ESP32-S series chips like ESP32-S2 and ESP32-S3 come with a USB OTG interface, and Espressif unveiled the ESP32-S3-USB-OTG board last September in a post entitled “ESP-USB: Espressif’s Wireless Communication Solution“, where they mostly focused on USB code samples with documentation in Chinese only and provided few details about the board itself.
But I browsed the company’s official Aliexpress store earlier this week, and I noticed ESP32-S3-USB-OTG board was up for sale for $35 plus shipping, with additional information now available, so let’s have a closer look.
- Wireless module – ESP32-S3-MINI-1-N8 module with ESP32-S3 dual-core Xtensa LX7 processor with WiFi 4 and Bluetooth 5.0 connectivity, 8MB QSPI flash
- Storage – MicroSD card socket
- Display – 1.3-inch color LCD
- 1x Full-speed USB host port
- 1x Full-speed USB slave port
- 1x Micro USB port for debugging (UART console)
- Expansion – 14 pads with 6x GPIO, JTAG, 3.3V and GND
- Misc – 2x LEDs, Menu, Up and Down buttons, Boot and Reset buttons, BAT/5V selection switch
- Power Supply
- 5V via USB host or Micro USB port,
- Optional 4.2V/500mAh battery
- Dimensions – TBD
ESP32-S3-USB-OTG is comprised of two boards with the mainboard with the ESP32-S3 module and most ports, and a subboard with the LCD display. The photo below is the bottom of the mainboard with the 14 pads for I/Os and JTAG, battery solder pads, as well as the LEDs, and the CP2102N USB to TTL chip.
- USB Host
- USB camera support for video streaming, local JPEG encoding, and storage, image transmission over WiFi, etc…
- 4G USB dongle for cellular network access, use a WiFi hotspot, IoT gateways…
- USB Device
- USB mass storage – The board can be converted into a wireless USB disk, card reader, or music player
- Human Interface Device (HID) with the board acting as a USB touchpad, keyboard, or gamepad
- USB-UART bridge
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.