User's Manual

3 U.S. FCC Statement

FCC ID: 2AC7ZESP868504

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

• This device may not cause harmful interference.

• This device must accept any interference received, including interference that may cause undesired opera-

tion.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part15

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.

Caution:

Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s

authority to operate the equipment.

This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This

device and its antenna must not be co-located or operating in conjunction with any other antenna or transmit-

ter.

The antennas used for this transmitter must be installed to provide a separation distance of at least 20 cm from all

persons and 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 module can be used to

installation in another host. The antenna must be installed such that 20 cm is maintained between the antenna

and users, and the transmitter module may not be co-located with any other transmit or antenna. The module

shall be only used with the integral antenna(s) that has been originally tested and certified with this module.

As long as 3 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 requirement with this module installed

(for example, digital device emission, PC peripheral requirements, etc.)

Espressif Systems 13 ESP8685-WROOM-04 User Manual v0.1