FCC ID: 2A3VE-TCM-F401-W4S Wierless Communication Modules

User manual Table of Contents Functional Description ............................................................................................................................................................... 2 Overview ............................................................................................................................................................................ 2 Product Features ............................................................................................................................................................... 2 Subject of Application ........................................................................................................................................................ 2 Electrical Characteristics ............................................................................................................................................................ 3 Basic electrical parameters ................................................................................................................................................ 3 RF Parameter ..................................................................................................................................................................... 3 Power ................................................................................................................................................................................. 4 Pin ...................................................................................................................................................................................... 4 Boot ................................................................................................................................................................................... 5 Minimum system schematic diagram ................................................................................................................................ 5 Welding Temperature Curve .............................................................................................................................................. 5 Dimensions ................................................................................................................................................................................ 6 Size ..................................................................................................................................................................................... 6 FCC Statement ........................................................................................................................................................................... 7 ISED Statement .......................................................................................................................................................................... 8 Functional Description Overview TCM-F401-W4 is an ultra-low power WiFi module. It has a very competitive package size and ultra-low energy consumption technology. It is designed for mobile devices and Internet of Things applications. It can connect users'physical devices to Wi-Fi wireless networks, communicate with the Internet or LAN, and realize networking functions. TCM-F401-W4 is packaged with low cost PCB antenna, which brings very low cost to customers'products. Integrates a Tensilica L106 32-bit RISC processor, maximum clock speed of 160 MHz. Product Features 32Mbit SPI NORD FLASH,250K RAM Supplort 802.11 b/g/n Supplort STAAPSTA+AP Installed TCP/IP Supplort Enrich Socket AT Supplort UARTSPIIICSDIOGPIO Supplort ESP TouchAI LinkAirkiss Supplort OTA Low power 3.3V Single Power Subject of Application Smart Plug Home Automation Mest Net Smart light Baby monitor Sensor network Wireless Location Sensing Device Wireless Positioning System Signal Security ID tag Electrical Characteristics Basic electrical parameters Char Vil Vih Iil Vol Voh Cpad Vio Imax Tamb MIN

-0.3 0.75xVio 0.8xVio 1.8

-40 MAX 0.25xViO 3.3 50 0.1 xVio 5 3.3 12 125 UNIT V V nA V V pF V mA C RF Parameter describe IN Frequency IN impedance IN Reflect PA Power @72.2Mbps PA Power @802.11b sensitivity CCK 1Mbps CCK 11Mbps 6Mbps(1/2BPSK) 54Mbps(3/4 64-QAM) OFDM6Mbps OFDM54Mbps HT20MCS0 HT20MCS7 HT20MCS765Mbps72.2Mbps Adjacent frequency suppression Min Typ Max Unit 2412 2437 2462 MHz

-17.81

-18.96

-18.77 dBm 14 50 15

-98

-91

-93

-75

-71 37 21 37 20

-10 16 dB dBm dBm dBm dBm dBm dBm dB dB dB dB Min Typ Max Unit Send 802.11bCCK 5.5MbpsPout= -17.81dBm

-18.96

-18.77

-17.81 mW Send 802.11gOFDM18 MbpsPout= -19.75Bm

-22.74

-19.88

-19.55 mW Send 802.11nMCS4Pout= -19.52dBm

-20.56

-20.08

-19.14 mW Power Mode Pin PIN Function Description 1 5 7 8 15 21 22 RST IO14 IO13 VCC GND RXD0 TXD0 1Resets 1GPIO 1GPIO 1VCC 1Ground 1UART-RX 1UART-TX Boot 1 0 0 GPIO15 GPIO0 GPIO2 X 0 1 X 1 1 SDIO/SPI WIFI UART Download Flash BOOT Minimum system schematic diagram Welding Temperature Curve Refer to IPC/JEDEC standardPeak Temperature : <250CNumber of Times: 2 times Dimensions Size FCC 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. Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. NOTE: 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 in stallation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordan ce with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that int erference 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 inter ference 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. Important Note:

Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment sho uld be installed and operated with minimum distance 20cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Country Code selection feature to be disabled for products marketed to the US/Canada. This device is intended only for OEM integrators under the following conditions:

1. The antenna must be installed such that 20 cm is maintained between the antenna and users, and 2. The transmitter module may not be co-located with any other transmitter or antenna, 3. For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band by supplied fir mware programming tool. OEM shall not supply any tool or info to the end-user regarding to Regulatory Domain change. (i f modular only test Channel 1-11) As long as the three conditions above are met, further transmitter testing will not be required. However, the OEM integrat or is still responsible for testing their end-product for any additional compliance requirements required with this module in stalled. Important Note:

In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another tra nsmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product. In t hese circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) a nd obtaining a separate FCC authorization. End Product Labeling The final end product must be labeled in a visible area with the following" Contains FCC ID: 2A3VE-TCM-F401-W4S ". Manual Information to the End User 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 users 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. Antenna information The Wireless Communication Modules has been designed to pass certification with the antenna listed below. The required antenna impedance is 50 ohms. ISED Statement

- English: This device complies with Industry Canada licenseexempt RSS standard(s). Operation is subject to the following two conditions: (1) This device may not cause interference, and (2) This device must a ccept any interference, including interference that may cause undesired operation of the device. The digital apparatus complies with Canadian CAN ICES3 (B)/NMB3(B). French: Le prsentappareilestconforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitationestautorise aux deux conditions suivantes: (1) l'appareil ne doit pas produire de br ouillage, et (2) l'utilisateur de l'appareildoit accepter tout brouillageradiolectriquesubi, mmesi le brouillageest susceptibl e d'encompromettre le fonctionnement. This radio transmitter (ISED certification number: 28014-TCMF401W4S) has been approved by Industry Canada to operate with the antenna types listed with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Le prsent metteur radio (ISED certification number: 28014-TCMF401W4S) a t approuv par Industrie Canada pour fonctionner avec les types d'antenne numrs ci-dessous 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, sont strictement interdits pour l'exploitation de l'metteur. Radiation Exposure Statement This equipment complies with Canada 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. Dclaration d'exposition aux radiations Cet quipement est conforme Canada limites d'exposition aux radiations dans un environnement non contrl. Cet quipement doit tre install et utilis distance minimum de 20cm entre le radiateur et votre corps. This device is intended only for OEM integrators under the following condition:

The transmitter module may not be co-located with any other transmitter or antenna. As long as the condition above is 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. Cet appareil est conu uniquement pour les intgrateurs OEM dans les conditions suivantes:

Le module metteur peut ne pas tre complant avec un autre metteur ou antenne. Tant que les 1 condition ci-dessus sont remplies, des essais supplmentaires sur l'metteur ne seront pas ncessaires. Toutefois, l'intgrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformit supplmentaires requis pour ce module install. Important Note:

In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the Canada authorization is no longer considered valid and the IC 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 Canada authorization. Note Importante:

Dans le cas o ces conditions ne peuvent tre satisfaites (par exemple pour certaines configurations d'ordinateur portable ou de certaines co-localisation avec un autre metteur), l'autorisation du Canada n'est plus considr comme valide et l' IC ne peut pas tre utilis sur le produit final. Dans ces circonstances, l'intgrateur OEM sera charg de rvaluer le produit final (y compris l'metteur) et l'obtention d'une autorisation distincte au Canada. End Product Labeling The final end product must be labeled in a visible area with the following: Contains IC: 28014-TCMF401W4S. Plaque signaltique du produit final Le produit final doit tre tiquet dans un endroit visible avec l'inscription suivante: Contient des IC: 28014-TCMF401W4S Manual Information to the End User 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 users 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. Manuel d'information l'utilisateur final L'intgrateur OEM doit tre conscient de ne pas fournir des informations l'utilisateur final quant la faon d'installer ou de supprimer ce module RF dans le manuel de l'utilisateur du produit final qui intgre ce module. Le manuel de l'utilisateur final doit inclure toutes les informations rglementaires requises et avertissements comme indiqu dans ce manuel.

Ce) GF TCM-F401-W4 FCC ID:2A3VE-TCM-F401-W4S 1C:28014-TCMF401W4S ISM 2.4GHz PA+25dBm 802.11b/g/n

C5266091_X10_Ed.2 NATHER Ventilation System Co.,Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2021-12-20 Subject: Request for Confidentiality FCC ID: 2A3VE-TCM-F401-W4S To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules

(47CFRO.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure.

| Exhibits Long-Term Short-Term

| Confidentiali Confidentiality OTE 2 ID Label/Location Attestation Statement External Photos Block Diagram

+t Schematics Test Report [Wo No Test Setup Photos es Users Manual [[] Note Oo Internal Photos [[] Note 1 oO Parts List / Tune Up & Oo

[ RF Exposure Info [No No Operational Description & O Cover Letter(s | No | No 2 SDR Software / Security Info oO NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See Il. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of days from the date of the Grant of Equipment Authorization and prior to marketing. 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, wane xen WANG xiaomei 1/1

Date :2022-8-11 Declaration To Whom It May Concern:

We declare that we have reduced the power of the RF chip (ESP8266EX) through software, The problems arising therefrom shall be borne by NATHER Ventilation System Co.,Ltd. Sincerely Yours, Signature:

Typed or Printed Name:Wang xiaomei Title:Manager

C5266091_X8_Ed.1 NATHER Ventilation System Co.,Ltd. Letter of Authorization Company: NATHER Ventilation System Co.,Ltd. Address: No. 2688, Xingping ist Road, Pinghu Economic-

Technological Development Zone, Jiaxing City, Zhejiang Province, China. Product Name: Wierless Communication Modules Model Number: TCM-F401-W4 FCC Identifier: 2A3VE-TCM-F401-W4S 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: WANG xiaomei Date: 2021-12-20 Title: Project Manager Signature of applicant: WAN] jim es 1/1

C5266091_X9_Ed.2 NATHER Ventilation System Co.,Ltd. Modular Transmitter Approval Request Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Company name: NATHER Ventilation System Co.,Ltd. FCC ID: 2A3VE-TCM-F401-W4S Gentlemen, In accordance with 47CFR 15.212 Modular Transmitters and KDB 996369 DO1 Module Certification Guide v02. FCC ID 2A3VE-TCM-F401-W4S has been examined against the following requirements. Items to be covered by Single modular transmitters. 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 assembl 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 Name: WANG xiaomei Title: Project Manager Signature of applicant: Wh (n xn wey 1/1 Antenna is independent fixed The module has its own RF shielding. The modular has buffered data inputs, it is integrated in chip The modular has power supply regulation All power lines derived from the host device are regulated before energizing other circuits internal The label is independent fixed Compliant with all applicable FCC rules. Detail instructions are given in the User's Manual Approved to comply with the applicable RF exposure requirement, please see the MPE evaluation with 20cm as the distance restriction. Date: 2022-01-20