2AC7Z-ESP868504Wi-Fi &BluetoothInternet ofThings Module

ESP8685­WROOM­04 User Manual Pre-release v0.1 Espressif Systems Copyright © 2022 www.espressif.com About This Document This user manual shows how to get started with the ESP8685-WROOM-04 module. Document Updates Please always refer to the latest version onhttps://www.espressif.com/en/support/download/documents. Revision History For revision history of this document, please refer to thelast page. Documentation Change Notification Espressif provides email notifications to keep you updated on changes to technical documentation. Please sub- scribe atwww.espressif.com/en/subscribe. Certification Download certificates for Espressif products fromwww.espressif.com/en/certificates. Contents Contents 1 Overview4 1.1 Module Overview4 1.2 Pin Description5 2 Get Started on ESP8685­WROOM­047 2.1 What You Need7 2.2 Hardware Connection7 2.3 Set up Development Environment8 2.3.1 Install Prerequisites8 2.3.2 Get ESP-IDF8 2.3.3 Set up Tools9 2.3.4 Set up Environment Variables9 2.4 Create Your First Project9 2.4.1 Start a Project9 2.4.2 Connect Your Device9 2.4.3 Configure9 2.4.4 Build the Project10 2.4.5 Flash onto the Device11 2.4.6 Monitor12 3 U.S. FCC Statement13 4 Learning Resources15 4.1 Must-Read Documents15 4.2 Important Resources15 Revision History16 Espressif Systems3ESP8685-WROOM-04 User Manual v0.1 1 Overview 1Overview 1.1Module Overview ESP8685-WROOM-04 is a general-purpose Wi-Fi and Bluetooth LE module. The rich set of peripherals and a small size make this module an ideal choice for smart homes, industrial automation, health care, consumer electronics, etc. ESP8685-WROOM-04 comes with a PCB antenna. Table 1: ESP8685­WROOM­04 Specifications CategoriesParametersSpecifications Wi-Fi Protocols IEEE 802.11 b/g/n (1T1R mode with data rate up to 150 Mbps) Frequency range2412~2462 MHz Bluetooth ® ProtocolsBluetooth ® LE: Bluetooth 5 and Bluetooth mesh Radio Class-1, class-2 and class-3 transmitter AFH AudioCVSD and SBC Hardware Module interfaces GPIO, SPI, UART, I2C, I2S, remote control peripheral, LED PWM controller, general DMA controller, TWAI ® controller (compatible with ISO 11898-1), USB Seri- al/JTAG controller, temperature sensor, SAR ADC Integrated crystal40 MHz crystal oscillator Operating voltage/Power supply3.0 V~3.6 V Operating currentAverage: 80 mA Minimum current delivered by power supply 500 mA Ambient temperature–40 °C~+105 °C Moisture sensitivity level (MSL)Level 3 Espressif Systems4ESP8685-WROOM-04 User Manual v0.1 1 Overview 1.2Pin Description Keepout Zone IO0 1 IO1 2 EN 3 IO24 IO4 5 IO5 6 IO67 TXD016 3V38 RXD015 IO314 IO10 13 IO912 IO8 11 IO7 10 GND 9 17 GND GNDGNDGND GNDGND GNDGNDGND Figure 1: Pin Layout (Top View) The module has 17 pins. See pin definitions in Table2. Table 2: Pin Definitions NameNo.Type 1 Function IO01I/O/TGPIO0￿ADC1_CH0, XTAL_32K_P IO12I/O/TGPIO1, ADC1_CH1, XTAL_32K_N EN3I High: on, enables the chip. Low: off, the chip powers off. Default: internally pulled-up IO24I/O/TGPIO2, ADC1_CH2, FSPIQ IO45I/O/TGPIO4, ADC1_CH4, FSPIHD, MTMS, LED PWM IO56I/O/TGPIO5, ADC2_CH0, FSPIWP, MTDI, LED PWM IO67I/O/TGPIO6, FSPICLK, MTCK, LED PWM 3V38PPower supply Cont’d on next page Espressif Systems5ESP8685-WROOM-04 User Manual v0.1 1 Overview Table 2 – cont’d from previous page NameNo.Type 1 Function GND9,17PGround IO710I/O/TGPIO7, FSPID, MTDO, LED PWM IO811I/O/TGPIO8 IO912I/O/TGPIO9 IO1013I/O/TGPIO10, FSPICS0, LED PWM IO314I/O/TGPIO3, ADC1_CH3, LED PWM RXD015I/O/TGPIO20, U0RXD TXD016I/O/TGPIO21, U0TXD 1 P: power supply; I: input; O: output; T: high impedance. Espressif Systems6ESP8685-WROOM-04 User Manual v0.1 2 Get Started on ESP8685-WROOM-04 2Get Started on ESP8685­WROOM­04 2.1What You Need To develop applications for ESP8685-WROOM-04 module you need: •1 x ESP8685-WROOM-04 module •1 x Espressif RF testing board •1 x USB-to-Serial board •1 x Micro-USB cable •1 x PC running Linux In this user guide, we take Linux operating system as an example. For more information about the configuration on Windows and macOS, please refer toESP-IDF Programming Guide. 2.2Hardware Connection 1.Solder the ESP8685-WROOM-04 module to the RF testing board as shown in Figure2. Figure 2: Hardware Connection 2.Connect the RF testing board to the USB-to-Serial board via TXD, RXD, and GND. 3.Connect the USB-to-Serial board to the PC. 4.Connect the RF testing board to the PC or a power adapter to enable 5 V power supply, via the Micro-USB cable. 5.During download, connect IO0 to GND via a jumper. Then, turn ”ON” the testing board. 6.Download firmware into flash. For details, see the sections below. 7.After download, remove the jumper on IO9 and GND. Espressif Systems7ESP8685-WROOM-04 User Manual v0.1 2 Get Started on ESP8685-WROOM-04 8.Power up the RF testing board again. ESP8685-WROOM-04 will switch to working mode. The chip will read programs from flash upon initialization. Note: IO9 is internally logic high. If IO9 is set to pull-up, the Boot mode is selected. If this pin is pull-down or left floating, the Download mode is selected. For more information on ESP8685-WROOM-04, please refer to ESP8685-WROOM-04 Datasheet. 2.3Set up Development Environment The Espressif IoT Development Framework (ESP-IDF for short) is a framework for developing applications based on the Espressif chips. Users can develop applications with ESP chips in Windows/Linux/macOS based on ESP-IDF. Here we take Linux operating system as an example. 2.3.1Install Prerequisites To compile with ESP-IDF you need to get the following packages: •CentOS 7 & 8: sudo yum -y update && sudo yum install git wget flex bison gperf python3 python3-pip python3-setuptools cmake ninja-build ccache dfu-util libusbx •Ubuntu and Debian: sudo apt-get install git wget flex bison gperf python3 python3-pip python3-setuptools cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0 •Arch: sudo pacman -S --needed gcc git make flex bison gperf python-pip cmake ninja ccache dfu-util libusb Note: •This guide uses the directory~/esp on Linux as an instal…

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C5266091_X10_Ed.2 1/1 EspressifSystems(Shanghai)Co.,Ltd. Exhibit PursuanttotheprovisionsofSections0.457and0.459ofCommission'srules(47CFR0.457,0.459),weare requestingtheCommissiontowithholdthefollowingattachment(s)asconfidentialdocumentfrompublic disclosure Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Subject: Request for Confidentiality FCC ID:2AC7Z-P868504 Date:2022.7.25 To Whom It May Concern, . sLong-Term Confidentiality Short-Term Confidentiality NOTE2 IDLabel/LocationNoNo AttestationStatementNoNo ExternalPhotosNo ☐ BlockDiagram☒☐ Schematics ☒☐ TestReportNoNo TestSetupPhotosNo ☐ User’sManual ☐ NOTE 1 ☐ InternalPhotos ☐ NOTE 1 ☐ PartsList/TuneUp ☒☐ RFExposureInfoNoNo OperationalDescription ☒☐ CoverLetter(s)NoNo SDRSoftware/SecurityInfo ☐ No NOTE1:Long-TermConfidentialitymaybepermittedunderspecialconditions(SeeII.LONG-TERM CONFIDENTIALITY,Section3ofKDB726920,uselastinforce) NOTE2:Short-TermConfidentialitycanberequestedforamaximumof180daysfromthedateofthegrant. Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofabovedocumentsmightbe harmfultoourcompanyandwouldgivecompetitoranunfairadvantageinthemarket. Incaseofshort-termConfidentiality,theapplicantrequeststheexhibitsselectedabovearewithheldfrom publicviewforaperiodof______daysfromthedateoftheGrantofEquipmentAuthorizationandprior tomarketing. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatandcorrespondentduring certificationreviewprocesscannotbegrantedasconfidentialdocumentsandthoseinformationwillbe availableforpublicreviewoncethegrantofequipmentauthorizationisissued. Sincerely, Signature: Name: MiaZhou Title:PM

C5266091_X8_Ed.1 1/1 Letter of Authorization Espressif Systems (Shanghai) Co.,Ltd. Company: Espressif Systems (Shanghai) Co.,Ltd. Address: Suite 204, Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China Product Name: Wi-Fi &BluetoothInternet ofThings Module Model Number: ESP8685-WROOM-04 FCC Identifier: 2AC7Z-ESP868504 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: Mia Zhou Date: 2022.7.25 Title: PM Signature of applicant:

Modular Approval Request Letter FCC ID:2AC7Z-ESP868504 Gentlemen: Data:August 30, 2022 There’s a Wi-Fi & Bluetooth Internet of Things Module that would like to have your authorization as a modular approval. The specific product as below, with its designed features and specified description, meets special requirements for full modular approval on FCC Public Notice 15.212 Released: June 26, 2000 by cross-reference list below. CompanyEspressif Systems (Shanghai) Co.,Ltd. Model NameWi-Fi & Bluetooth Internet of Things Module ESP868 5-WROOM-0 Model Number 4 FCC ID 2AC7Z-ESP868504 Requirement of Public Notice 15.212Reference toESP8685-WROOM-04 1. The modular transmitter must have its own RF shielding.The module has its own RF shielding. Please see external photo.pdf 2. The modular transmitter must have buffered modulation/data inputs. The modular has buffered data inputs, it is integrated in chip^WΘςΘρ Please see schematic.pdf 3. The modular transmitter must have its own power supply regulation. All power lines derived from the host device are regulated before energizing other circuits internal to the ^WΘςΘρ. Please see schematic.pdf 4. The modular transmitter must comply with the antenna requirements of Section 15.203 and 15.204(c). TheESP8685-WROOM-04 meet the FCC antenna requirements. 5. The modular transmitter must be tested in a stand-alone configuration, i.e., the module must not be inside another device during testing. TheESP8685-WROOM-04was tested in a stand-alone configuration via com serial interface. Please see test set-up photo.pdf 6. The modular transmitter must be labeled with its own FCC ID number, and, if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. The label position ofESP8685-WROOM-04is clearly indicated. If the FCC ID of the module cannot be seen when it is installed, then the host label must include the text: Contains FCC ID: 2AC7Z-ESP868504. Please see the label.pdf 7. The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. A copy of these instructions must be included in the application for equipment authorization. TheESP8685-WROOM-04is compliant with all applicable FCC rules. Detail instructions are given in the Users Manual. Please see user manual.pdf 8. The modular transmitter must comply with any applicable RF exposure requirements. For example, FCC Rules in Sections 2.1091, 2.1093 and specific Sections of Part 15, including 15.319(i), 15.407(f), 15.253(f) and 15.255(g), require that Unlicensed PCS, UNII and millimeter wave devices perform routine environmental evaluation for RF Exposure to demonstrate compliance. In addition, spread spectrum transmitters operating under Section 15.247 are required to ad dress RF Exposure compliance in accordance with Section 15.247(b)(4). TheESP8685-WROOM-04is approved to comply with the applicable RF exposure requirement, please see the MPE evaluation with 20cm as the distance restriction. Thank you. Sincerely, Mia Zhou /Certification Manager Espressif Systems (Shanghai) Co.,Ltd.

EUT Appearance Report No.: R2105A0444 TA Technology (Shanghai) Co., Ltd. Page 1 of 1 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. EUT Appearance a: EUT Picture 1: Constituents of EUT

I TA Techno This report sh Interna Internal photo ology (Shang hall not be repr al photo ghai) Co., L roduced except td. tin full, without t the written ap pproval of TA Te FCC ID echnology (Shan D: 2AC7Z-ESP Pa nghai) Co., Ltd. 868503 age 1 of 1

Prepared by: Liu Wei Approved by: Fan Guangchang TA Technology (Shanghai) Co., Ltd. Building 3, No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China TEL: +86-021-50791141/2/3 FAX: +86-021-50791141/2/3-8000 EMC TEST REPORT Applicant Espressif Systems (Shanghai) Co.,Ltd. FCC ID 2AC7Z-ESP868504 Product Wi-Fi & Bluetooth Internet of Things Module Brand ESPRESSIF Model ESP8685-WROOM-04 Report No. R2105A0444-E1V2 Issue Date August 22, 2022 TA Technology (Shanghai) Co., Ltd. tested the above equipment in accordance with the requirements in FCC Code CFR47 Part15B (2021)/ ANSI C63.4-2014. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. EMC Test Report Report No.: R2105A0444-E1V2 TA Technology (Shanghai) Co., Ltd. TA-MB-06-001E Page 2 of 20 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. Table of Contents 1 Test Laboratory ............................................................................................................................... 5 1.1 Notes of the Test Report ......................................................................................................... 5 1.2 Test facility .............................................................................................................................. 5 1.3 Testing Location ...................................................................................................................... 5 2 General Description of Equipment under Test ................................................................................ 6 2.1 Applicant and Manufacturer Information.................................................................................. 6 2.2 General information ................................................................................................................. 6 2.3 Applied Standards ................................................................................................................... 7 2.4 Test Mode ................................................................................................................................ 8 3 Test Case Results .......................................................................................................................... 9 3.1 Radiated Emission .................................................................................................................. 9 3.2 Conducted Emission ............................................................................................................. 14 4 Uncertainty Measurement ............................................................................................................ 17 5 Main Test Instruments .................................................................................................................. 18 ANNEX A: The EUT Appearance ................................... ...................................................................... 19 ANNEX B: Test Setup Photos .............................................................................................................. 20 EMC Test Report Report No.: R2105A0444-E1V2 TA Technology (Shanghai) Co., Ltd. TA-MB-06-001E Page 3 of 20 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. Version Revision description Issue Date Rev.0 Initial issue of report. July 20, 2022 Rev.1 Update FCC ID. August 12, 2022 Rev.2 Update description. August 22, 2022 Note: This revised report (Report No. R2105A0444-E1V2) supersedes and replaces the previously issued report (Report No. R2105A0444-E1V1). Please discard or destroy the previously issued report and dispose of it accordingly. EMC Test Report Report No.: R2105A0444-E1V2 TA Technology (Shanghai) Co., Ltd. TA-MB-06-001E Page 4 of 20 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. Summary of measurement results Number Test Case Clause in FCC Rules Conclusion 1 Radiated Emission FCC Part15.109, ANSI C63.4-2014 PASS 2 Conducted Emission FCC Part15.107, ANSI C63.4-2014 PASS Date of Testing: May 25, 2021 ~ November 30, 2021 and July 11, 2022 ~ July 19, 2022 Date of Sample Received: May 25, 2021 Note: All indications of Pass/Fail in this report are opinions expressed by TA Technology (Shanghai) Co., Ltd. based on interpretations and/or observations of test results. Measurement Uncertainties were not taken into account and are published for informational purposes only. EMC Test Report Report No.: R2105A0444-E1V2 TA Technology (Shanghai) Co., Ltd. TA-MB-06-001E Page 5 of 20 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 1 Test Laboratory 1.1 Notes of the Test Report This report shall not be reproduced in full or partial, without the written approval of TA technology (shanghai) co., Ltd. The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. Measurement Uncertainties were not taken into account and are published for informational purposes only. This report is written to support regulatory compliance of the applicable standards stated above. 1.2 Test facility FCC (Designation number: CN1179, Test Firm Registration Number: 446626) TA Technology (Shanghai) Co., Ltd. has been listed on the US Federal Communications Commission list of test facilities recognized to perform measurements. A2LA (Certificate Number: 3857.01) TA Technology (Shanghai) Co., Ltd. has been listed by American Association for Laboratory Accreditation to perform measurement. 1.3 Testing Location Company: TA Technology (Shanghai) Co., Ltd. Address: Building 3, No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China City: Shanghai Post code: 201201 Country: P. R. China Co…

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Company Name: ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD Add: Suite 204, Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China (201203) Tel: (8621)61065209 Fax: (8621)61065209 E-mail: [email protected] Antenna Declaration for ESP8684-WROOM-04 Date: 2020-09-20 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AC7Z-ESP868504 To: whom it may concern, ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD hereby declares that ESP8684- WROOM-04 use the same PCB antenna as test report Y2102A0260-T3V1. The antenna design and gain is consist with the report. Sincerely Yours, Signature: Typed or Printed Name:Mia Zhou Title: Manager

OTA TEST REPORT TA Technology (Shanghai) Co., Ltd. tested the above equipment in accordance with the requirements in ANSI/IEEE Std 149-2008. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. Prepared by: Xu Ying Approved by: Xu Kai TA Technology (Shanghai) Co., Ltd. Building 3, No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China TEL: +86‐021‐50791141/2/3 FAX: +86‐021‐50791141/2/3‐8000 Applicant Espressif System (Shanghai) Co.,Ltd Product ESP32-C3-WROOM-02 Model ESP-ANT B Report No. Y2102A0260-T3V1 Issue Date September 21, 2022 OTA Test Report Report No: Y2102A0260-T3V1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 2 of 15 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. TABLE OF CONTENTS 1. Test Laboratory .............................................................................................................................. 4 1.1. Notes of the Test Report ................................................................................................... 4 1.2. Test facility ........................................................................................................................ 4 1.3. Testing Location ................................................................................................................ 4 1.4. Laboratory Environment .................................................................................................... 5 2. General Description of Equipment under Test ............................................................................... 6 2.1. Applicant and Manufacturer Information ............................................................................ 6 2.2. General information ........................................................................................................... 6 2.3. Test Date ........................................................................................................................... 6 2.4. Receiving Date .................................................................................................................. 6 2.5. Applied Standards ............................................................................................................. 7 3. Test Conditions .............................................................................................................................. 8 3.1. Test Configuration ............................................................................................................. 8 3.2. Test Measurement ............................................................................................................. 8 4. Test Results ................................................................................................................................... 9 4.1. Gain and Efficiency ............................................................................................................ 9 5. Equipment List ............................................................................................................................. 10 ANNEX A 3-D Pattern Plots ................................................................................................................... 11 ANNEX B: The EUT Appearance, Antenna plots and Test Configuration ................................................ 13 B.1 EUT Appearance ................................................................................................................... 13 B.2 Antenna plots ........................................................................................................................ 14 B.3 Test Configuration ................................................................................................................. 15 OTA Test Report Report No: Y2102A0260-T3V1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 3 of 15 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. Version Revision description Issue Date Rev.0 Initial issue of report. March 9, 2021 Rev.1 Update information in Page 6 and 14. September 21, 2022 Note: This revised report (Report No. Y2102A0260-T3V1) supersedes and replaces the previously issued report (Report No. Y2102A0260-T3). Please discard or destroy the previously issued report and dispose of it accordingly. OTA Test Report Report No: Y2102A0260-T3V1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 4 of 15 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 1. Test Laboratory 1.1. Notes of the Test Report This report shall not be reproduced in full or partial, without the written approval of TA technology (shanghai) co., Ltd. The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein .Measurement Uncertainties were not taken into account and are published for informational purposes only. This report is written to support regulatory compliance of the applicable standards stated above. 1.2. Test facility A2LA (Certificate Number: 3857.01) TA Technology (Shanghai) Co., Ltd. has been listed by American Association for Laboratory Accreditation to perform measurement. 1.3. Testing Location Company: TA Technology (Shanghai) Co., Ltd. Address: Building 3, No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China City: Shanghai Post code: 201201 Country: P. R. China Contact: Xu Kai Telephone: +86-021-50791141/2/3 Fax: +86-021-50791141/2/3-8000 Website: http://www.ta-shanghai.com E-mail: [email protected] OTA Test Report Report No: Y2102A0260-T3V1 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 5 of 15 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 1.4. L…

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