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FCC ID 2AC7Z-ESPS3WROOM1

Espressif ESPS3WROOM1 module FCC filing (2AC7Z-ESPS3WROOM1)

Public FCC record for Espressif ESPS3WROOM1 (2AC7Z-ESPS3WROOM1), a digital transmission system device filed by Espressif Systems (Shanghai) Co., Ltd. Public exhibits include external photos, internal photos, a user manual, and RF exposure information. Radio evidence covers 2.4 GHz Wi-Fi / Bluetooth.

Espressif Systems (Shanghai) Co., Ltd.
2AC7Z-ESPS3WROOM1
Networking
Sep 8, 2022
Plain-English filing summary

What this FCC record tells you

ESPS3WROOM1 is the device filed under FCC ID 2AC7Z-ESPS3WROOM1 by Espressif Systems (Shanghai) Co., Ltd.

Public exhibits include internal and external photos, a user manual, RF exposure information, and wireless test reports.

The strongest extracted details are internal and external photos, wireless test measurements, and manual excerpts.

Those exhibits help verify what the device looks like, how its radios were tested, and setup or use details from the manual.

The listed radio coverage includes 2.4 GHz Wi-Fi / Bluetooth.

Manual excerpts cover reset steps, power details, and placement guidance.

Terms in this filing

FCC ID
A public identifier assigned to a wireless device authorization.
Grantee Code
The manufacturer/applicant portion of an FCC ID.
DTS
FCC equipment class for digital transmission systems.
Part 15C
FCC rules for many unlicensed intentional radiators.
Official FCC facts

FCC filing details

Raw application fields from the FCC record, shown separately from the plain-English summary.

Grantee code2AC7ZThe FCC-assigned applicant code at the start of the FCC ID.
Product code-ESPS3WROOM1The filing-specific product code. It is not always the retail product name.
Application purposeClass II Permissive ChangeShows whether the FCC action was an original authorization, change, or related filing update.
FCC equipment classDTS - digital wireless transmitterIn plain English, this covers wireless data transmitters such as Wi-Fi or Bluetooth-style radios.
FCC rule partsPart 15C - low-power wireless rulesPart 15C is the FCC rule bucket used for many low-power Wi-Fi, Bluetooth, and similar transmitters.
Application IDmQVd+EBrIVV6cijuR70Nzg==The FCC tracking ID for this application batch.
Filing timeline

What changed in this filing

A quick read on what each public FCC application changed or confirmed, with source links attached.

Feb 27, 2026

Class II Permissive Change

FCC application

This FCC application appears to be a permitted change to an already-authorized device, with the matching grant and public exhibits grouped together.

  • Application ID: xhsUVYWT5KURcCkyU/d7ag==
  • Equipment class: DTS - digital wireless transmitter
  • FCC rules: Part 15C - low-power wireless rules
  • Bands: 2.4 GHz Wi-Fi / Bluetooth: 1 range
  • Public exhibits: user manual, external photos, internal photos, RF exposure, RF test report
Sep 8, 2022

Class II Permissive Change

FCC application

This FCC application appears to be a permitted change to an already-authorized device, with the matching grant and public exhibits grouped together.

  • Application ID: mQVd+EBrIVV6cijuR70Nzg==
  • Equipment class: DTS - digital wireless transmitter
  • FCC rules: Part 15C - low-power wireless rules
  • Bands: 2.4 GHz Wi-Fi / Bluetooth: 2 ranges
  • Public exhibits: user manual, external photos, internal photos, RF exposure, RF test report
Sep 7, 2022

Class II Permissive Change

FCC application

This FCC application appears to be a permitted change to an already-authorized device, with the matching grant and public exhibits grouped together.

  • Application ID: DVhIf55r5XfjgknxlwjgXQ==
  • Equipment class: DTS - digital wireless transmitter
  • FCC rules: Part 15C - low-power wireless rules
  • Bands: 2.4 GHz Wi-Fi / Bluetooth: 2 ranges
  • Public exhibits: user manual, external photos, internal photos, RF exposure, RF test report
Jan 21, 2022

Original Equipment

FCC application

This FCC application appears to be the original authorization package for the device, with the matching grant and public exhibits grouped together.

  • Application ID: A2uBb7dE9WMgBkgKDu7xNg==
  • Equipment class: DTS - digital wireless transmitter
  • FCC rules: Part 15C - low-power wireless rules
  • Bands: 2.4 GHz Wi-Fi / Bluetooth: 2 ranges
  • Public exhibits: user manual, external photos, internal photos, RF exposure, RF test report
Wireless test details

Wireless details from FCC tests

This section summarizes what the FCC test documents say about the device's wireless connections and tested frequency ranges. RF exposure or SAR rows are compliance/safety context, not a speed or range claim.

This filing covers Wi-Fi-style wireless operation, including the shared frequency ranges shown below.

FCC equipment classDTS - digital wireless transmitterThe FCC shorthand for the radio behavior reviewed in this filing.
FCC rule partsPart 15C - low-power wireless rulesThe rule sections cited by the grant or test documents.
Frequency bands2.4 GHz Wi-Fi / Bluetooth: 2 rangesThe radio ranges the FCC filing lists for the device.Source: FCC grant; 2 ranges grouped below
Frequency range2412 - 2462 MHz | 2402 - 2480 MHzSource: RF Exposure Info (6102621) p. 5
SAR12.0 W/kg | 22.2 W/kg | 19.3 W/kg | 0.323 W/kg | 0.337 W/kg | 0.308 W/kgRF exposure/SAR values are FCC compliance checks for radio energy near people, not product performance specs.Source: RF Exposure Info (9104674) p. 2; RF Exposure Info (9104675) p. 2
Public photo exhibits

Public FCC photos

Product photos from public FCC exhibits, formatted for easier browsing. External photos show the enclosure and labels; internal photos show boards, antennas, and other compliance-relevant hardware.

Espressif ESPS3WROOM1 external FCC photo from External Photos p. 1
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 1Source: External Photos p. 1
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 2
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 2Source: External Photos p. 2
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 3
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 3Source: External Photos p. 3
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 4
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 4Source: External Photos p. 4
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 5
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 5Source: External Photos p. 5
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 6
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 6Source: External Photos p. 6
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 7
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 7Source: External Photos p. 7
Espressif ESPS3WROOM1 external FCC photo from External Photos p. 8
External viewEspressif ESPS3WROOM1 external FCC photo from External Photos p. 8Source: External Photos p. 8
Manual shortcuts

Quick troubleshooting

Setup, reset, and status notes from the public manual. Use the official source document for full instructions and safety context.

Public manual

Factory reset

  • 2. Press and hold the top handle button for at least 20 seconds, until the lights flash 5 times to confirm the Factory Reset was successful.
Manual page 19
"2. Press and hold the top handle button for at least 20 seconds, until the lights flash 5 times to confirm the Factory Reset was successful."

Pairing or setup mode

  • Download the Willo app using the QR code on page 16 of the user guide. Once you’ve created an account, the app will guide you step-by- step through pairing your Willo.
Manual page 21
"Download the Willo app using the QR code on page 16 of the user guide. Once you’ve created an account, the app will guide you step-by- step through pairing your Willo."

Setup note

  • Download the Willo app using the QR code on page 16 of the user guide. Once you’ve created an account, the app will guide you step-by- step through pairing your Willo.
Manual page 21
"Download the Willo app using the QR code on page 16 of the user guide. Once you’ve created an account, the app will guide you step-by- step through pairing your Willo."
Users Manual

Batch-approved public quick troubleshooting on 2026-05-02 after stricter OCR/source-evidence gate; only high-confidence passed rows with source-backed useful instructions were approved.

User manual

User manual

Searchable manual text plus skimmable details from the public FCC user manual.

Official FCC source: Users Manual27 pages2.5 MB public file

The public manual includes useful reset, power, placement, and button and port details.

Manual at a glance

  • Reset instructionsp. 3
  • Placement and mountingp. 6
  • Power and chargingp. 8

How do I reset this device?

What’s in the Box............................................................................................4 Get To Know Your Willo BrushBotTM...................................................5 Product Safety.........

Source: Users Manual, page 3

What power or charging details does the manual include?

ENG GET TO KNOW YOUR WILLO BRUSHBOTTM 1.

Source: Users Manual, page 5

Where should this device be placed?

The Willo BrushBotTM Toothbrush has been designed to offer a fully automated brushing experience specifically for children, ensuring they can brush thoroughly and safely.

Source: Users Manual, page 6

What buttons or ports does the manual describe?

FLIP 1 min Willo Smart Sensor If you hear it beep twice, Willo SmartSensor is telling you to hold the handle up for the best clean.

Source: Users Manual, page 14
Reset instructions

What’s in the Box............................................................................................4 Get To Know Your Willo BrushBotTM...................................................5 Product Safety.........

Source: Users Manual, page 3
Placement and mounting

The Willo BrushBotTM Toothbrush has been designed to offer a fully automated brushing experience specifically for children, ensuring they can brush thoroughly and safely.

Source: Users Manual, page 6
ENG

WARNING: To reduce the risk of burns, electrocution, fire, or injury:

  • Use this product only for its intended use as described in this manual.
Source: Users Manual, page 7
Power and charging
  • Ensure contacts on the power adapter are clean and dry while the unit is being charged.
Source: Users Manual, page 8
LET’S START BRUSHING

FLIP 1 min Willo Smart Sensor If you hear it beep twice, Willo SmartSensor is telling you to hold the handle up for the best clean.

Source: Users Manual, page 14
ENG

HANDLE LIGHTS Solid green You’re good to go!

Source: Users Manual, page 15

Manual diagrams

Visual pages and diagrams from the public FCC manual exhibit.

1 visuals
CONNECT TO THE WILLO APP visual from the manual from the FCC user manual
CONNECT TO THE WILLO APP visual from the manualSource: Users Manual, page 16
Open FCC filing source

Official FCC documents

Open the original FCC files used to check the details shown here. Badges separate whether a file is public from whether details from that file appear on this page.

FCC grant

Official FCC grant or authorization record.

Public FCC fileUsed on this page
Source

Users Manual (9104631)

Public user manual or setup guide from the FCC filing.

Public FCC fileUsed on this page
FCC type: Users ManualApplication ID: xhsUVYWT5KURcCkyU/d7ag==
Source

Internal Photos (6102620)

Internal product photo exhibit from the FCC filing.

Public FCC fileUsed on this page
FCC type: Internal PhotosApplication ID: mQVd+EBrIVV6cijuR70Nzg==
Source

External Photos (6102617)

External product photo exhibit from the FCC filing.

Public FCC fileUsed on this page
FCC type: External PhotosApplication ID: mQVd+EBrIVV6cijuR70Nzg==
Source

RF Exposure Info (9104674)

RF exposure exhibit from the FCC filing.

Public FCC fileUsed on this page
FCC type: RF Exposure InfoApplication ID: xhsUVYWT5KURcCkyU/d7ag==
Source

59 additional official FCC documents

Additional FCC exhibits are grouped here by source type instead of repeated as individual rows.

Source index
1 grant record4 manuals or setup guides3 internal photo exhibits3 external photo exhibits8 RF exposure exhibits10 RF report exhibits30 test report exhibits