AtomS3

Board
by M5Stackm5atoms3≈ cheap (under ~$15)

Also known as: m5stack_atoms3

Verify my boardCompareEdit on GitHub
Flash this board — 5 firmware options · Unverified
AtomS3 board
Board
AtomS3 pinout
Pinout

Specifications

Radiosinherited from ESP32-S3

Wi-Fi
Wi-Fi 4 · 2.4 GHz
Bluetooth LE
BLE 5
Bluetooth Classic
no
802.15.4
no

USB

Native USB
yes
Connector
usb-c

Board

Form factor
m5-atom
Dimensions
24 × 24 × 12.9 mm

Display & extras

Display
0.85in 128x128 IPS SPI
Extras
imu
Built onAtomS3 BoardESP32-S3 SoC

24x24mm ESP32-S3 atom unit: 0.85in IPS display, IMU, IR transmitter, USB-C.

Firmware for this board

Unverified

  • Atom S3R Smartwatch UI LVGLUnverifiedmulti
    Flash Atom S3R Smartwatch UI LVGLguided

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

  • Evil-M5ProjectUnverifiedpentest
    Flash Evil-M5Projectguided

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

  • M5Stack-avatar-mic-cores3Unverifiedmulti
    Flash M5Stack-avatar-mic-cores3guided

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

  • OpenMQTTGatewayUnverifiedhome
    Flash OpenMQTTGatewayguided

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

other

  • Palnagotchideclaredpentest
    Flash Palnagotchiguided

    declared esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

Notes

  • ESP32-S3FN8; 8 MB flash, no PSRAM
  • MPU6886 6-axis IMU (I2C 0x68), programmable button below screen, IR transmitter, HY2.0-4P expansion port, no onboard battery
  • io.gpio_exposed=8 COUNTED (page has no single "IO x N" summary line): bottom header states "The bottom reserves 6 GPIO and power pins" listing G5/G6/G7/G8/G38/G39, plus the separate HY2.0-4P expansion port pinout "Yellow: G2, White: G1" -- pad set {1,2,5,6,7,8,38,39} = 8. io.gpio_free=8 DERIVED: subtracting esp32-s3's soc.reserved_pins (strapping {0,3,45,46}, usb_flash_tied {19,20,35,36,37}) -- none of the 8 exposed pads fall in either set -- gives 8 - 0 = 8. G38/G39 also carry the onboard MPU6886 I2C bus (shared, multi-drop) but are not subtracted since I2C sharing doesn't consume the pad exclusively; no display/PSRAM pins overlap the exposed set (display uses G21/G17/G15/G33/G34/G16, psram_mb=0). No max Grove/rail output current stated on this page, so power_out is omitted.

Verify my board

Reads the connected chip over USB and checks it against what esp-atlas cites for AtomS3 — over Web Serial, no backend, nothing leaves your browser.

In-browser verify needs Web Serial: Chrome or Edge on a desktop. Safari, Firefox and phones cannot do it.

Serial monitor

Not connected.