LMA Letter

FCC ID: 2AC7Z-ESPEYE

Cover Letter(s)

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FCCID_4210334

Company: ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD Add: Suite 204, Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China(201203) Tel: (8621)61062057 Fax:(8621)61062057 E-mail: linchunhua@espressif.com Applicant ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD FCC ID: 2AC7Z-ESPEYE Section 15.212 Modular Transmitters Request for Modular Approval Request for Limited Modular Approval  Requirements EUT Conditions Comply(Y/N) Single Modular Approval Requirements 1 The radio elements of the modular Refer to external photos. This N transmitter doesn't have their own module doesn't have shielding. The physical crystal and tuning shield cover. capacitors may be located external to the shielded radio elements. 2 The modular transmitter must have All inputs to the modules Y buffered modulation/data inputs (if such are buffered through logic inputs are provided) to ensure that the or microprocessor inputs. module will comply with part 15 Refer to Schematics. requirements under conditions of excessive data rates or over‐modulation. 3 The modular transmitter must have The Module uses the chip Y ESP32-D0WD with built-in power its own power supply regulation. management components, the module reted power is 5.0V power, Refer to schematics. 4 The modular transmitter must comply The modular Y with the antenna and transmission system transmitter has a PIFA requirements of §§15.203, 15.204(b) and antenna arrangement for 15.204(c). The antenna must either be Wi-Fi/Bluetooth/BLE, permanently attached or employ a Refer to internal photo. “unique” antenna coupler (at all connections between the module and the antenna, including the cable). The “professional installation” provision of §15.203 is not applicable to modules but can apply to limited modular approvals under paragraph (b) of this section.

5 The modular transmitter must be The modular transmitter is Y tested in a stand‐alone configuration, tested in a stand-alone i.e., the module must not be inside configuration, the another device during testing for module is not be inside compliance with part 15 another device when requirements. Unless the transmitter testing. module will be battery powered, it Please refer to setup must comply with the AC line photo. conducted requirements found in §15.207. AC or DC power lines and data input/output lines connected to the module must not contain ferrites, unless they will be marketed with the module (see §15.27(a)). The length of these lines shall be the length typical of actual use or, if that length is unknown, at least 10 centimeters to insure that there is no coupling between the case of the module and supporting equipment. Any accessories, peripherals, or support equipment connected to the module during testing shall be unmodified and commercially available (see §15.31(i)). 6 If using a permanently affixed label, Refer to the label. Y the modular transmitter must be labeled with its own FCC identification number, and, if the FCC identification number 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. This exterior label can use wording such as the following:“ContainsTransmitter Module FCC ID: 2AC7Z-ESPEYE”Any similarwording that expresses the same meaning may be used. The Grantee may either provide such a label, an example of which must be included

in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement. In the latter case, a copy of these instructions must be included in the application for equipment authorization. 7 The modular transmitter must Refer to manual Y 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. 8 The modular transmitter must The EUT comply with Y comply with any applicable RF any applicable RF exposure requirements in its final exposure requirements configuration. in its final configuration. Sincerely Yours, Signature: Typed or Printed Name: Chunhua.Lin Title: Manager


Document Created: 2019-03-23 10:15:59
Document Modified: 2019-03-23 10:15:59
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