Espressif Systems ESP Faq page 103

Chapter 4. Software framework
Does the ESP32-S2 support USB HID?
Yes. For the example of USB HID Device, please refer to
USB HID Host, please refer to
Why is this error log printed when I am testing the USB Camera + Wi-Fi Transfer example?
E (1437) UVC STREAM: Configuration descriptor larger than
transfer max length
→
This error log is reported because the length of the descriptor sent by the USB Camera is larger than the
default length (256). You can modify the following configuration to 2048 for testing:
Component config > UVC Stream > (2048) Max control transfer data size
(Bytes)
Does ESP32-S3 support USB CDC for printing program log and downloading firmware?
Yes, ESP32-S3 supports printing program log and downloading firmware using USB CDC when the
following configuration option is enabled:
Component config > ESP System Settings > Channel for console output >
USB CDC
Does ESP32-S3 support devices with USB Device being Class 0?
• Yes, please refer to the example esp-idf/components/tinyusb/additions/src/usb_descriptors.c. When class code
== 00H, the class category is specified by the interface.
Can the ESP32-S3's USB OTG interface be used in both USB Host and USB Device modes?
• The ESP32-S3' s USB OTG interface can not be used as USB Host and USB Device at the same time. However,
it is possible to switch between the USB Host mode and the USB Device mode by software.
• If you need the standard negotiation function of USB OTG, please note that currently ESP32-S3 only supports
this function on the hardware, and does not support it in software protocol.
When testing the esp-idf/examples/peripherals/usb/device/tusb_serial_device example to send data using
TinyUSB, do I have to use the tinyusb_cdcacm_write_flush() function?
To prevent sending FIFO overflows, you can use the'tinyusb_cdcacm_write_flush()'function to flush.
However, a large number of cycles of flushing may fail. So, it is recommended to set it according to the
actual application.
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ESP-IDF Host HID example.
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ESP-IDF Device HID. For the example of
control␣
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