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USB (Universal Serial Bus) is a standard set of connectivity specifications enabling communication between various external devices and a host controller. Espressif’s USB Solutions provide users with a convenient and efficient way for device interconnection and data transmission. The ESP32-S, ESP32-C, and ESP32-P series of SoCs incorporate USB as one of their standard peripheral devices, providing USB 2.0 OTG (On-The-Go) and/or USB-Serial-JTAG interfaces for both Host and Device modes. This offers users a variety of USB Host solutions, such as doorbell cameras, 4G IoT gateways, electronic photo albums, and attendance machines, as well as USB Device solutions, namely peripherals, such as a keyboard, mouse, USB flash drive, microphone, etc.
USB 2.0 OTG
USB Host
USB Device
Devices powered by Espressif SoCs can be configured in USB Host Mode, enabling them to connect, control, and manage a wide range of USB peripherals. The USB Host Solution supports audio/video transmission,4G connectivity, mass storage, and human–machine interface devices. With USB Hub integration, it also allows multiple devices to be connected and managed simultaneously, further enhancing system scalability and application flexibility.
USB Multimedia
USB 4G Wi-Fi Router
USB External Storage
USB Human Interface
The USB Audio/Video Transmission Solution supports standard UVC and UAC drivers. Through a USB-OTG peripheral, it can interface with common USB cameras and, on a single SoC, enable USB camera data streaming, JPEG decoding, real-time LCD rendering, and Wi-Fi image transmission simultaneously. This solution is ideal for applications such as cat-eye viewers, smart doorbells and locks, and electronic endoscopes.
- Support for multiple camera connections
- Synchronous Transfer (MJPEG 1080p@30FPS，High-Speed)
- Bulk Transfer (MJPEG 1080p@60FPS，High-Speed)
- Simultaneous Audio-Video Transmission and Management
- High-definition 800x480 RGB Display
The USB 4G Wi-Fi Router Solution supports standard USB CDC (PPP)/RNDIS/ECM drivers. Through a USB-OTG peripheral, it connects to 4G Cat.1 and Cat.4 modules to enable medium- to high-speed dial-up internet access. It also supports Wi-Fi Soft-AP mode, allowing hotspots to be shared with IoT devices or human–machine interface devices for cost-effective, medium- to high-speed networking. This solution is suitable for applications such as 4G IoT gateways, MiFi mobile hotspots, smartwatches, outdoor cameras, and advertising lightboxes.
- Compatible with mainstream 4G modules
- USB hot-swapping
- 4G module status management
- Router backend management
The USB external storage Solution enables Espressif SoCs to support USB flash drive mounting, file system access, and OTA upgrades. It is compatible with USB 3.1/3.0/2.0 protocols and FAT32-formatted USB drives, and combined with the Wi-Fi capability of the ESP32, it also allows remote file transfer and wireless management. This solution is suitable not only for external storage scenarios such as electronic photo albums, attendance systems, and recording instruments, but can also be extended to smart home gateways, edge data collection terminals, and portable content distribution devices that require local–cloud collaboration.
- Maximum 2TB storage space
- Network file transfer and wireless management
- File systems access
- Fat32/exFat formats
- OTA via USB drive
The USB Human Interface Solution supports Host HID (Human Interface Device) drivers, enabling real-time transmission of control signals from keyboards, mice, game controllers, and other HID devices through the USB interface. Combined with the Wi-Fi and Bluetooth capabilities of the ESP32, it not only supports local interaction but can also be extended to wireless input/output, remote control, and multi-device collaboration. This solution is ideal for building HID wireless adapters, minicomputer systems, handheld gaming devices, smart peripherals, and other applications that require rich interactive experiences.
- Supports connecting multiple devices simultaneously via a USB Hub
- Wide compatibility with HID-like devices
- Standard USB input peripherals
- Gaming peripherals
Configuring devices equipped with an Espressif SoC in Device mode, and leveraging Espressif's proprietary USB protocol stack or the open-source TinyUSB protocol stack, enables the devices to function as USB devices. This allows them to connect and interact with computers or other host devices through the USB interface. With the USB Device Solution, users can easily build USB devices for storage, HID (Human Interface Device), as well as audio and video applications.
USB Wireless Disk
USB HID Device
USB Audio
USB Video
The USB Wireless Flash Drive Solution is built on the USB Mass Storage Class (USB MSC) device standard. Integrating Wi-Fi capability into the device enables the development of shared wireless large-capacity storage devices, such as USB storage, card readers, digital music players, digital media players, and more.
- USB-Wi-Fi bidirectional access
- Multiple device connections
- File synchronization
The USB HID Device Solution enables Espressif SoCs to emulate peripherals such as keyboards, mice, and game controllers. It supports the standard HID protocol, allowing plug-and-play use without extra drivers. With the Wi-Fi and Bluetooth capabilities of the ESP32, it also supports wireless input/output, remote control, and multi-device collaboration—ideal for adapters, smart remotes, programmable controllers, and gaming devices.
- USB + BLE HID Dual Mode
- Abundant open-source resources for easy development
- Custom HID Descriptors
The USB Audio Solution supports the USB Audio Class (UAC 2.0) protocol, enabling Espressif SoCs to function as USB audio devices when connected to a host. It delivers high-quality audio transmission with support for multiple sampling rates and bit depths to meet diverse application needs. With the Wi-Fi and Bluetooth capabilities of the ESP32, the solution extends beyond wired audio to support wireless playback, remote control, and multi-device collaboration. It is suitable for USB microphones, USB speakers, USB headsets, smart speakers, and other audio peripherals.
- UAC 2.0
- Multiple data formats
The USB Video Solution supports the UVC protocol, enabling Espressif SoCs to act as USB camera devices. It works with traditional cameras and UVC-based devices such as capture cards or sensor-to-video terminals. With Wi-Fi support, it enables dual-mode USB + Wi-Fi video transmission, while on-chip AI can handle face, pedestrian, and gesture recognition. Typical applications include doorbell cameras, wireless surveillance, remote video, and smart interactive terminals.
- USB UVC (USB Video Class) device driver
- Maximum 1080P@60FPS MJPEG (High-Speed)
- Supports on-device AI vision processing
USB-Serial-JTAG
Specialized USB Device Solution
The USB-Serial-JTAG interface comprises USB-to-Serial and USB-to-JTAG converters. The chip can be directly connected to a PC host via the USB-Serial-JTAG interface, enabling factory-built specialized USB device functions, such as firmware flashing, log output, and JTAG debugging. The specialized USB Device Solution eliminates the need for external bridging, utilizes fewer pins, accelerates firmware download speeds, and simplifies the JTAG debugging configuration.
USB Flashing
USB flashing is one of the primary functions of the specialized USB Device Solution. Traditional devices typically use a serial port for flashing, requiring an additional serial-to-USB chip for connecting to a computer. In contrast, devices equipped with an Espressif SoC can directly connect to a computer by using the USB flashing feature. The USB flashing function inherently supports two firmware download modes: USB CDC (requires support for USB-Serial-JTAG peripherals) and USB DFU (requires support for USB-OTG peripherals), providing increased flexibility and efficiency. Its flashing speed also surpasses that of serial port flashing by several times.
Contact Us
If you have any questions about the USB Solutions or are seeking a business collaboration with Espressif, please contact our customer support team.
