FCC ID: 2AN3WM5ATOMU M5AtomU

AtomU 2021 CONTENTS 1. OUTLINE ............................................................................................................................. 3 1.1. ESP32 PICO ................................................................................................................................ 3 2. SPECIFICATIONS ............................................................................................................. 5 3. QUICK START .................................................................................................................... 6 3.1. ARDUINO IDE ............................................................................................................................ 6 3.2. BLUETOOTH SERIAL ....................................................................................................................... 6 3.3. WIFI SCANNING ............................................................................................................................ 8 1. OUTLINE AtomU is a very small and flexible IoT speech recognition development board, using Espressif's `ESP32` main control chip, equipped with two low-power `Xtensa 32-bit LX6` microprocessors, main frequency Up to `240MHz`. It has the characteristics of compact size, strong performance and low power consumption. Integrated USB-A interface, plug and play, easy to upload, download and debug the program. Integrated

`Wi-Fi` and `Bluetooth` modules, with built-in digital microphone SPM1423 (I2S), can achieve clear audio recording, suitable for various IoT human-computer interaction, voice input recognition scenarios (STT) 1.1. ESP32 PICO The ESP32-PICO-D4 is a System-in-Package (SiP) module that is based on ESP32, providing complete Wi-Fi and Bluetooth functionalities. The module has a size as small as (7.0000.100) mm (7.0000.100) mm (0.9400.100) mm, thus requiring minimal PCB area. The module integrates a 4-MB SPI flash. At the core of this module is the ESP32 chip*, which is a single 2.4 GHz Wi-Fi and Bluetooth combo chip designed with TSMCs 40 nm ultra-low power technology. ESP32-PICO-D4 integrates all peripheral components seamlessly, including a crystal oscillator, flash, filter capacitors and RF matching links in one single package. Given that no other peripheral components are involved, module welding and testing is not required either. As such, ESP32-PICO-D4 reduces the complexity of supply chain and improves control efficiency. With its ultra-small size, robust performance and low-energy consumption, ESP32-

PICO-D4 is well suited for any space-limited or battery-operated applications, such as wearable electronics, medical equipment, sensors and other IoT products. 2. SPECIFICATIONS Resources Parameter 240MHz dual core, 600 DMIPS, 520KB SRAM, 2.4GHz ESP32-PICO-D4 Wi-Fi, dual mode Bluetooth Flash 4MB Input voltage 5V @ 500mA button Programmable buttons x 1 Programmable RGB LED SK6812 x 1 Antenna 2.4GHz 3D Antenna Operating temperature 32F to 104F ( 0C to 40C ) 3. QUICK START 3.1. ARDUINO IDE Visit Arduino's official website(https://www.arduino.cc/en/Main/Software),Select the installation package for your own operating system to download.

>1.Open up Arduino IDE, navigate to `File`->`Peferences`->`Settings`

>2.Copy the following M5Stack Boards Manager url to `Additional Boards Manager URLs:`

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-

pages/package_esp32_dev_index.json

>3.Navigate to `Tools`->`Board:`->`Boards Manager...`

>4.Search `ESP32` in the pop-up window, find it and click `Install`

>5.select `Tools`->`Board:`->`ESP32-Arduino-ESP32 DEV Module

>6Please install FTDI driver before use: https://docs.m5stack.com/en/download 3.2. BLUETOOTH SERIAL Open the Arduino IDE and open the example program

`File`->`Examples`->`BluetoothSerial`->`SerialToSerialBT`. Connect the device to the computer and select the corresponding port to burn. After completion, the device will automatically run Bluetooth, and the device name is `ESP32test`. At this time, use the Bluetooth serial port sending tool on the PC to realize the transparent transmission of Bluetooth serial data.

#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)

#error Bluetooth is not enabled! Please run `make menuconfig` to and en able it

#endif BluetoothSerial SerialBT;

void setup() {

Serial.begin(115200);

SerialBT.begin("ESP32test"); //Bluetooth device name Serial.println("The device started, now you can pair it with bluetoot h!");

void loop() {

if (Serial.available()) {

SerialBT.write(Serial.read());

if (SerialBT.available()) {

Serial.write(SerialBT.read());

delay(20);

3.3. WIFI SCANNING Open the Arduino IDE and open the example program `File`->`Examples`->`WiFi`->`WiFiScan`. Connect the device to the computer and select the corresponding port to burn. After completion, the device will automatically run the WiFi scan, and the current WiFi scan result can be obtained through the serial port monitor that comes with the Arduino.

// Set WiFi to station mode and disconnect from an AP if it was pre

#include "WiFi.h"

void setup()

Serial.begin(115200);

viously connected WiFi.mode(WIFI_STA);

WiFi.disconnect();

delay(100);

Serial.println("Setup done");

void loop()

Serial.println("scan start");

// WiFi.scanNetworks will return the number of networks found int n = WiFi.scanNetworks();

Serial.println("scan done");

if (n == 0) {

Serial.println("no networks found");

} else {

Serial.print(n);

Serial.println(" networks found");

for (int i = 0; i < n; ++i) {

// Print SSID and RSSI for each network found Serial.print(i + 1);

Serial.print(": ");

Serial.print(WiFi.SSID(i));

Serial.print(" (");

Serial.print(WiFi.RSSI(i));

Serial.print(")");

Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?"

delay(10);

Serial.println("");

// Wait a bit before scanning again delay(5000);

Federal Communications Commission (FCC) Statement You are cautioned that changes or modifications not expressly approved by the part responsible for compliance could void the users authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 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 or more 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. 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 of the device. FCC RF Radiation Exposure Statement:

The product comply with the FCC portable RF exposure limit set forth for an uncontrolled environment and are safe for intended operation as described in this manual. The further RF exposure reduction can be achieved if the product can be kept as far as possible from the user body.

OSs ESP32-PICO oie! Name. MsarOM Pad

FCC ID: 2AN3WM5ATOMU 5V Ext. eS Pins TY 211-211203 FE CE XK GND eas

Company Name:MS5Stack Technology Co.,Ltd Add: 106,1st Floor,Building 1,Bright Technology Park 88 Zhuguang North Road,XiliTaoyuan Street, Nanshan District, Shenzhen,Guangdong,China Tel: 13509230623 Fax: 0755-69815195 E-mail: JimmyLai@M5Stack.com DECLARATION Date: 2022-02-16 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 We, MSStack Technology Co.,Ltd hereby declare that product name:MSAtomU(FCC ID:

2AN3WMSATOMU, model name AtomU,BoksLINK) are electrically identical with the PCB design, components and electromagnetic compatibility characteristics, and model:AtomU have been tested by BACL(New Taipei Laboratory). The differences of them are as follows:

1.The model name;

2.On the basis of the main model,the series models reduce JP1 and J1 interfaces. Please contact me if there is need for any additional clarification or information. Best Regards, Signature: | ve | OY Print Name: Jimmy Lai Title:CEO

Company:MS5Stack Technology Co.,Ltd Add: 106,1st Floor,Building 1,Bright Technology Park 88 Zhuguang North Road, XiliTaoyuan Street, Nanshan District, Shenzhen,Guangdong,China Tel: 13509230623 Fax: 0755-698 15195 E-mail: JimmyLai@M5Stack.com FCC Confidential Authorization Date: 2022-02-16 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AN3WM5ATOMU In accordance with Sections 0.457 and 0.459 of the Commissions Rules, M5Stack Technology Co.,Ltd hereby requests long-term confidential treatment of information accompanying this application as outlined below:

e Block Diagram e Schematics e Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, SS =

Signature: <The ln \

Print Name: Jimmy Lai Title: CEO QA-FR-171-A

Company:M5Stack Technology Co.,Ltd Add: 106, 1st Floor,Building 1,Bright Technology Park 88 Zhuguang North Road, XiliTaoyuan Street, Nanshan District, Shenzhen,Guangdong,China Tel: 13509230623 Fax: 0755-69815195 E-mail: JimmyLai@M5Stack.com FCC Authorization Date: 2022-02-16 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We , MS5Stack Technology Co.,Ltd, Hereby authorizes Bay Area Compliance Laboratories Corporation(New Taipei Laboratory) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratory Corporation(New Taipei Laboratory) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, ZW. SsC. $62) This authorization is valid until further written notice from the applicant. Sincerely Yours,

) ah nin Signature:

Print Name: Jimmy Lai Title: CEO QA-FR-170-B