AtomS3R-Ext

SKU:C126-Ext

Description

AtomS3R-Ext is a programmable controller based on the ESP32-S3 main control, designed for prototype development and extension. It features a universal expansion board on top, allowing users to connect and debug multiple IO ports, suitable for expanding and verifying various peripheral modules. It integrates the ESP32-S3-PICO-1-N8R8 main control, supports Wi-Fi functionality, and includes 8 MB of on-chip Flash and 8 MB of PSRAM, along with a power circuit converting 5V to 3.3V/2.8V/1.2V. It has a built-in three-axis BMM150 geomagnetic sensor and a six-axis BMI270 attitude sensor. The controller is equipped with a USB Type-C interface for power supply and firmware download, and features a HY2.0-4P expansion port, six GPIO and power pins for easy function expansion. Compared to previous ATOM series host products, the 3D antenna of AtomS3R-Ext has been enhanced, providing better signal performance and stability. With dimensions of only 24.0 x 24.0 x 12.0mm, it is ideal for prototype development and verification applications in embedded smart devices.

Features

Integrated ESP32-S3-PICO-1-N8R8 main control
Nine-axis sensor system (BMI270 six-axis + BMM150 three-axis geomagnetic sensor)
8MB Flash and 8MB PSRAM
Supports infrared transmission control function
Expandable pins and interfaces
Breadboard
Development Platform
- Arduino IDE
- ESP-IDF
- PlatformIO

Learn

BMM150 Magnetic Field Interference

Products with magnets may interfere with the BMM150 magnetic field sensor, causing abnormal readings. When used with an M5 master control device containing a magnet, the magnet needs to be removed, and at the same time, the BMM150 sensor should be kept away from strong magnetic fields.

Includes

1 x AtomS3R-Ext

Applications

Motion detection and orientation awareness
Smart device control
IoT applications

Specifications

Specification	Parameter
SoC	ESP32-S3-PICO-1-N8R8@Dual-core Xtensa LX7, up to 240MHz
USB	USB OTG, USB Serial/JTAG
Flash	8MB
PSRAM	8MB
Wi-Fi	2.4 GHz Wi-Fi
6-axis Attitude Sensor (BMI270)	Accuracy: 0.05% (acceleration), 0.05°/s (angular velocity) I2C @0x68
3-axis Geomagnetic Sensor (BMM150)	Accuracy: 0.3 μT Mounted on BMI270, magnetic data is obtained through BMI270
Infrared IR	Infrared emission distance: 12.46m at ∠180° (unobstructed)
Sleep Current	GPIO-5V power: DC 5V@11.63 uA Grove-5V power: DC 5V@10.75 uA USB-5V power: DC 5V@92.50 uA (including PD resistor loss)
Universal Expansion Board Spec	5 x 6@2.54mm
Bottom Reserved GPIO	G5/G6/G7/G8/G38/G39
Proto Board Reserved GPIO	G3/G4/G9/G10/G11/G12/G13/G14/G17/G21/G40/G42/G46/G48
Operating Temperature	0 ~ 40°C
Product Size	24.0 x 24.0 x 12.0mm
Product Weight	7.0g
Package Size	85.0 x 65.0 x 15.2mm
Gross Weight	13.6g

Learn

Download Mode

To burn firmware, press and hold the reset button (about 2 seconds) until the internal green LED lights up, then release. The device is now in download mode, ready for burning.

Schematics

1/2

PinMap

BMI270 & IR & BUTTON

ESP32-S3-PICO-1-N8R8	G0	G45	G47	G41
BMI270	SYS_SCL	SYS_SDA
IR			IR_LED_DRV
BUTTON				USER_BUT

BMM150

BMI270	BMI270_ASDx	BMI270_ASCx
BMM150	A_SDA	A_SCL

BMM150 Mounted on BMI270

Integrating BMM150 via BMI270’s Sensor Hub auxiliary I2C interface for unified 9‑axis sensor data collection

Proto Pin

Proto Board	ESP32-S3-PICO-1-N8R8
1	3.3V
2	1.2V
3	2.8V
4	RST
5	G3
6	G4
7	G9
8	G10
9	G11
10	G12
11	G13
12	G17
13	G21
14	G40
15	G42
16	G46
17	G48
18	GND
19	GND

HY2.0-4P

HY2.0-4P	Black	Red	Yellow	White
PORT.CUSTOM	GND	5V	G2	G1

Model Size

PCB

AtomS3R-Ext Proto Board PCB

Datasheets

Softwares

AtomS3R-Ext Arduino Library

PlatformIO

[env:m5stack-atoms3r]
platform = espressif32@6.7.0
board = esp32-s3-devkitc-1
framework = arduino
board_build.arduino.memory_type = qio_opi
build_flags =
    -DESP32S3
    -DBOARD_HAS_PSRAM
    -mfix-esp32-psram-cache-issue
    -DCORE_DEBUG_LEVEL=5
    -DARDUINO_USB_CDC_ON_BOOT=1
    -DARDUINO_USB_MODE=1
lib_deps =
    M5Unified=https://github.com/m5stack/M5Unified

Video

AtomS3R-Ext Product Introduction and Case Demonstration

Product Comparison

To compare information on the Atom series products, you can visit the Product Selection Table, check the target products, and get the comparison results. The selection table covers key information such as core parameters and functional features, and supports comparison of multiple products simultaneously.