2ADMF-ESP8266ESP 8266 WIFI Module Kit

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April 27, 2020 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2ADMF-ESP8266 Product Name: ESP 8266 WIFI Module Kit Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...) Schematics Block diagram Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Dated this April 27, 2020 By: Mr Zuo Signature Printed Title: General Manager On behalf of : Shenzhen KEYES DIY Robot Co.,Ltd Telephone: +86-0755-23200269 Shenzhen KEYES DIY Robot Co.,Ltd

FCC ID: 2ADMF-ESP8266

20mm 10mm Label Location FCC ID: 2ADMF-ESP8266 Shenzhen KEYES DIY Robot Co.,Ltd. Model name: ESP 8266 WIFI Module Kit Model No.: ESP 8266 WIFI MODULE 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 ID: 2ADMF-ESP8266

RF Exposure evaluation According to 447498 D01 General RF Exposure Guidance v06 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz. Power and distance are rounded to the nearest mW and mm before calculation. The result is rounded to one decimal place for comparison. Worse case is as below: [2412MHz 0.960dBm（1.25 mW）output power] (1.25mW /5mm)·[√2.412(GHz)]= 0.4 < 3.0 for 1-g SAR Then SAR evaluation is not required.

FCC TEST REPORT FCC ID: 2ADMF-ESP8266 On Behalf of Shenzhen KEYES DIY Robot Co.,Ltd ESP 8266 WIFI Module Kit Model No.: ESP 8266 WIFI MODULE Prepared for : Shenzhen KEYES DIY Robot Co.,Ltd Address : Room9A Jingxing Building, Changyong Road,Long Hua Xin Qu District, Shenzhen, China. Prepared By : Shenzhen Alpha Product Testing Co., Ltd. Address : Building i, No.2, Lixin Road, Fuyong Street, Bao’an District, 518103, Shenzhen, Guangdong, China Report Number : A1912206-C06-R04 Date of Receipt : December 23, 2019 Date of Test : December 23, 2019-February 20, 2020 Date of Report : February 20, 2020 Version Number : V0 Page 2 of 58 Report No.: A1912206-C06-R04 TABLE OF CONTENTS Description Page 1. Summary of Standards And Results ------------------------------------------------------------------- 6 1.1. Description of Standards and Results ------------------------------------------------------------ 6 2. General Information -------------------------------------------------------------------------------------- 7 2.1. Description of Device (EUT) ---------------------------------------------------------------------- 7 2.2. Accessories of Device (EUT) --------------------------------------------------------------------- 8 2.3. Tested Supporting System Details ---------------------------------------------------------------- 8 2.4. Block Diagram of connection between EUT and simulators --------------------------------- 8 2.5. Test Mode Description ----------------------------------------------------------------------------- 9 2.6. Test Conditions ------------------------------------------------------------------------------------ 10 2.7. Test Facility ---------------------------------------------------------------------------------------- 10 2.8. Measurement Uncertainty ----------------------------------------------------------------------- 11 2.9. Test Equipment List ------------------------------------------------------------------------------ 12 3. Spurious Emission --------------------------------------------------------------------------------------- 13 3.1. Test Limits ----------------------------------------------------------------------------------------- 13 3.2. Test Procedure ------------------------------------------------------------------------------------- 13 3.3. Test Setup ------------------------------------------------------------------------------------------ 14 3.4. Test Results ---------------------------------------------------------------------------------------- 15 4. Power line Conducted Emission ---------------------------------------------------------------------- 21 4.1. Test Limits ----------------------------------------------------------------------------------------- 21 4.2. Test Procedure ------------------------------------------------------------------------------------- 21 4.3. Test Setup ------------------------------------------------------------------------------------------ 21 4.4. Test Results ---------------------------------------------------------------------------------------- 22 5. Conducted Maximum Output Power --------------------------------------------------------------- 23 5.1. Test limits ------------------------------------------------------------------------------------------ 23 5.2. Test Procedure ------------------------------------------------------------------------------------- 23 5.3. Test Setup ------------------------------------------------------------------------------------------ 23 5.4. Test Results ---------------------------------------------------------------------------------------- 23 6. Peak Power Spectral Density -------------------------------------------------------------------------- 25 6.1. Test limits ------------------------------------------------------------------------------------------ 25 6.2. Test Procedure ------------------------------------------------------------------------------------- 25 6.3. Test Setup ------------------------------------------------------------------------------------------ 25 6.4. Test Results ---------------------------------------------------------------------------------------- 26 7. Bandwidth ------------------------------------------------------------------------------------------------- 33 7.1. Test limits ------------------------------------------------------------------------------------------ 33 7.2. Test Procedure ------------------------------------------------------------------------------------- 33 7.3. Test Setup ------------------------------------------------------------------------------------------ 33 7.4. Test Results ---------------------------------------------------------------------------------------- 33 8. Band Edge Check ---------------------------------------------------------------------------------------- 46 8.1. Test limits ------------------------------------------------------------------------------------------ 46 8.2. Test Procedure ------------------------------------------------------------------------------------- 46 8.3. Test Setup ------------------------------------------------------------------------------------------ 46 8.4. Test Results ---------------------------------------------------------------------------------------- 46 9. Antenna Requirement ---------------------------------------------------------------------------------- 55 Page 3 of 58 Report No.: A1912206-C06-R04 9.1. Standard Requirement ---------------------------------------------------------------------------- 55 9.2. Antenna Connected Construction --------------------------------------------------------------- 55 9.3. Results ---------------------------------------------------------------------------------------------- 55 10. Test setup photo ------------------------------------------------------------------------------------------ 56 10.1. Photos of Radiated emission -------------------------------------------------------------------- 56 10.2. Photos of Conducted Emission test ------…

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FCC ID: 2ADMF-ESP8266 ESP 8266 WIFI Module Kit 9