Adafruit Feather ESP32-S3 2MB PSRAM

Development Board ADAFRUIT_FEATHER_ESP32S3

Adafruit Feather ESP32-S3 2MB PSRAM is a development board based on the ESP32S3 microcontroller using XTENSA architecture.

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

240 MHz CPU 4MB Flash WiFi + BT 5.0

About Adafruit Feather ESP32-S3 2MB PSRAM

ESP32S3 Xtensa dual-core 32-bit LX7 · 240 MHz

A Feather-format board with 4MB Flash and 2MB PSRAM, featuring STEMMA QT connector and USB-C, suitable for low-power applications.

Technical Specifications

Complete technical specification details for Adafruit Feather ESP32-S3 2MB PSRAM

ESP32S3 · Dual-Core + AI

Arch

XTENSA

Clock

240 MHz

Flash

4MB

Connectivity

WiFi

802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

Classic + BLE

Digital IO

Analog In

PWM

Interrupts

Full datasheet & reference manual

Download

Quick Setup

Copy-paste configs for Adafruit Feather ESP32-S3 2MB PSRAM - auto‑generated from this board's exact hardware specs.

ESP32S3 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Adafruit Feather Esp32s3 from the esp32 by Espressif package. In PlatformIO use board = esp32-s3-devkitm-1. ESP32S3 · 240 MHz · 4MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Adafruit Feather Esp32s3

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 "Adafruit Feather Esp32s3" for the Adafruit Feather ESP32-S3 2MB PSRAM.

platformio.ini


[env:adafruit_feather_esp32s3]
platform  = espressif32
board     = esp32-s3-devkitm-1
framework = arduino

; Exact hardware config for Adafruit Feather ESP32-S3 2MB PSRAM
board_build.mcu        = esp32s3
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-s3-devkitc-1
  framework:
    type: arduino   # or "esp-idf"

# Adafruit Feather ESP32-S3 2MB PSRAM - 240 MHz ESP32S3
# 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 esp32s3 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 4MB \
    0x0 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x0

Adafruit Feather ESP32-S3 2MB PSRAM Pinout Diagram

Complete pin reference for Adafruit Feather ESP32-S3 2MB PSRAM

Useful Links

Datasheets and resources for Adafruit Feather ESP32-S3 2MB PSRAM

Board Datasheet

Technical specifications

ESP32S3 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Adafruit Feather ESP32-S3 2MB PSRAM

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
1			PWM	NEOPIXEL_NUM
3	A6	T3	PWM	SDA
4	A7	T4	PWM	SCL
5	A8	T5	PWM
6	A9	T6	PWM
7			PWM	I2C_POWER
8	A5	T8	PWM
9	A10	T9	PWM
10	A11	T10	PWM
11	A12	T11	PWM
12	A13	T12	PWM
13	A14	T13	PWM	LED_BUILTIN
14	A4	T14	PWM
15	A3		PWM
16	A2		PWM
17	A1		PWM
18	A0		PWM
21			PWM	NEOPIXEL_POWER
33			PWM
35			PWM	MOSI
36			PWM	SCK
37			PWM	MISO
38			PWM	RX
39			PWM	TX
42			PWM	SS

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 Feather ESP32-S3 2MB PSRAM

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x0`
Flash mode	dio
Boot mode	qio
PSRAM type	qspi
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)

Configuration Summary

The Adafruit Feather ESP32-S3 2MB PSRAM uses esptool_py for uploads , esp_ota for OTA updates, and esptool_py bootloader at 0x0.

Flash mode: dio | Boot mode: qio | PSRAM: qspi

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

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Adafruit Feather ESP32-S3 2MB PSRAM

About Adafruit Feather ESP32-S3 2MB PSRAM

Technical Specifications

Quick Setup

Adafruit Feather ESP32-S3 2MB PSRAM Pinout Diagram

Useful Links

Pin Mappings

Default Tools & Configuration

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Contents