esp-dev-kits Choose target... Choose version... ESP32-S3 Boards ESP32-S3-DevKitC-1 ESP32-S3-USB-OTG User Guide ESP32-S3-LCD-EV-Board ESP-VoCat ESP-DualKey EOL (End of Life) Boards Resources and Legal Notices Related Documentation and Resources Disclaimer and Copyright Notice esp-dev-kits ESP32-S3-USB-OTG Download PDF ESP32-S3-USB-OTG [中文] ESP32-S3-USB-OTG is a development board that focuses on USB-OTG function verification and application development. Application examples for this board can be found at Examples . User Guide Getting Started Hardware Reference Related Documents Next Previous Suggestion on this document? Provide feedback Help improve this document? Edit on GitHub Need more information? Check ESP forum Sales Questions Technical Inquiries © Copyright 2016 - 2026, Espressif Systems (Shanghai) CO., LTD Built with Sphinx using a theme based on Read the Docs Sphinx Theme. esp-dev-kits Choose target... Choose version... ESP32-S3 Boards ESP32-S3-DevKitC-1 ESP32-S3-USB-OTG User Guide Getting Started Description of Components Application Examples Start Application Development Contents and Packaging Hardware Reference Block Diagram Power Supply Options USB HOST Interface Power Options USB Interface Switch Circuit LCD Interface SD Card Interface Charging Circuit Pin Layout Related Documents ESP32-S3-LCD-EV-Board ESP-VoCat ESP-DualKey EOL (End of Life) Boards Resources and Legal Notices Related Documentation and Resources Disclaimer and Copyright Notice esp-dev-kits ESP32-S3-USB-OTG ESP32-S3-USB-OTG Download PDF ESP32-S3-USB-OTG [中文] ESP32-S3-USB-OTG is a development board that focuses on USB-OTG function verification and application development. It is based on ESP32-S3 SoC, supports Wi-Fi and BLE 5.0 wireless functions, and supports USB host and USB device functions. It can be used to develop applications such as wireless storage devices, Wi-Fi network cards, LTE MiFi, multimedia devices, virtual keyboards and mice. The development board has the following features: Onboard ESP32-S3-MINI-1-N8 module, with built-in 8 MB flash Onboard USB Type-A host and device interface, with built-in USB interface switching circuit Onboard USB to serial debugging chip (Micro USB interface) Onboard 1.3-inch LCD color screen, supports GUI Onboard SD card interface, compatible with SDIO and SPI interfaces Onboard charging IC, can be connected to lithium battery ESP32-S3-USB-OTG (click to enlarge) The document consists of the following major sections: Getting Started: Provides a brief overview of ESP32-S3-USB-OTG and necessary hardware and software information. Hardware Reference: Provides detailed hardware information of ESP32-S3-USB-OTG. Related Documents: Provides links to related documents. Getting Started This section describes how to start using ESP32-S3-USB-OTG. It includes introduction to basic information about ESP32-S3-USB-OTG first, and then on how to start using the development board for application development, as well as board packaging and retail information. Description of Components The ESP32-S3-USB-OTG development board includes the following parts: Motherboard: ESP32-S3-USB-OTG motherboard is the core of the kit. The motherboard integrates the ESP32-S3-MINI-1 module and provides an interface of the 1.3-inch LCD screen. ESP32-S3-USB-OTG Top View (click to enlarge) The following table starts with the USB_HOST Interface on the left, and introduces the main components in the above figure in an anticlockwise order. Main components Description USB_HOST Interface USB Type-A female port, used to connect other USB devices. ESP32-S3-MINI-1 Module ESP32-S3-MINI-1 is a powerful, generic Wi-Fi + Bluetooth LE MCU module that has a rich set of peripherals. It has strong ability for neural network computing and signal processing. ESP32-S3-MINI-1 comes with a PCB antenna and is pin-to-pin compatible with ESP32-S2-MINI-1. MENU Button Menu button. Micro SD Card Slot Micro SD card can be inserted. Both four-line SDIO and SPI mode are supported. USB Switch IC By setting the level of USB_SEL, you can switch USB peripherals to make them either connected to the USB_DEV interface or the USB_HOST interface. USB_DEV will be connected by default. Reset Button Press this button to restart the system. USB_DEV Interface USB Type-A male port, can be connected to the USB host, and also used as a lithium battery charge power source. Power Switch Switch to ON to use battery power. Switch to OFF to power off battery. Boot Button Download button. Holding down Boot and then pressing Reset initiates Firmware Download mode for downloading firmware through the serial port. DW- Button Down button. LCD FPC Connector Used to connect the 1.3-inch LCD screen. UP+ Button Up button. USB-to-UART Interface A Micro-USB port used for power supply to the board, for flashing applications to the chip, as well as for communication with the chip via the on-board USB-to-UART bridge. ESP32-S3-USB-OTG Bottom View (click to enlarge) The following table starts with the Yellow LED on the left, and introduces the main components in the above figure in an anticlockwise order. Main components Description Yellow LED Driven by GPIO16, set high level to turn on. Green LED Driven by GPIO15, set high level to turn on. Charging LED During charging, the red light is on, which will be turned off when charged. Battery Solder Joints 3.6 V lithium battery can be welded to power the motherboard. Charging Circuit Used to charge lithium battery. Free Pins Idle pins that can be customized. USB-to-UART Bridge Single USB-to-UART bridge chip provides transfer rates up to 3 Mbps. Subboard: ESP32-S3-USB-OTG-SUB mount the 1.3-inch LCD screen ESP32-S3-USB-OTG Subboard (click to enlarge) Application Examples The following application examples are available for ESP32-S3-USB-OTG: factory - Demonstrates a factory demo for the ESP32-S3-USB-OTG development board, providing a reference for building, flashing, and monitoring projects using ESP-IDF and ESP Launchpad. For more examples and the latest updates, please refer to the examples folder. To explore the application examples or to develop your own, please follow the steps outlined in the Start Application Development section. Start Application Development Before powering on the ESP32-S3-USB-OTG, please make sure that the development board is intact. Required Hardware ESP32-S3-USB-OTG A USB 2.0 data cable (standard A to Micro-B) Computer (Windows, Linux or macOS) Software Setup Please proceed to Get Started, where Section Installation Step by Step will quickly help you set up the development environment and then flash an application example onto your board. Contents and Packaging Retail Orders If you order a few samples, each board comes in an individual package in either an antistatic bag or any packaging depending on your retailer. ESP32-S3-USB-OTG Package (click to enlarge) Which contains the following parts: Motherboard: ESP32-S3-USB-OTG Subboard: ESP32-S3-USB-OTG_SUB Fastener Mounting bolt (x4) Screw (x4) Nut (x4) For retail orders, please go to https://www.espressif.com/zh-hans/company/contact/buy-a-sample. Wholesale Order If purchased in bulk, the development board will be packaged in a large cardboard box. For wholesale orders, please go to https://www.espressif.com/en/contact-us/sales-questions. Hardware Reference Block Diagram The block diagram below shows the components of ESP32-S3-USB-OTG and their interconnections. ESP32-S3-USB-OTG Block Diagram (click to enlarge) Please note that the external interface corresponding to the USB_HOST D+ D- signal in the functional block diagram is USB DEV, which means that ESP32-S3 is used as a device to receive signals from other USB hosts. The external interface corresponding to the USB_DEV D+ D- signal is USB HOST, which means that ESP32-S3 acts as a host to control other devices. Power Supply Options There are three power supply methods for the development board: Power supply through the Micro_USB interface Use the USB cable (standard A to Micro-B) to connect the motherboard to a power supply device, and set battery switch to OFF. Please note that in this power supply mode, only the motherboard and display are powered. Power supply through the USB_DEV interface Set DEV_VBUS_EN to high level, and set the battery switch to OFF. This mode can supply power to the USB HOST interface. The lithium battery will be charged at the same time (if the lithium battery is installed) Power supply through the battery Set BOOST_EN to high level, and set the battery switch to ON. You should solder a 1-Serial lithium battery (3.7 V ~ 4.2 V) to the power solder joint reserved on the back of the motherboard first. This mode can supply power to the USB HOST interface at the same time. The battery interface description is as follows: Battery Connection (click to enlarge) USB HOST Interface Power Options The USB HOST interface (Type-A female port) can supply power to the connected USB device. The power supply voltage is 5 V and the maximum current is 500 mA. There are two power supply methods for the USB HOST interface: Power is supplied through the USB_DEV interface, and the 5 V power is directly from the power source connected to the interface. Power is supplied through the lithium battery, and the 3.6 V ~ 4.2 V voltage of the lithium battery is boosted to 5 V through the Boost circuit. The working status of Boost IC can be controlled by BOOST_EN/GPIO13, set high to enable Boost. Boost Circuit (click to enlarge) USB HOST interface power supply selection: BOOST_EN DEV_VBUS_EN Power Source 0 1 USB_DEV 1 0 Battery 0 0 No output 1 1 Undefined Power Switch Circuit (click to enlarge) 500 mA current limiting circuit: The current limiting IC MIC2005A can limit the maximum output current of the USB HOST interface to 500 mA. Please set the IDEV_LIMIT_EN (GPIO17) to high level to enable the current-limiting IC to output voltage. 500 mA Current Limiting Circuit (click to enlarge) USB Interface Switch Circuit USB Interface Switch Circ