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An Open-Source, Micro Development Kit for IoT Applications using the nRF52840 SoC


The nRF52840-MDK is a versatile, easy-to-use IoT hardware platform for Bluetooth 5, Bluetooth Mesh, Thread, IEEE 802.15.4, ANT and 2.4GHz proprietary applications using the nRF52840 SoC.

The development kit comes with a fully integrated debugger (also known as DAPLink) that provides USB drag-and-drop programming, USB Virtual COM port and CMSIS-DAP interface.

The kit contains a Microchip USB 2.0 Hi-Speed hub controller with two downstream ports: one for DAPLink interface and one for nRF52840 USB device controller. The kit also features ultra-low power 64-Mb QSPI FLASH memory, programmable user button, RGB LED, up to 24 GPIOs, antenna selection for custom applications.

It supports the standard Nordic Software Development Tool-chain using GCC, Keil and IAR. It can also be used to play with many popular frameworks, such as nRF5 SDK, nRF5 SDK for Mesh, OpenThread, ZigBee 3.0, Mbed OS 5, Zephyr, Mynewt, Web Bluetooth, iBeacon, Eddystone, and more.

Hardware Features

  • Nordic nRF52840 System-on-Chip
    • ARM® Cortex®-M4F processor optimized for ultra-low power operation
    • Combining Bluetooth 5, Bluetooth Mesh, Thread, IEEE 802.15.4, ANT and 2.4GHz proprietary
    • On-chip NFC-A tag
    • On-chip USB 2.0 (Full speed) controller
    • ARM TrustZone® Cryptocell 310 security subsystem
    • 1 MB FLASH and 256 kB RAM
  • Program/Debug options with DAPLink
    • MSC - drag-n-drop programming flash memory
    • CDC - virtual com port for log, trace and terminal emulation
    • HID - CMSIS-DAP compliant debug channel
    • WEBUSB HID - CMSIS-DAP compliant debug channel
  • Microchip 2-Port USB 2.0 Hi-Speed Hub Controller
  • External ultra-low power 64-Mb QSPI FLASH memory
  • Up to 24 GPIOs available via headers
  • IF Boot/Reset Button
  • User programmable Button and RGB LED
  • On-board 2.4G chip antenna
  • U.FL connector selectable for external antenna
  • 3.3V regulator with 1A peak current output
  • VBUS & VIN Power-Path Management
  • Reversible USB 3.1 Type-C Connector
  • Breadboard-friendly with dual 18-Pin headers
  • Measures 1.97" x 0.9" x 0.51" (50mm x 23mm x 13mm) with headers soldered in

Pinout Diagram

Software Resource

The nRF52840-MDK can be used to play with : nRF5 SDK, nRF5 SDK for Mesh, OpenThread, Mbed OS 5, Zephyr, Mynewt, Web Bluetooth, Eddystone, and more.

Framework Brief Description
nRF5 SDK Offical Software Development Kit for nRF51 and nRF52 Series
nRF5 SDK for Mesh Software Development Kit for Bluetooth mesh solutions using nRF51 Series and nRF52 Series
OpenThread An open-source implementation of Thread® released by Nest
Arm Mbed OS An open-source platform operating system designed for the internet of things
Zephyr A Small, Scalable Open Source RTOS for Internet of Things Embedded Devices
Mynewt An OS to build, deploy and securely manage billions of devices
Arm Mbed DAPLink An open-source software project that enables programming and debugging application running on Arm Cortex CPUs
Web Bluetooth Bluetooth support for the Web
iBeacon A Bluetooth low energy advertising message format designed by Apple
Eddystone A protocol specification that defines a Bluetooth low energy message format for proximity beacon messages
CircuitPython A Python language for microcontrollers designed to simplify experimentation and learning
TinyGo Go compiler for small devices, based on LLVM
Rust for nrf52840-mdk Rust support for the nrf52840-mdk development board

Hardware Resource

Releases Design Files
V1.0 nRF52840-MDK V1.0 Pinout Diagram
nRF52840-MDK V1.0 Schematic
nRF52840-MDK V1.0 Board File
nRF52840-MDK V1.0 3D STEP

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