FCC ID: 2AFOS-WT32S3WROVERX WIFI Module

Wireless-Tag Technology Co., Ltd. V1.0.0 WT32-S3-WROVER WT32-S3-WROVER-I Datasheet 2.4GHz WIFi(802.11b/g/n) and Buletooth 5(LE) module Built around ESP32-S3 series of SoCs,Xtensa dual-core 32-bit LX7 microprocessor Flash up to 16 MB,PSRAM up to 8MB On-board PCB antenna or external antenna connector V1.0.0 Sept 16, 2021 Wireless-Tag Technology Co., Ltd I Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com Wireless-Tag Technology Co., Ltd. V1.0.0 This document provides users with the technical specifications for WT32-S3-WROVER1 and WT32-S3-WROVER2. Please visit Wireless-Tags official website to download the latest version of the document. About this document Document updates Revision history Please go to the document revision history page to view the revisions of the document. Disclaimer and copyright notice Information in this paper, including URL references, is subject to change without prior notice. This document is provided as is with no warranties whatsoever, including any warranty of merchantability, non-infringement, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification or sample. All liability, including liability for infringement of any patent rights, relating to use of information in this document is disclaimed. No licenses, either express or implied, by estoppel or otherwise, to any intellectual property rights are granted herein. All trade names, trademarks and registered trademarks mentioned in this document are property of their respective owners, and are hereby acknowledged. Copyright 2022 Wireless-Tag Technology Co., Ltd. All rights reserved. Statement Due to product version upgrade or other reasons, the contents of this manual may be changed. Wireless-Tag Technology Co., Ltd reserves the right to modify the contents of this manual without any notice or prompt. This manual is only used as a guide. Wireless-Tag Technology Co., Ltd makes every effort to provide accurate information in this manual, but it does not guarantee that the contents of the manual are completely free of errors. All statements, information and suggestions in this manual do not constitute any express or implied guarantee. II Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com Wireless-Tag Technology Co., Ltd. V1.0.0 Revision History No. Version Changes Change (+/-) Descriptions Author Date 1 V1.0.0 C First release Fiona Sept 16, 2021

*ChangesCcreate, Aadd, Mmodify, Ddelete III Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com Wireless-Tag Technology Co., Ltd. V1.0.0 Contents 1 Module Overview.............................................................................................................................1 1.1 Features................................................................................................................................. 1 1.2 Description............................................................................................................................ 2

...................................................................................................................... 3 1.3 Applications 2 Block Diagram................................................................................................................................. 4 3 Pin Definitions................................................................................................................................. 5 3.1 Pin Layout............................................................................................................................. 5 3.2 Pin description...................................................................................................................... 5 3.3 Strapping Pins....................................................................................................................... 7 4 Electrical Characteristics..................................................................................................................9 4.1 Absolute Maximum Ratings................................................................................................. 9 4.2 Recommended Operating Conditions...................................................................................9 4.3 Current Consumption Characteristics...................................................................................9 5 Application Note............................................................................................................................ 11 5.1 Module Dimensions............................................................................................................ 11 5.2 Reflow Profile..................................................................................................................... 11 5.3 Peripheral Schematic.......................................................................................................... 12 6 Product Trial...................................................................................................................................14 IV Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com Wireless-Tag Technology Co., Ltd. V1.0.0 ESP32-S3 series of SoCs embedded,Xtensa dual-core 32-bit LX7 microprocessor, 1 Module Overview 1.1 Features MCU up to 240MHz SRAM 512KB RTC SRAM 16KB ROM 384KB Up to 8 MB PSRAM WIFI IEEE 802.11b/g/n protocol Bit rate:802.11n uo to 150Mbps A-MPDU and A-MSDU aggregation 0.4 s guard interval support Bluetooth Bluetooth LE:Bluetooth5,Bluetooth mesh 2Mbps PHY Long range mode Advertising extensions Multiple advertisement sets Channel selection algorithm #2 Center frequency range of operating channel: 2412~2462 MHz Hardware Module interface: GPIO, SPI, LCD interface, UART, I2C, I2S, Camera interface, infrared remote control, pulse counter, LED PWM, USB 1.1 OTG, USB Serial/JTAG controller, MCPWM, SDIO host interface, GDMA, TWAI Controller (ISO 11898-1 Compliant), ADC, Touch Sensor, Temperature Sensor, Timer and Watchdog 40MHz crystal oscillator Up to 16 MB SPI flash 8 MB PSRAM Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 1 Wireless-Tag Technology Co., Ltd. V1.0.0 Operating voltage/Power supply: 3.0~3.6 V Operating ambient temperature: -40~85 Package size: (18 31 3.3) mm 1.2 Description WT32-S3-WROVER1 and WT32-S3-WROVER2 are two general-purpose Wi-Fi+Bluetooth low energy MCU modules, equipped with ESP32-S3 series chips. In addition to rich peripheral interfaces, the module also has powerful neural network computing capabilities and signal processing capabilities, which are suitable for various application scenarios in the AIoT field, such as wake word detection and voice command recognition, face detection and recognition, intelligent Home, smart home appliances, smart control panels, smart speakers, etc. WT32-S3-WROVER1 adopts PCB onboard antenna, WT32-S3-WROVER2 adopts connector to connect external antenna.equipped with 4 MB SPI flash and 8 MB SPI PSRAM. WT32-S3-WROVER1 and WT32-S3-WROVER2 uses ESP32-S3 chip. The ESP32-S3 chip is powered by an Xtensa 32-bit LX7 dual-core processor that operates at up to 240 MHz. The user can power down the CPU and use the low-power coprocessor to monitor the state changes of peripherals or whether certain analog quantities exceed thresholds. ESP32-S3 also integrates rich peripherals, including SPI, LCD interface, UART, I2C, I2S, Camera interface, infrared remote control, pulse counter, LED PWM, USB 1.1 OTG, USB Serial/JTAG controller, MCPWM, SDIO host Interface, GDMA, TWAI controller

(ISO 11898-1 compliant), ADC, touch sensor, temperature sensor, timer and watchdog. Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 2 Wireless-Tag Technology Co., Ltd. V1.0.0 1.3 Applications Generic low-power IoT sensor hub Generic low-power IoT data logger Camera video streaming OTT TV box/set-top box equipment USB device Voice recognition Image recognition Mesh network Home automation Smart home control panel Smart buildings Industrial Automation Smart agriculture Audio equipment Health/Medical/Nursing Wi-Fi toys Wearable electronic products Retail & Catering Smart POS application Smart door lock Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 3 Wireless-Tag Technology Co., Ltd. V1.0.0 2 Block Diagram Figure 1 Block Diagram Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 4 Wireless-Tag Technology Co., Ltd. V1.0.0 3 Pin Definitions 3.1 Pin Layout Figure 2 Pin Layout 3.2 Pin description Table 1 Pin Definitions and Descriptions Pin Name Description GND GPIO4 GPIO5 GPIO6 GPIO7 Ground RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3 RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4 RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5 RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6 EN Chip Enable pin:

High level: on, enables the chip. Low level: off, the chip powers off, low current. Note: Do not leave the EN pin floating. GPIO15 RTC_GPIO15,GPIO15,U0RTS,ADC2_CH4,XTAL_32K_P GPIO16 RTC_GPIO16,GPIO16,U0RTS,ADC2_CH5,XTAL_32K_N GPIO17 RTC_GPIO17,GPIO17,U1TXD,ADC2_CH6 GPIO18 RTC_GPIO17,GPIO17,U1TXD,ADC2_CH7,CLK_OUT3 GPIO8 RTC_GPIO8,GPIO8,TOUCH8,ADC1_CH7,SUBSPICS1 1 2 3 4 5 6 7 8 9 10 11 Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 5 Wireless-Tag Technology Co., Ltd. V1.0.0 Pin Name Description GPIO3 RTC_GPIO3,GPIO3,TOUCH3,ADC1_CH2 GPIO46 GPIO46 GPIO19 RTC_GPIO19,GPIO19,U1RTS,ADC2_CH8,CLK_OUT2,USB_D-

GPIO20 RTC_GPIO20,GPIO20,U1RTS,ADC2_CH9,CLK_OUT1,USB_D+

GPIO9 RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD, SUBSPIHD GPIO10 GPIO11 GPIO12 GPIO13 GPIO14 RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4, SUBSPICS0 RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5, SUBSPID RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6, SUBSPICLK RTC_GPIO13,GPIO13,TOUCH13,ADC2_CH2,FSPIQ,FSPIIO7, SUBSPIQ RTC_GPIO14,GPIO14,TOUCH14,ADC2_CH3,FSPIWP,FSPIDQS, SUBSPIWP GPIO21 RTC_GPIO21,GPIO21 GPIO0 RTC_GPIO0,GPIO0 GPIO47 SPICLK_P_DIFF, GPIO47, SUBSPICLK_P_DIFF GPIO48 SPICLK_N_DIFF, GPIO48, SUBSPICLK_N_DIFF VCC Power supply GPIO45 GPIO45 GPIO35 SPIIO6, GPIO35, FSPID, SUBSPID GPIO36 SPIIO7, GPIO36, FSPICLK, SUBSPICLK GPIO37 SPIDQS, GPIO37, FSPIQ, SUBSPIQ GPIO38 GPIO38, FSPIWP, SUBSPIWP GPIO39 MTCK, GPIO39, CLK_OUT3, SUBSPICS1 U0RXD U0RXD, GPIO44, CLK_OUT2 U0TXD U0TXD, GPIO43, CLK_OUT1 GPIO40 MTDO, GPIO40, CLK_OUT2 GND Ground GPIO41 MTDI, GPIO41, CLK_OUT1 GPIO42 MTMS, GPIO42 GPIO2 GPIO1 GND Ground RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1 RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 6 Wireless-Tag Technology Co., Ltd. V1.0.0 3.3 Strapping Pins ESP32-S3 series has four strapping pins. GPIO0 = IO0 GPIO45 = IO45 GPIO46 = IO46 GPIO3=IO3 Software can read the strapping values of these pins in the register "GPIO_STRAPPING". During the system reset of the chip (power-on reset, RTC watchdog reset, brown-out reset, analog super watchdog reset, crystal oscillator clock glitch detection reset), the Strapping pin has the same function as the one on its own pin. The level is sampled and stored in the latch, and the latch value is "0" or "1" and remains until the chip is powered off or turned off. IO0, IO45, IO46 are connected to internal weak pull-up/pull-down by default. If these pins are not externally connected or the connected external lines are in a high impedance state, the internal weak pull-up/pull-down will determine the default value of the input level of these pins. GPIO3 is in a floating state by default. The strapping value of GPIO3 can be used to switch the source of the JTAG signal inside the CPU, as shown in Figure 4. In this case, the strapping value is controlled by the external line, and the external line cannot be in a high impedance state. Table 3 lists all configuration combinations of EFUSE_DIS_USB_JTAG, EFUSE_DIS_PAD_JTAG and EFUSE_STRAP_JTAG_SEL to select the JTAG signal source. Table 2 Strapping Pins EFUSE_STRAP_JTAG_SEL 1 0 Dont care Dont care Dont care 0 0 0 1 1 EFUSE_DIS_USB_JTAG EFUSE_DIS_PAD_JTAG JTAG Signal Source 0 0 1 0 1 Refer to Table 3 USB Serial/JTAG controller USB Serial/JTAG controller On-chip JTAG pins N/A To change the value of the strapping, the user can apply an external pull-down/pull-up resistor, or use the GPIO of the host MCU to control the strapping pin level when the ESP32-S3 is powered on reset. After the reset is released, the strapping pins have the same functions as normal pins. Please refer to Table 3 for the detailed boot modes for configuring the strapping pins. Table 3Strapping pins Pin IO45 2 Default Pull-down VDD_SPI Voltage 3.3 V 1 0 Booting Mode 2 1.8 V 1 Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 7 Pin GPIO0 GPIO46 Pin IO46 Pin Wireless-Tag Technology Co., Ltd. Default Pull-up Pull-down Default Pull-down SPI Boot 1 Dot'

Enabled Enabling/Disabling ROM Messages Print During Booting V1.0.0 Download Boot 0 0 3 4 Disabled See the fourth note See the fourth note JTAG Signal Selection Default EFUSE_DIS_USB_JTAG=0,EFUSE_DIS_PAD_JTAG=0, EFUSE_STRAP_JTAG_SEL=1 GPIO3 N/A 0:JTAG signal from on-chip JTAG pins 1:JTAG signal from USB Serial/JTAG controller Note:

1. The VDD_SPI voltage is determined by the strapping value of GPIO45 or VDD_SPI_TIEH in eFuse. EFUSE_VDD_SPI_FORCE selection decision method in eFuse: 0: Determined by the strapping value of GPIO45; 1: Determined by EFUSE_VDD_SPI_TIEH in eFuse. 2. GPIO 46 = 1 and GPIO0 = 0 cannot be used. 3. The ROM Code is powered on and printed by default through the U0TXD pin, which can be switched to the GPIO17 (U1TXD) pin by the eFuse bit EFUSE_UART_PRINT_CHANNEL. 4.When both EFUSE_DIS_USB_SERIAL_JTAG and EFUSE_DIS_USB_OTG are 0, ROM boot messages will be printed to the USB Serial/JTAG controller. Otherwise, the messages will be printed to UART, controlled when EFUSE_UART_PRINT_CONTROL value is:

0, print is normal during boot and not controlled by GPIO46. 1 and GPIO46 is 0, print is normal during boot; but if GPIO46 is 1, print is disabled. 2 and GPIO46 is 0, print is disabled; but if GPIO46 is 1, print is normal. 3, print is disabled and not controlled by GPIO46. EFUSE_UART_PRINT_CONTROL. Specifically, GPIO46 and by Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 8 Wireless-Tag Technology Co., Ltd. V1.0.0 4 Electrical Characteristics 4.1 Absolute Maximum Ratings Table 4 Absolute maximum ratings Symbol Parameter Max Unit VDD33 Power supply voltage TSTORE Storage temperature 3.6 85 V Min

-0.3

-40 4.2 Recommended Operating Conditions Table 5 Recommended Operating Conditions Symbol VDD33 IV DD T Humidity Parameter Power supply voltage Current delivered by external power supply Ambient temperature Humidity condition Min 3.0 0.5 40 Typ 3.3 85 Max Unit 3.6 85 V A C

%RH 4.3 Current Consumption Characteristics With the use of advanced power-management technologies, the module can switch between different power modes. For details on different power modes, please refer to the tables below. Table 6 Current Consumption Depending on RF Modes Work mode Description Peak (mA) 802.11b, 1Mbps, @20.5dBm 802.11g, 54Mbps, @18dBm 802.11n, HT20, MCS7, @17dBm 802.11n, HT40, MCS7, @17dBm 802.11b/g/n, HT20 802.11n, HT40 TX RX 355 297 286 285 95 97 Active(RF working) Note:

1. The current consumption measurements are taken with a 3.3 V supply at 25 C of ambient temperature at the RF port. All transmitters measurements are based on a 100% duty cycle. Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 9 Wireless-Tag Technology Co., Ltd. V1.0.0 2. The current consumption figures in RX mode are for cases when the peripherals are disabled and the CPU is idle. Table 7 Current Consumption Depending on Work Modes Work mode Light-sleep Description Deep-sleep RTC memory and RTC peripherals are powered on. RTC memory is powered on. RTC peripherals are Hibernation powered off. Power off CHIP_PU is set to low level. The chip is powered off. Typ 240 8 7 1 Unit A A A A Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 10 Wireless-Tag Technology Co., Ltd. V1.0.0 5 Application Note 5.1 Module Dimensions Figure 3 Module Dimensions 5.2 Reflow Profile Figure 4 Reflow Profile Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 11 Wireless-Tag Technology Co., Ltd. V1.0.0 5.3 Peripheral Schematic This is the typical application circuit of the module connected with peripheral components (for example, power supply, antenna, reset button, JTAG interface, and UART interface). Figure 5 Module Schematics Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 12 Wireless-Tag Technology Co., Ltd. V1.0.0 5.4 Peripheral Design Schematic The application circuit diagram of the connection between the module and peripheral devices

(such as battery, antenna, reset button, JTAG interface, UART interface, etc.). Figure 6 Application circuit diagram Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 13 Wireless-Tag Technology Co., Ltd. V1.0.0 6 Product Trial Enquiry emailenquiry@wireless-tag.com Technical support emailtechnical@wireless-tag.com Copyright 2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved. http://www.wireless-tag.com 14 Federal Communication Commission Statement (FCC, U.S.) 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 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. 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:

Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. 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. IMPORTANT NOTES Co-location warning:

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. OEM integration instructions:

This device is intended only for OEM integrators under the following conditions:

The transmitter module may not be co-located with any other transmitter or antenna. The module shall be only used with the external antenna(s) that has been originally tested and certified with this module. As long as the conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.). Validity of using the module certification:

In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization for this module in combination with the host equipment is no longer considered valid and the FCC ID of the module cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. End product labeling:

The final end product must be labeled in a visible area with the following: Contains Transmitter Module FCC ID: 2AFOS-WT32S3WROVERX. Information that must be placed in the end user manual:

The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user's manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Integration instructions for host product manufactures according to KDB 996369 D03 OEM Manual v01 2.2 List of applicable FCC rules FCC Part 15 Subpart C 15.247 & 15.207 & 15.209 2.3 Specific operational use conditions The module is a Bluetooth module with WiFi & BLE 2.4G function. WiFi Specification Operation Frequency: 2412~2462MHz Number of Channel: 11 Modulation: DSSS, OFDM Type: PCB Antenna Gain: 2 dBi BLE Specification Operation Frequency: 2402~2480MHz Number of Channel: 40 Modulation: GFSK Type: PCB Antenna Gain: 2 dBi The module can be used for mobile or applications with a maximum 2dBi antenna. The host manufacturer installing this module into their product must ensure that the final composit product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operaition. The host manufacturer has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user's manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. 2.4 Limited module procedures Not applicable. 2.5 Trace antenna designs Not applicable. The module has its own antenna, and doesnt need a hosts printed board microstrip trace antenna etc. 2.6 RF exposure considerations The module must be installed in the host equipment such that at least 20cm is maintained between the antenna and users body; and if RF exposure statement or module layout is changed, then the host product manufacturer required to take responsibility of the module through a change in FCC ID or new application. The FCC ID of the module cannot be used on the final product. In these circumstances, the host manufacturer will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization 2.7 Antennas Antenna Specification are as follows:

Type: PCB Antenna Gain: 2 dBi This device is intended only for host manufacturers under the following conditions: The transmitter module may not be co-located with any other transmitter or antenna; The module shall be only used with the internal antenna(s) that has been originally tested and certified with this module. The antenna must be either permanently attached or employ a unique antenna coupler. As long as the conditions above are met, further transmitter test will not be required. However, the host manufacturer is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, 2.8 Label and compliance information Host product manufacturers need to provide a physical or e-label stating Contains Transmitter Module FCC ID: 2AFOS-WT32S3WROVERX with their finished product. 2.9 Information on test modes and additional testing requirements etc.) BLE Operation Frequency: 2402~2480MHz Number of Channel: 40 Modulation: GFSK WIFI Operation Frequency: 2412~2462MHz Number of Channel: 11 Modulation: DSSS, OFDM Host manufacturer must perfom test of radiated & conducted emission and spurious emission, etc according to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. Only when all the test results of test modes comply with FCC requirements, then the end product can be sold legally. 2.10 Additional testing, Part 15 Subpart B disclaimer The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 & 15.207 & 15.209 and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.

C5266091_X10_Ed.1 WIRELESS-TAG TECHNOLOGY CO., LIMITED. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Subject: Request for Confidentiality FCC ID: 2AFOS-WT32S3WROVERX Date: 6/8/2022 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules

(47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits ID Label/Location Attestation Statement External Photos Block Diagram Schematics Test Report Test Setup Photos Users Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) SDR Software / Security Info Long-Term Confidentiality No No No No No No Short-Term Confidentiality No No No No No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature:

Name: Louie Wang Date: 6/8/2022 Title: Manager 1/1

Letter of Authorization C5266091_X8_Ed.1 Company: WIRELESS-TAG TECHNOLOGY CO., LIMITED. Address: 801, Block A, Building 6, Shenzhen International Innovation Valley, Dashi 1st Road, Xili Community, Xili Street, Nanshan District, Shenzhen. Product Name: WIFI Module Model Number: WT32-S3-WROVER, WT32-S3-WROVER-I FCC Identifier: 2AFOS-WT32S3WROVERX We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Louie Wang Date: 6/8/2022 Title: Manager Signature of applicant:

1/1

WIRELESS-TAG TECHNOLOGY CO., LIMITED Model difference statement Product Name: WIFI Module Model No.: WT32-S3-WROVER, WT32-S3-WROVER-I We (WIRELESS-TAG TECHNOLOGY CO., LIMITED., 801, Block A, Building 6, Shenzhen International Innovation Valley, Dashi Road, Xili Community, Xili Street, Nanshan District, Shenzhen) hereby state that all the models are the same circuit and module, except the model name. Signature:

Name: Louie Wang Title: Manager Tel: 0755-22677752 Email: engineera@wireless-tag.com Date: 6.15.2022

C5266091_X9_Ed.2 WIRELESS-TAG TECHNOLOGY CO., LIMITED Modular Transmitter Approval Request Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Company name: WIRELESS-TAG TECHNOLOGY CO., LIMITED FCC ID: 2AFOS-WT32S3WROVERX Gentlemen, In accordance with 47CFR 15.212 Modular Transmitters and KDB 996369 D01 Module

. FCC ID: 2AFOS-WT32S3WROVERX has been examined Certification Guide v02 against the following requirements. Items to be covered by Single modular transmitters. Requirement per 15.212 and KDB 996369 D01 Modular Certification Guide v02 Explanation from Grantee

(do not write yes/no, but explain why product complies/how it is achieved) Yes, The module has its own RF shield 1. 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 2. 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 3. The module must contain power supply regulation on the module 4. 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 Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b) 5. The module must demonstrate compliance in a stand-

alone configuration 6. The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements) 7. The module must comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee 8. The module must comply with RF exposure requirements Yes, The module has data transmission function and supports 2.4G WIFI& BLE function. Module with power regulation and support for DC 3.3V input The module meets the antenna requirements. The module has been tested in a standalone configuration, see report for details The module has its own FCC ID number. See the label for details. The module meets any specific rules or operational requirements applicable to the transmitter Answer: The module complies with any applicable RF exposure requirements, as detailed in the instructions. Date: 2022-6-8 Name: Louie Wang Title: Manager Signature of applicant 1/1