The ESP-Dongle is a multifunctional USB device solution based on the Espressif ESP32-S3 module. It’s not only small but it also seamlessly integrates the functions of a USB mass storage (MSC) wireless disk and a USB wireless network card into one device. It also supports dual-function switching via a slide switch.

The ESP-Dongle can be used as an ordinary USB disk. Users can plug the ESP-Dongle directly into a phone and quickly read or write all files on the SD card via USB, supporting saving files from the SD card to the phone. It also supports uploading files from the phone to the SD card.

Users can insert the ESP-Dongle into a printer, connect their mobile phones to the ESP-Dongle’s Wi-Fi hotspot, upload files from the phone via the HTTP server interface, and the printer can read the files directly from the ESP-Dongle for printing.

See more on how this works in the Espressif article here.