Adafruit NRF52840 USB Key with TinyUF2 Bootloader - Bluetooth® Low Energ

This unique USB dongle, acting as a minimal nRF52840 wireless microcontroller dev board, offers a standalone BLE device that smoothly communicates with USB hosts without relying on the operating system's BLE stack. It's designed for flexibility, allowing programming in both Arduino and CircuitPython.

The pre-installed TinyUF2 bootloader simplifies code loading. Enter bootloader mode by holding the button while inserting the dongle into USB. Utilize the button for input in your projects or use the single blue LED indicator for alerts, connected to P1.13 and easily controlled via programming.

Potential usage includes serving as a beacon, an OS-less BLE interface, or a compact development platform for nRF52840 experimentation. With Nordic SDK, Arduino, CircuitPython, and MyNewt support, it accommodates varying development needs effortlessly, providing extensive versatility in a compact form.