Getting started

Complete a few steps to set up the hardware and install the required software.

1. Download and install nRF Connect for Desktop.
   This includes the driver for the nRF52840 USB Device Firmware Upgrade (DFU) feature. For documentation on the tool, see nRF Connect for Desktop.
2. Insert the nRF52840 Dongle in a USB port on your computer.
   The status light (LD2) starts pulsing red, indicating that the Dongle is powered up and is in bootloader mode. After a few seconds, the computer will recognize the Dongle as a USB composite device. The driver needed for the nRF52840 USB DFU feature is also installed.
3. Optional: Download the nRF5 SDK.
   nRF5 SDK contains application examples for the Dongle. For documentation, see nRF5 SDK v17.1.0.
4. Optional: Download SEGGER Embedded Studio (SES).
   SES is needed for building application examples for the Dongle. It can be used free of charge with nRF devices.
5. Optional: Install nRF Util for nRF5 SDK.
   nrfutil can be used for programming the Dongle from the command line.
6. Open an nRF Connect for Desktop app and select the serial number of the nRF52840 Dongle as the target.

   Applications that support the nRF52840 Dongle will display the serial numbers of any connected Dongles in the device drop-down list.

   If the app supports the Dongle but the correct firmware is missing, you will be asked to confirm that you want to have the Dongle programmed. Click OK.

   If the Dongle contains the correct firmware, the app will start immediately.