Adafruit Metro ESP32-S2

Development Board

Code name: METRO_ESP32S2

ESP32S2 ADAFRUIT

Adafruit Metro ESP32-S2 is a development board based on the ESP32S2 microcontroller using XTENSA architecture.

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

About Adafruit Metro ESP32-S2

Full-size ESP32-S2 dev board with USB-C and STEMMA QT - great for breadboarding and secure applications.

Technical Specifications

Complete technical specification details for Adafruit Metro ESP32-S2

Connectivity

WiFi 802.11 b/g/n 2.4 GHz

Bluetooth -

BLE -

Microcontroller

Model esp32s2

Clock Speed 240 MHz

Flash Size 4MB

Architecture xtensa

✨ Features & Pins

Digital IO 48

Analog Input 20

PWM 27

Interrupts 46

Download Full Datasheet

Quick Setup

Copy-paste configs for Adafruit Metro ESP32-S2 - auto‑generated from this board's exact hardware specs.

ESP32S2 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Metro Esp32s2 from the esp32 by Espressif package. In PlatformIO use board = esp32-s2-saola-1. ESP32S2 · 240 MHz · 4MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Metro Esp32s2

CPU Frequency 240 MHz

Flash Size 4MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Metro Esp32s2" for the Adafruit Metro ESP32-S2.

platformio.ini


[env:adafruit_metro_esp32s2]
platform  = espressif32
board     = esp32-s2-saola-1
framework = arduino

; Exact hardware config for Adafruit Metro ESP32-S2
board_build.mcu        = esp32s2
board_build.f_cpu      = 240000000L
board_build.flash_size = 4MB
board_build.flash_mode = dio
board_upload.flash_size = 4MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32-s2-saola-1
  framework:
    type: arduino   # or "esp-idf"

# Adafruit Metro ESP32-S2 - 240 MHz ESP32S2
# Flash: 4MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32s2 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 4MB \
    0x1000 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x1000

Adafruit Metro ESP32-S2 Pinout Diagram

Complete pin reference for Adafruit Metro ESP32-S2

Useful Links

Datasheets and resources for Adafruit Metro ESP32-S2

Board Datasheet

Technical specifications

ESP32S2 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Adafruit Metro ESP32-S2

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
0
1	A2	T1	PWM	NEOPIXEL_NUM
2	A3	T2	PWM
3	A4	T3	PWM
4	A5	T4	PWM
5	A6	T5	PWM	TX
6	A7	T6	PWM	RX
7	A8	T7	PWM
8	A9	T8	PWM
9	A10	T9	PWM
10	A11	T10	PWM
11	A12	T11	PWM
12	A13	T12	PWM
13	A14	T13	PWM
14	A15	T14	PWM
15	A16		PWM
16	A17		PWM
17	A0		PWM	DAC1
18	A1		PWM	DAC2
19	A18		PWM
20	A19		PWM
33			PWM	SDA
34			PWM	SCL
35			PWM	MOSI
36			PWM	SCK
37			PWM	MISO
42			PWM	LED_BUILTIN SS
45			PWM

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 Adafruit Metro ESP32-S2

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	qio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)