UM FeatherS2

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Development Board

Code name: FEATHERS2

ESP32S2

UM FeatherS2 is a development board based on the ESP32S2 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 16MB flash memory.

About UM FeatherS2

Feature-rich ESP32-S2 Feather board with 16MB Flash, 8MB PSRAM, and LiPo charging - great for advanced IoT projects.

Technical Specifications

Complete technical specification details for UM FeatherS2

Connectivity

WiFi 802.11 b/g/n 2.4 GHz

Bluetooth -

BLE -

Microcontroller

Model esp32s2

Clock Speed 240 MHz

Flash Size 16MB

Architecture xtensa

✨ Features & Pins

Digital IO 48

Analog Input 20

PWM 29

Interrupts 46

Quick Setup

Copy-paste configs for UM FeatherS2 - auto‑generated from this board’s exact hardware specs.

ESP32S2 240 MHz 16MB DIO Xtensa

In Arduino IDE 2 select Feathers2 from the esp32 by Espressif package. In PlatformIO use board = esp32-s2-saola-1. ESP32S2 · 240 MHz · 16MB · DIO.

Arduino IDE PlatformIO ESPHome esptool

Tools menu settings Copy

Board (select in Arduino IDE) Feathers2

CPU Frequency 240 MHz

Flash Size 16MB

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 “Feathers2” for the UM FeatherS2.

platformio.ini Copy

[env:feathers2]
platform  = espressif32
board     = esp32-s2-saola-1
framework = arduino

; Exact hardware config for UM FeatherS2
board_build.mcu        = esp32s2
board_build.f_cpu      = 240000000L
board_build.flash_size = 16MB
board_build.flash_mode = dio
board_upload.flash_size = 16MB

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

esp32: block (YAML) Copy

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

# UM FeatherS2 - 240 MHz ESP32S2
# Flash: 16MB | USB: N/A

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

esptool.py - flash command Copy

esptool.py \
  --chip esp32s2 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 16MB \
    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

Useful Links

Datasheets and resources for UM FeatherS2

[

ESP32S2 Datasheet

Microcontroller reference

](https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf)

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