WUD v1.2- Wireless USB Disk

Description

Introduction

The device has an ESP32-S2 module that allows it to be identified as a keyboard + USB disk. It also a microSD slot that can be identified as MSC SD Card.

The new ESP32-S2 module from Espressif addresses the security flaws in the original ESP32. While the ESP32-S2 does include improved security features, it lacks the BLE capabilities of the original ESP32 module. But it supports native USB.

#For sale

• WUD v1.2 at Aliexpressopen in new window

#Features

• ESP32-S2 Module
  • Xtensa® Single-Core 32-bit LX7 Microprocessor (up to 240MHz)
    • RISC-V ULP Coprocessor
    • 128KB ROM and 320KB SRAM
    • 4MB of Embedded SPI Flash Storage
  • Cryptographic Hardware Accelerators
    • AES, ECB/CBC/OFB/CFB/CTR, GCM, SHA, RSA, and ECC (Digital Signature)
  • Physical Security Features
    • Transparent external flash and RAM encryption (AES-XTS)
    • Secure Boot feature ensures only signed firmware (with RSA-PSS signature) is booted
    • HMAC and Digital Signature modules use software inaccessible keys to generate SHA-MAC and MAC signatures
  • Integrated 802.11 b/g/n WiFi 2.4GHz Transceiver (up to 150Mbps)
  • Integrated Temperature Sensor (-20°C to 110°C)
  • Operating Voltage: 3.0 to 3.6V
    • WiFi: 310mA (peak)
    • Light-Sleep: 550µA
    • Deep-Sleep: 20-235µA
• USB-A Connector
• Micro SD slot
• Reset and GPIO0 button of ESP32 S2. One of button is hall sensor

#Hardware overview

• Board Dimensions
  • 17mm x 50mm (Without USB case)
  • 19mm x 62mm (With USB case)
• USB-A Connector
• Micro SD slot
• ESP32-S2 mini Module
• Buttons
  • Reset button
  • GPIO0 for program
• Status LED – This indicator is connected to GPIO 21

#PCB version changes

• PCB v1.2
  • Reset button – Hall sensor
  • GPIO0 – K1
• PCB v1.1
  • Reset button – K1
  • GPIO0 – Hall sensor

#Device Firmware Upgrade through USB

The ESP32-S2 chip needs to be in bootloader mode for the detection as a DFU device and flashing. This can be achieved by pulling GPIO0 down, pulsing RESET down for a moment and releasing GPIO0.

How to make the ESP32-S2 go to bootloader mode

1. Plug the WUD to laptop
2. Pull down and hold the GPIO0 button
3. Press the reset button, WUD will go to bootloader mode now

#Software overview

The pre-flashed firmware is “Wireless USB diskopen in new window“. It use ESP32-S2 as an USB Disk with Wireless accessibility. HTTP file server be used with both upload and download capability.

Note: It’s a demo code. Don’t use it in serious application.

#Resources

• Schematic for PCB v1.1open in new window
• Schematic for PCB v1.2open in new window
• Datasheet for ESP32 S2 moduleopen in new window

#Firmware

• Source code of wireless usb diskopen in new window – written in Arduino
• usb_msc_wireless_disk from espressifopen in new window
• WUD-Duckyopen in new window Thanks tobozo for his great projects

For bulk order, please contact us for discount. zhengzeyi@aprbrother.com or skype: aprilbeacon or wechat: 13661293819