Dev boards are getting fancy...
I bought one of these Waveshare ESP32-H2-DEV-KIT-N4 boards to help debug a client Thread project.
For $6AU I saw a single USB port and expected it'd use the ESP32 internal USB Serial/JTAG Peripheral feature.
Nope... this thing has a USB hub chip on it, and a dedicated USB/serial interface chip, so it shows up as two USB serial ports!
Screenshot of the tree output from the USB "cyme" tool, showing the USB HUB node with two children: "USB Single Serial" and "USB JTAG/serial debug unit"
Screenshot of the components of the ESP32-H2-DEV-KIT-N4 board, including a labelled "USB HUB chip" and "USB to UART chip"