Espressif ESP32-S3-USB-Bridge

Development Board

Code name: ESP32_S3_USB_BRIDGE

Espressif ESP32-S3-USB-Bridge 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.

About Espressif ESP32-S3-USB-Bridge

The ESP32-S3-USB-Bridge is a compact development board based on the ESP32-S3-MINI-1 module. It serves as an alternative to traditional USB-to-UART chips by establishing a bridge between a computer and existing microcontrollers. The board supports multiple functions, including USB-to-UART bridging, JTAG debugging, and acts as a USB composite device supporting various functionalities.

Technical Specifications

Complete technical specification details for Espressif ESP32-S3-USB-Bridge

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32s3

Clock Speed 240 MHz

Flash Size 4MB

Architecture xtensa

✨ Features & Pins

Digital IO 12

Analog Input 6

PWM 6

Interrupts 16

Download Full Datasheet

Quick Setup

Copy-paste configs for Espressif ESP32-S3-USB-Bridge - auto‑generated from this board's exact hardware specs.

ESP32S3 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Esp32 S3 Usb Bridge 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) Esp32 S3 Usb Bridge

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 "Esp32 S3 Usb Bridge" for the Espressif ESP32-S3-USB-Bridge.

platformio.ini


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

; Exact hardware config for Espressif ESP32-S3-USB-Bridge
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"

# Espressif ESP32-S3-USB-Bridge - 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 \
    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

Espressif ESP32-S3-USB-Bridge Pinout Diagram

Complete pin reference for Espressif ESP32-S3-USB-Bridge

The ESP32-S3-USB-Bridge features a 12-pin expansion connector providing access to key GPIOs and communication interfaces. Key pins include power supply (3V3 and GND), JTAG pins (TCK, TMS, TDI, TDO), UART pins (TX, RX), and control pins (Boot, Reset). This configuration allows for seamless integration with target chips and peripherals.

Useful Links

Datasheets and resources for Espressif ESP32-S3-USB-Bridge

Board Datasheet

Technical specifications

ESP32S3 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Espressif ESP32-S3-USB-Bridge

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
0	A0	T0	PWM
2			PWM	TDO
3			PWM	TDI
4			PWM	TCK
5			PWM	TMS
8				Reset
9				Boot
19				USB_D-
20				USB_D+
40				RX
41				TX
42				WS2812

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 Espressif ESP32-S3-USB-Bridge

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	dio
Maximum upload size	2048 KB (2097152 bytes)
Maximum data size	320 KB (327680 bytes)