Adafruit QT Py ESP32-S2

Development Board

Code name: ADAFRUIT_QTPY_ESP32S2

ESP32S2 ADAFRUIT

Adafruit QT Py 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 QT Py ESP32-S2

Tiny ESP32-S2 board with STEMMA QT and USB-C - ideal for compact, plug-and-play IoT applications.

Technical Specifications

Complete technical specification details for Adafruit QT Py 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 17

Interrupts 46

Download Full Datasheet

Quick Setup

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

ESP32S2 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Adafruit Qtpy 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) Adafruit Qtpy 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 "Adafruit Qtpy Esp32s2" for the Adafruit QT Py ESP32-S2.

platformio.ini


[env:adafruit_qtpy_esp32s2]
platform  = espressif32
board     = esp32-s2-saola-1
framework = arduino

; Exact hardware config for Adafruit QT Py 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 QT Py 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 QT Py ESP32-S2 Pinout Diagram

Complete pin reference for Adafruit QT Py ESP32-S2

Useful Links

Datasheets and resources for Adafruit QT Py ESP32-S2

Board Datasheet

Technical specifications

ESP32S2 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Adafruit QT Py ESP32-S2

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
1			PWM	NEOPIXEL_NUM WIRE1_PIN_DEFINED
5	A6	T5	PWM	TX
6	A5	T6	PWM	SCL
7	A4	T7	PWM	SDA
8	A3	T8	PWM
9	A2	T9	PWM
16	A7		PWM	RX
17	A1		PWM	DAC1
18	A0		PWM	DAC2
35			PWM	MOSI
36			PWM	SCK
37			PWM	MISO
38			PWM	NEOPIXEL_POWER
39			PWM
40			PWM	SCL1
41			PWM	SDA1
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 QT Py 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)