Nordic nRF52840DK

Blecon Pre-built Firmware

The latest release of pre-built Blecon firmware for this board is available here: nrf52840dk-4.1.0.tar.bz2

Unpack the above archive and follow the instructions below to flash the firmware on your development board.

Flashing Prebuilt Firmware

Requirements

• Computer with Windows, macOS, or Linux

• USB-C cable to connect your nRF54L15DK

• Nordic nRF Connect for Desktop

Steps

1. Connect your nRF52840DK to your computer with the USB-C cable

2. Start the nRF Connect for Desktop app and select the Programmer tool.

3. Click the Blue "Select Device" dropdown in the top-left of the Programmer tool and select the "nRF52840 DK" device

4. In the "File" section of the sidebar, click the "Add File" button and select "Browse...", then select the firmware you wish to flash.

5. In the "Device" section of the sidebar, click the "Erase and write" button to program the firmware

Connecting to UART

The nRF52840DK J-Link USB interface exposes a virtual serial port to interface with the module's UART.

• On Windows this interface is usually named COMxx. In Windows Device Manager the port will appear as COMxx (JLink CDC UART Port)

• On Mac this interface is usually named /dev/tty.usbmodemXXXXXXXXXXX.

• On Linux this port is usually named /dev/ttyACMx.

Develop With this Board in Zephyr

You will first need to set up Zephyr and initialise a workspace for the Blecon Device SDK

The board target for the nRF54L15DK is: nrf52840dk/nrf52840

Sample command for building and flashing the Devboard Demo Application:

west build -p -b nrf52840dk/nrf52840 -s blecon-device-sdk/examples/zephyr/devboard-demo
west flash

Change the source path option (-s) to build the other examples.

Button and LED mappings

Blecon Devboard Demo

Refer to the Devboard Demo App Getting Started Guide for instructions about how to use this application.

Demo App Function	Board Button
ping	BUTTON 0
announce	BUTTON 1

Demo App Function	Board LED
Blecon status	LED0