nRF21540 DBDevelopment Bundle

Bluetooth Low Energy, Bluetooth mesh, Thread and Zigbee and 2.4 GHz proprietary development bundle for 2.4 GHz wireless range extension

The nRF21540 Development Bundle (DB) is a versatile two board bundle for range extension of Bluetooth Low Energy, Bluetooth mesh, Thread, Zigbee, 802.15.4 and 2.4 GHz proprietary applications. It consists of a nRF21540 DK and a nRF21540 Evaluation Kit (EK).

It facilitates development exploiting all features of the nRF52840 SoC. It includes an NFC antenna that quickly enables utilization of the NFC-A tag peripheral. All GPIOs are available via edge connectors and headers, and 4 buttons and 4 LEDs simplify input and output to and from the SoC. An on-board external memory is connected to the QSPI peripheral in the nRF52840 SoC.

It is Arduino Uno Revision 3 compatible, making it possible to mount 3rd-party shields with ease. It comes with an on-board SEGGER J-Link debugger allowing programming and debugging both the on-board SoC and external targets through the debug out header. It also interfaces directly with the Power Profiler Kit.

The DK is typically powered with USB, but can be powered by a wide range of sources, within the supply range of 1.7 to 5.0 V. In addition to USB, it can be powered with external source, but also includes a CR2032 battery holder and a Li-Po battery connector, for in-field testing. Current consumption can be measured by using the dedicated current measurement pins.

Hardware layout and schematics for the nRF52840 DK are available under Downloads.

Download PDF Download the nRF21540 DB Product Brief here.

Key features

Supports Bluetooth LE, Bluetooth mesh, NFC, Thread and Zigbee

User-programmable LEDs(4) and buttons(4)

2.4 GHz and NFC antennas

SWF RF connector for direct RF measurements

On-board SEGGER J-Link debugger/programmer

Arduino Uno Rev3 form factor

Pins for measuring power consumption

1.7-5.0 V supply from USB, external, Li-Po battery or CR2032 coin cell battery

Interface MCU firmware

Selected version

170724 J-LINK

J-Link OB-SAM3U128-V2-NordicSemi 170724.bin


170724 J-LINK


nRF52840-DK HW files




Changelog: v2.0.1: Silkscreen update, added information leaflet


Changelog: v2.0.0

  • Updated battery protection circuit
  • Changed battery holder
  • Changed DCDC inductor

For nRF52840 USB:

  • Added series resistor on VBUS/VDDH
  • Removed USB 0R series resistors

For both nRF52840 and JLINK USB:

  • Changed USB shield connection


Changelog: v1.1.1: Adding cardboard box to kit packaging


Changelog v1.1.0: New nRF52840-QIAA revision


nRF52840 Preview DK Hardware Files


nRF52840 Preview DK Hardware Files

Heart rate monitor

Demo firmware

Selected version


nRF52840 DK