UM TinyS2

Development Board TINYS2

UM TinyS2 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.

240 MHz CPU 4MB Flash WiFi

About UM TinyS2

ESP32S2 Xtensa single-core 32-bit LX7 · 240 MHz

Ultra-compact ESP32-S2 board with 4MB Flash, 2MB PSRAM, and USB-C - optimized for low-power, space-constrained projects.

Technical Specifications

Complete technical specification details for UM TinyS2

ESP32S2 · Single-Core

Arch

XTENSA

Clock

240 MHz

Flash

4MB

Connectivity

WiFi

802.11 b/g/n 2.4 GHz

Digital IO

Analog In

PWM

Interrupts

Full datasheet & reference manual

Download

Quick Setup

Copy-paste configs for UM TinyS2 - auto‑generated from this board's exact hardware specs.

ESP32S2 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Tinys2 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) Tinys2

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 "Tinys2" for the UM TinyS2.

platformio.ini


[env:tinys2]
platform  = espressif32
board     = esp32-s2-saola-1
framework = arduino

; Exact hardware config for UM TinyS2
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"

# UM TinyS2 - 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

UM TinyS2 Pinout Diagram

Complete pin reference for UM TinyS2

Useful Links

Datasheets and resources for UM TinyS2

Board Datasheet

Technical specifications

ESP32S2 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for UM TinyS2

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

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

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 UM TinyS2

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)

Configuration Summary

The UM TinyS2 uses esptool_py for uploads , esp_ota for OTA updates, and esptool_py bootloader at 0x1000.

Flash mode: dio | Boot mode: qio

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

Similar Boards

Other development boards with ESP32S2 microcontroller

ESP32S2 Dev Module

ESP32S2 XTENSA

ESP32S2 Dev Module development board is based on esp32s2 microcontroller and uses xtensa architecture.

View Board Details

Franzininho WiFi MSC

ESP32S2 XTENSA

Franzininho WiFi MSC development board is based on esp32s2 microcontroller and uses xtensa architecture.

View Board Details

LOLIN S2 Mini

ESP32S2 XTENSA

LOLIN S2 Mini development board is based on esp32s2 microcontroller and uses xtensa architecture.

View Board Details

UM TinyS2

About UM TinyS2

Technical Specifications

Quick Setup

UM TinyS2 Pinout Diagram

Useful Links

Pin Mappings

Default Tools & Configuration

Similar Boards

ESP32S2 Dev Module

Franzininho WiFi MSC

LOLIN S2 Mini

Contents