface Pin Name SPI_CLK SPI_CS SPI_DIO0 SPI_DIO1 SPI_DIO2 SPI_DIO3 Pin No. 43 44 14,16, 22,35, 36,38, 42 Pin No. 4 5 23 24 Pin No. 1 3 2 Pin No. 10 9 11 7 6 8 Pin No. 29 34 33 32 31 30 Description Power Input Power Output Digital Input Digital Output Bidirectional Analog Input Analog Output Type PI PI Ground Description Power supply High Power supply Comment Type IO OD IO OD Type PI IO IO Type DO DI DI DO DI DI Type DO DO IO IO IO IO Description I2C serial data I2C serial clock I2C serial data I2C serial clock Comment P0.13 P0.14 P0.24 P0.25 Description USB power USB differential data(+) USB differential data(-) Description UART1 transmit UART1 receive UART1 detect UART2 transmit UART2 receive UART2 detect Description SPI clock SPI chip select SPI data input/output 0 SPI data input/output 1 SPI data input/output 2 SPI data input/output 3 Comment 5V input for 3.3V regulator Comment P0.20 P0.19 P0.21 P0.16 P0.15 P0.17 Comment P0.03 P0.26 P0.30 P0.29 P0.28 P0.02 6 SWD Interface Pin Name SWDIO Pin No. 19 Type Debug SWCLK 18 Debug RESET Pin Name RESET NFC Interface Pin Name NFC1 NFC2 Antenna Interface Pin Name RF_BT GPIO Interface Pin Name GPIO P1.01 GPIO P1.02 GPIO P1.03 GPIO P1.04 Pin No. 17 Pin No. 13 12 Pin No. 15 Type DI Type DI DI Type IO Pin No. 25 Type IO 26 27 28 IO IO IO ADC Interface Pin Name GPIO P0.31 / AIN7 Pin No. 39 Type IO / AI GPIO P0.05 / AIN3 GPIO P0.04 / AIN7 40 41 IO / AI IO / AI RAK4630 Comment Description SWD I/O for debug and programming SWD clock input for debug and programming Description Reset the module Description NFC input 1 NFC input 2 Comment Comment P0.09 P0.10 Description Bluetooth antenna interface Comment 50 Impedance If unused, keep this pin open Comment Comment Description General-purpose input/output General-purpose input/output General-purpose input/output General-purpose input/output Description General-purpose IO /

General purpose ADC interface General-purpose IO /

General purpose ADC interface General-purpose IO /

General purpose ADC interface 2.6 Power Consumption The following table show the power consumption. Table 4: Power Consumption Item Tx mode BT@4dBm Rx mode BT@2Mbps Sleep mode Power Consumption 9mA 11.5mA 2.0uA Condition BT Tx mode BT Rx mode BT sleep 2.7 Absolute Maximum Ratings 7 1 1 0 2 K A R 1 1 0 2 K A R The following table show the absolute maximum ratings of RAK3400 RAK4630 Table 5: Absolute Maximum Ratings Symbol VDD_NRF VBUS VBAT_NRF ESD HBM ESD CDM Description MCU power supply USB supply voltage MCU high voltage power supply Human Body Model Charged Device Model 2.8 Recommended operating conditions Min.

-0.3

-0.3

-0.3

Nom.

Max. 3.9 5.8 5.8 2000 500 Unit V V V V V The following table shows the recommended operating conditions of RAK3400. Table 6: Recommended operating conditions Symbol VDD_NRF VBUS VBAT_NRF Description NRF52840 power supply VBUS USB supply voltage NRF52840 high voltage power supply Min. 2.0 4.35 2.5 Nom. 3.3 5.0

Max. 3.6 5.5 5.5 Unit V V V 8 3 Mechanical Dimensions RAK4630 1 1 0 2 K A R This chapter describes the mechanical dimensions of the module. All dimensions are measured in millimeter (mm), and the dimensions tolerances are 0.05mm unless otherwise specified. 3.1 Top and Side Dimensions The following figure shows the mechanical dimension of the RAK3400 module. Figure 3: Top and Side Dimensions 3.2 Recommended Footprint The following figure shows the recommended footprint of the RAK3400 module. Figure 4: Recommended Footprint (Unit: mm) 9 RAK4630 4 Recommended Reflow Profile The following figure shows the Recommended Reflow Soldering Thermal Profile of RAK3400. 1 1 0 2 K A R Figure 5: Recommended Reflow Soldering Thermal Profile 10 RAK4630 Statement 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 Caution:

Changes or modifications not expressly approved by the part responsible for compliance could void the user's authority to operate the equipment. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. FCC Statement:

"This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help."

IC statement:

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement.

This equipment complies with Industry Canada radiation exposure limits set forth for an uncontrolled environment. Cet quipement est conforme l'exposition aux rayonnements Industry Canada limites tablies pour un environnement non contrl. The proposed FCC IC label format is to be placed on the module. If it is not visible when the module is installed into the system, Contains FCC ID: 2AF6B-RAK3400, Contains IC: 25908-RAK3400 shall be placed on the outside of final host system. Labelling This radio transmitter [25908-RAK3400] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device. Le prsent metteur radio [25908-RAK3400] a t approuv par Innovation, Sciences et Dveloppement conomique Canada pour fonctionner avec les types d'antenne numrs cidessous et ayant un gain admissible maximal. Les types d'antenne non inclus dans cette liste, et dont le gain est suprieur au gain maximal indiqu pour tout type figurant sur la liste, sont trictement interdits pour l'exploitation de l'metteur. Antenna info Antenna type: IPEX Antenna Manufacturer: Shenzhen RAKwireless Technology Co., Ltd. Model name: 501-0132-X1 Antenna gain: 1.68dBi 11

RAK3401 RA K20 11 RAK3401 Breakout Module WisCore-LoRa Series Version V1.0 | December 2020 1 1 RAK3401 Table of Contents 1 Introduction ........................................................................................................................................3 2 Overview..............................................................................................................................................3 General description......................................................................................................................3 3 2.1 2.2 Main Features ..............................................................................................................................3 2.3 Board Realistic View...................................................................................................................4 2.4 RAK3401 Mounting Sketch ........................................................................................................4 2.5 Schematic Diagram .....................................................................................................................4 2.5.1 WisConnector .................................................................................................................5 2.5.2 WisConnector pin order..................................................................................................5 2.5.3 Core module....................................................................................................................5 SWD interface.................................................................................................................6 2.5.4 Power up automatic reset ................................................................................................6 2.5.5 Flash Memory .................................................................................................................7 2.5.6 2.6 Absolute Maximum Ratings........................................................................................................7 2.7 Recommended operating conditions ...........................................................................................8 3 Mechanical Dimensions......................................................................................................................8 Figure Index Figure 1: RAK3401s top layer (left), and bottom layer (right). ............................................................4 Figure 2: RAK3401 mounting sketch........................................................................................................4 Figure 3: WisConnector pin definition. ....................................................................................................5 Figure 4: WisConnector pin order. ...........................................................................................................5 Figure 5: Cora module pin definition. ......................................................................................................6 Figure 6: SWD interface. ..........................................................................................................................6 Figure 7: Power up automatic reset ...........................................................................................................7 Figure 8: Flash Memory. ..........................................................................................................................7 Figure 9: Mechanical Dimensions .............................................................................................................8 RA K20 11 2 2 RAK3401 1 Introduction This document explains the design of the RAK3401 module and describes a hardware interface that is important to understand in order to build customized applications. This document helps customers quickly to understand the interface specifications, electrical and mechanical details, as well as other relevant information of RAK3401 module. RA K20 11 2 Overview 2.1 General description The RAK3401 module is part of the WisBlock series, specifically, its one of the modules that belong to the WisCore category. The RAK3401 is a breakout module designed to work with RAK5005 baseboard. Essentially, it is a RAK3400 stamp module with an expansion PCB and connectors compatible with the RAK5005 baseboard. It allows an easy way to access to the pins of the RAK3400 module in order to simplify development and testing processes. The module itself comprises a RAK3400 as its main component. The RAK3400 is a combination of a nRF52840 MCU, it features ultra-low power consumption of 2.0uA during sleep mode, and the BLE interface with output power up to 4dBm. 3 The RF communication characteristic of the module (BLE) makes it suitable for a variety of applications in the IoT field such as home automation, sensor networks, building automation, personal area networks applications (health/fitness sensors, and monitors, etc.). 2.2 Main Features I/O ports: UART/I2C/GPIO/USB/SPI (optional NFC interface) Temperature range: -40C to +85C Supply voltage: 2.0 ~ 3.6V Ultra-Low Power Consumption 2.0uA in sleep mode BLE5.0 (Tx power -20 to +4dBm in 4dB steps) Serial Wire Debug (SWD) interface Module size: 20 x 30mm 3 2.3 Board Realistic View RAK3401 RA K20 11 Figure 1: RAK3401s top layer (left), and bottom layer (right). 2.4 RAK3401 Mounting Sketch The RAK3401 module is designed to work with the RAK5505 baseboard. Figure 2 shows how a RAK3401 module should be mounted on top of the RAK5505. Figure 2: RAK3401 mounting sketch. 2.5 Schematic Diagram The following chapters will describe the breakout module schematic. It includes WisConnector, core module, SWD interface, power up automatic reset, and memory flash. 4 4 2.5.1 WisConnector The breakout module allows the RAK3400 stamp modules pinout to be transferred to board-to-board connector, Figure 3 shows the definition of this connector. RAK3401 RA K20 11 Figure 3: WisConnector pin definition. 2.5.2 WisConnector pin order Figure 4 shows the pin order of the WisConnector, which is located in the bottom layer of the module. Figure 4: WisConnector pin order. 2.5.3 Core module The breakout module itself has a RAK3400 at its core, Figure 5 shows the core module pin and connection information, by default, the NFC function is disabled for conserve the low power characteristic. 5 5 RAK3401 RA K20 11 Figure 5: Cora module pin definition. 2.5.4 SWD interface The breakout module exposes a SWD debug interface, Figure 6 shows the connection information. Additionally, the RST pin is used for resetting the core module RAK3400. Figure 6: SWD interface. 2.5.5 Power up automatic reset The breakout module has a power-up automatic reset circuit, Figure 7 shows the automatic reset mechanism, this module also can be reset though RAK5005 reset pin. 6 6 RAK3401 RA K20 11 Figure 7: Power up automatic reset 2.5.6 Flash Memory The RAK3400 module comprises a flash memory controlled by the SPI interface. The memory size is 8 MB. Figure 8: Flash Memory. Power Consumption Table shows the power consumption characteristic of the RAK3401 module. Table 1: Power Consumption Item Tx mode BT@4dBm Rx mode BT@2Mbps Sleep mode Power Consumption 9mA 11.5mA 2.0uA Condition BT Tx mode BT Rx mode BT sleep 2.6 Absolute Maximum Ratings Table shows the absolute maximum ratings of RAK3400 Table 2: Absolute Maximum Ratings Symbol Description Min. Nom. Max. Unit 7 7 VDD_NRF MCU power supply VBUS USB supply voltage VBAT_NRF MCU high voltage power supply ESD HBM Human Body Model ESD CDM Charged Device Model

-0.3

-0.3

-0.3

RAK3401 3.9 5.8 5.8 2000 500 V V V V V RA K20 11 2.7 Recommended operating conditions Table shows the recommended operating conditions of RAK3400. Table 3: Recommended operating conditions Symbol Description VDD_NRF NRF52840 power supply VBUS VBUS USB supply voltage VBAT_NRF NRF52840 high voltage power supply Min. 2.0 4.35 2.5 Nom. Max. Unit 3.3 5.0

3.6 5.5 5.5 V V V 8 3 Mechanical Dimensions Figure 9 shows the physical dimension of the RAK3401 module. Figure 9: Mechanical Dimensions 8 RA K20 11 RAK3401 Statement 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 Caution:

Changes or modifications not expressly approved by the part responsible for compliance could void the user's authority to operate the equipment. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. FCC Statement:

"This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help."

IC statement:

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement.

This equipment complies with Industry Canada radiation exposure limits set forth for an uncontrolled environment. Cet quipement est conforme l'exposition aux rayonnements Industry Canada limites tablies pour un environnement non contrl. 9 The proposed FCC IC label format is to be placed on the module. If it is not visible when the module is installed into the system, Contains FCC ID: 2AF6B-RAK3400, Contains IC: 25908-RAK3400 shall be placed on the outside of final host system. Labelling This radio transmitter [25908-RAK3400] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device. Le prsent metteur radio [25908-RAK3400] a t approuv par Innovation, Sciences et Dveloppement conomique Canada pour fonctionner avec les types d'antenne numrs cidessous et ayant un gain admissible maximal. Les types d'antenne non inclus dans cette liste, et dont le gain est suprieur au gain maximal indiqu pour tout type figurant sur la liste, sont trictement interdits pour l'exploitation de l'metteur. Antenna info Antenna type: IPEX Antenna Manufacturer: Shenzhen RAKwireless Technology Co., Ltd. Model name: 501-0132-X1 Antenna gain: 1.68dBi 9

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TechnologyCo., Ltd.

58mm Arial Bold 4 pt PRODUCT: WisGate Edge Pro Model: RAK7229CV2 POE Input: 48V 0.3A Input: 12V 1A FCC ID: 2AF6B-RAK7229CV2 Contains FCC ID: 2AF6B-RAK6342AF6B-RAK5146, XMR201807EG95NA2AF6B-RAK51482AF6B-RAK3400 Contains IC: 25908-RAK634, 25908-RAK5146, 10224A-2018EG95NA, 25908-RAK5148,25908-RAK3400 GWEUI: XXXXXXXXX MADE IN CHINA XXXXXXXXXXXX, XXXXXX

: 5mm WEEE logo : 7.5mm 23mm Arial Bold 4 pt 58mm Arial Regular 6.8pt 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. 23mm Above information located on surface of device

Authority to Act as Agent Date: 2023-08-18 TUV Rheinland of North America, Inc. 1279 Quarry Lane., Suite. A Pleasanton, CA 94566 To Whom It May Concern:

I appoint __________ TUV Rheinland (Shenzhen) Co., Ltd. _______ to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the FCC or Industry Canadas regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by TUV Rheinland Group, still resides with ____Shenzhen RAKwireless Technology Co., Ltd. / Room 506, Building B, New Compark, Pingshan First Road, Taoyuan Street, Nanshan District, Shenzhen, Guangdong, China_________. For TCB applications, We certify that we are not subject to 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. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you, Agency Agreement Date:

________12 Months_______ Agreement is valid for 12 months from the above date. By:

(Signature) ___Vivian Xu________________

(Print name) __Certification Engineer_______

(Title) ___+8619926584202__________

(Telephone) On behalf of:

_Shenzhen RAKwireless Technology Co., Ltd.____________________

(Company Name) Page 1 of 1

@ RAK Certification Designating a US Agent for Service of Process To: Federal Communications Commission Date: 2024-03-13 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Attestation Statement Part 2.911(d)(7) filing FCC ID: 2AF6B-RAK3400 Shenzhen RAKwireless Technology Co., Ltd. (the applicant) certifies that as of the date of the filing of the application, Agent Company Name (the agent) is our designated U.S. agent. We acknowledge the applicants consent and the designated agent for service of processs obligation to accept service of process. The applicant accepts to maintain an agent for service of process 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. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. APPLICANT Company Name: Shenzhen RAKwireless Technology Co., Ltd. Contact Person: Vivian Xu Address: Room 506, Building B, New Compark, Pingshan First Road, Taoyuan Street, Nanshan District, Shenzhen, Guangdong, China Tel.: +8619926584202 Email: shasha.xu@rakwireless.com FCC FRN: 0024961310 U.S. Agent Company Name: USA MEIHUA TRADING INC Contact Person: Harley Quinn Address: 5379 Pine Valley Ct Boulder CO 80301 United States Tel.: 1-312-363-9424 Email: meihua-trading-inc@foxmail.com FCC FRN: 0033406166 Sincerely yours,

| The Applicant The Agent

| Company Name | Shenzhen RAKwireless Technology Co., | USA MEIHUA TRADING INC Ltd.

| Contact Person | Vivian Xu Harley Quinn

Class II permissive change letter Date: 19 March 2024 Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AF6B-RAK3400 Shenzhen RAKwireless Technology Co., Ltd. is herein submitting a class II permissive change filing for the following changes. Accommodate the LTE Module with FCC ID: XMR201807EG95NA, Wi-Fi Module with FCC ID:

2AF6B-RAK634, Lora Module*2 with FCC ID: 2AF6B-RAK5148, FCC ID: 2AF6B-RAK5146 and BLE Module with FCC ID: 2AF6B-RAK3400 into the Host system WisGate Edge Pro with HMN:

RAK7229CV2. Module LTE module 2.4GHz Wi-Fi module Originally FCCC ID FCC ID: XMR201807EG95NA FCC ID: 2AF6B-RAK634 Originally granted date 2018-07-20 2021-10-21 Lora module Lora module BLE module FCC ID: 2AF6B-RAK5148 FCC ID: 2AF6B-RAK5146 FCC ID: 2AF6B-RAK3400 2023-09-01 2021-09-22 2021-04-25 Shenzhen RAKwireless Technology Co., Ltd. declares the module are same as original granted without any changes, the co-location radiated spurious emissions, conducted emissions and RF Exposure evaluation were carried out. The detailed implementation, operation and method is explained as per operation description exhibit. Sincerely,

By Title On behalf of

(Signature) Vivian Xu

(Print Name) Certification Engineer Telephone

+86 134 8091 2134 Shenzhen RAKwireless Technology Co.,Ltd.

(Company Name)

TCB FCC Request for Confidentiality Letter Date: 2024-03-13 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Confidentiality Request for FCC ID: 2AF6B-RAK3400 Pursuant to FCC 47 CRF 0.457(d), the applicant requests that a part of the subject FCC/IC application be held confidential. Type of Confidentiality Requested Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Permanent n/a Permanent Permanent Permanent Permanent Permanent Permanent Permanent Exhibit Block Diagrams External Photo Internal Photos ***

Operation Description/Theory of Operation Schematics Test Setup***

Tune-Up Procedure Users Manual***

Part List/ Antenna Construction Shenzhen RAKwireless Technology Co., Ltd. has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality:

The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public.

(*** Exceptional case for Permanent Confidentiality for these Exhibits by PAG only) Short-Term Confidentiality:

The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify TUV Rheinland in the event information regarding the product or the product is made available to the public. TUV Rheinland will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Sincerely, By:

Tel: +8619926584202 Email: shasha.xu@rakwireless.com _______________________________________________ ____________ Vivian Xu ____________

(Print name)

(Signature/Title) Page 1 of 1 uncontrolled when printed out

Attestation Statements Not Covered Entity Applicant To: Federal Communications Commission Date: 2024-03-13 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(ii) filing FCC ID: 2AF6B-RAK3400

[Shenzhen RAKwireless Technology 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing covered equipment. Sincerely yours, Applicant Signature Printed Name: Vivian Xu Title: Certification Engineer Address: Room 506, Building B, New Compark, Pingshan First Road, Taoyuan Street, Nanshan District, Shenzhen, Guangdong, China Tel.: +8619926584202 Email: shasha.xu@rakwireless.com

Attestation Statements Not Covered Equipment To: Federal Communications Commission Date: 2024-03-13 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) filing FCC ID: 2AF6B-RAK3400

[Shenzhen RAKwireless Technology 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 yours, Applicant Signature Printed Name: Vivian Xu Title: Certification Engineer Address: Room 506, Building B, New Compark, Pingshan First Road, Taoyuan Street, Nanshan District, Shenzhen, Guangdong, China Tel.: +8619926584202 Email: shasha.xu@rakwireless.com

Date: 2021-02-25 FCC ID:2AF6B-RAK3400 IC: 25908-RAK3400 Type of Module: Single Modular Transmitter No. 1 Requirements The radio elements of the modular transmitter must have their own shielding. The physical crystal and tuning capacitors may be located external to the shielded radio elements. Device Conditions The module has its own RF shielding. Refer to the external photos. Comply (Y/N) Y The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the module will comply with part 15 requirements under conditions of excessive data rates or over-modulation. The EUT has buffered modulation/data inputs. Its integrated on the chipset IC U3 /

NRF52840. Refer to the schematics diagram. The modular transmitter must have its own power supply regulation. The module has its own power supply regulation. The modular transmitter must comply with the antenna and transmission system requirements of 15.203, 15.204(b) and 15.204(c). The antenna must either be permanently attached or employ a unique antenna coupler. The antenna is IPEX antenna and antenna gain is 1.68dBi. The modular transmitter must be tested in a stand-

alone configuration, i.e., the module must not be inside another device during testing for compliance with part 15 requirements. The modular transmitter was tested in a stand-alone configuration via a laptop PC USB interface. The modular transmitter must be equipped with either a permanently affixed label or must be capable of electronically displaying its FCC identification number. FCC ID is permanently on the PCB. Refer to the Label Location and Label. The User Manual instruction that the OEM how to use the label. Y Y Y Y Y Y The modular transmitter must comply with any specific rules or operating requirements that ordinarily apply to a complete transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. A copy of these instructions must be included in the application for equipment authorization. The modular transmitter must comply with any applicable RF exposure requirements in its final configuration. Refer to the test report. Y If you have any questions regarding this, please dont hesitate to contact us. Sincerely, _________________________

(Vivian Xu / engineer) Shenzhen Rakwireless Technology Co., Ltd. 2 3 4 5 6 7 8