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M5Stack-ATOM image

M5Stack-ATOM

Development Board

Code name: M5Stack_ATOM
ESP32 M5STACK

M5Stack-ATOM is a development board based on the ESP32 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 4MB flash memory.

About M5Stack-ATOM

Ultra-compact ESP32 board with RGB LED and button - ideal for simple wireless triggers and automation nodes.

📋 Technical Specifications

Complete technical specification details for M5Stack-ATOM

🛰️ Connectivity

WiFi 802.11 b/g/n (2.4 GHz)
Bluetooth 4.2
BLE 4.2

🧠 Microcontroller

Model esp32
Clock Speed 240 MHz
Flash Size 4MB
Architecture xtensa

✨ Features & Pins

Digital IO 40
Analog Input 16
PWM 14
Interrupts 16
Download Full Datasheet

M5Stack-ATOM Pinout Diagram

Complete pin reference for M5Stack-ATOM

M5Stack-ATOM pinout

Pin Mappings

Complete pinout and GPIO mapping for M5Stack-ATOM

40
Digital I/O Pins
16
Interrupt Pins
16
Analog Inputs
14
PWM Pins
PinAnalogTouchPWMOther
0G0
1PWMTX
3PWMRX
9PWMG9
10PWMG10
12PWMG12
19PWMG19 SS
21PWMG21
22PWMG22 SCK
23PWMG23 MISO
25PWMG25 DAC1
26PWMRXD2 SDA G26 DAC2
27PWMG27
32PWMTXD2 SCL G32
33PWMG33 MOSI
35ADC1
36G36 ADC2
37G37
39G39
Legend
A0 Analog input
T0 Touch sensor
PWM PWM capable
RX/TX Serial pins
LED Built-in LED
# Pin number

Default Tools & Configuration

Build and upload settings for M5Stack-ATOM

SettingValue
Bootloader toolesptool_py
Uploader toolesptool_py
Network uploader toolesp_ota
Bootloader address0x1000
Flash modedio
Boot modedio
Maximum upload size
1280 KB (1310720 bytes)
Maximum data size
320 KB (327680 bytes)
Configuration Summary

The M5Stack-ATOM uses esptool_py for uploads , esp_ota for OTA updates, and esptool_py bootloader at 0x1000.

Flash mode: dio | Boot mode: dio

Max sketch size: 1280 KB | Max data size: 320 KB