Atom-Lite

Board
by M5Stackm5atom-lite≈ cheap (under ~$15)

Also known as: m5stack_atom

Verify my boardCompareEdit on GitHub
Flash this board — 3 firmware options · Unverified
Atom-Lite board
Board
Atom-Lite pinout
Pinout

Specifications

Radiosinherited from ESP32

Wi-Fi
Wi-Fi 4 · 2.4 GHz
Bluetooth LE
BLE 4.2
Bluetooth Classic
yes
802.15.4
no

USB

Native USB
no
Connector
usb-c

Board

Form factor
m5-atom
Dimensions
24 × 24 × 9.5 mm

Display & extras

Extras
rgb-led
Built onAtom-Lite BoardESP32 SoC

24x24mm ESP32-PICO atom unit: programmable RGB LED, IR transmitter, Grove port, USB-C.

Firmware for this board

Unverified

  • ESP32-HomeKit-RemoteUnverifiedmulti
    Flash ESP32-HomeKit-Remoteguided

    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.

  • ESP32-R4sGate-for-RedmondUnverifiedmulti
    Flash ESP32-R4sGate-for-Redmondguided

    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.

  • Core2AppSuiteUnverifiedmulti
    Flash Core2AppSuiteguided

    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.

Notes

  • ESP32-PICO-D4; 4 MB flash
  • SK6812 3535 programmable RGB LED, IR transmitter, customizable button, 2.4G 3D antenna, Grove/HY2.0 expansion, no onboard battery
  • ESP32-PICO-D4 is a SiP module with only in-package flash; it has no integrated PSRAM (only pins to attach external PSRAM, unused here)
  • io.gpio_exposed=6 QUOTED: vendor Specifications table states "PIN Interface: G19, G21, G22, G23, G25, G33"
  • io.gpio_free=6 DERIVED, not quoted (SPEC-io-power.md §5.3). Exposed pads {G19,G21,G22,G23,G25,G33} (6, quoted from vendor PIN Interface spec row). Subtracting esp32's soc.reserved_pins that are exposed -- strapping {0,2,5,12,15} (0 exposed), input_only {34,35,36,39} (0 exposed), usb_flash_tied {6,7,8,9,10,11} (0 exposed) -- gives 6 - 0 - 0 - 0 = 6.

Verify my board

Reads the connected chip over USB and checks it against what esp-atlas cites for Atom-Lite — 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.