Adafruit QT Py ESP32-C3

Development Board

Code name: ADAFRUIT_QTPY_ESP32C3

ESP32C3 ADAFRUIT

Adafruit QT Py ESP32-C3 is a development board based on the ESP32C3 microcontroller using RISCV32 architecture.

This board features a maximum CPU frequency of 160 MHz and 4MB flash memory.

About Adafruit QT Py ESP32-C3

Small ESP32-C3 board with STEMMA QT - perfect for plug-and-play sensor projects and low-power wireless apps.

Technical Specifications

Complete technical specification details for Adafruit QT Py ESP32-C3

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32c3

Clock Speed 160 MHz

Flash Size 4MB

Architecture riscv32

✨ Features & Pins

Digital IO 22

Analog Input 6

Interrupts 22

Download Full Datasheet

Quick Setup

Copy-paste configs for Adafruit QT Py ESP32-C3 - auto‑generated from this board's exact hardware specs.

ESP32C3 160 MHz 4MB DIO RISC-V

In Arduino IDE 2 select Adafruit Qtpy Esp32c3 from the esp32 by Espressif package. In PlatformIO use board = esp32-c3-devkitm-1. ESP32C3 · 160 MHz · 4MB · DIO · RISC-V.

Tools menu settings

Board (select in Arduino IDE) Adafruit Qtpy Esp32c3

CPU Frequency 160 MHz

Flash Size 4MB

Flash Mode DIO

Upload Speed 921600

Architecture RISC-V

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Adafruit Qtpy Esp32c3" for the Adafruit QT Py ESP32-C3.

platformio.ini


[env:adafruit_qtpy_esp32c3]
platform  = espressif32
board     = esp32-c3-devkitm-1
framework = arduino

; Exact hardware config for Adafruit QT Py ESP32-C3
board_build.mcu        = esp32c3
board_build.f_cpu      = 160000000L
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-c3-devkitm-1
  framework:
    type: arduino   # or "esp-idf"

# Adafruit QT Py ESP32-C3 - 160 MHz ESP32C3
# 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 esp32c3 \
  --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 QT Py ESP32-C3 Pinout Diagram

Complete pin reference for Adafruit QT Py ESP32-C3

Useful Links

Datasheets and resources for Adafruit QT Py ESP32-C3

Board Datasheet

Technical specifications

ESP32C3 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Adafruit QT Py ESP32-C3

Digital I/O Pins

Interrupt Pins

Analog Inputs

Pin	Analog	Other
0	A3
1	A2
2
3	A1
4	A0
5	A4	SDA
6		SCL SS
7		MOSI
8		MISO
9		BUTTON
10		SCK
20		RX
21		TX

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-C3

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