Zephyr can use the nrf52_vbluno52 board configuration to run on the VBLUno52 board, a VNG Bluetooth Low Energy UNO using an nRF52832 ARM Cortex-M4F processor. It provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and the following devices:

  • NVIC
  • RTC
  • UART
  • GPIO
  • RADIO (Bluetooth Low Energy 5.0)
nRF52 VBLUno52

nRF52_VBLUno52 board


The VBLUno52 board has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 64 MHz.

Supported Features

The nrf52_vbluno52 board configuration supports the following hardware features:

Interface Controller Driver/Component
NVIC on-chip nested vectored interrupt controller
RTC on-chip system clock
UART on-chip serial port
GPIO on-chip gpio
FLASH on-chip flash
RADIO on-chip Bluetooth
I2C on-chip i2c
SPI on-chip spi

Other hardware features are not supported by the Zephyr kernel.

Connections and IOs


  • LED = LED0 (green) = P0.12

Push buttons

  • BUTTON = BUT = SW0 = P0.17

Programming and Debugging


The VBLUno52 board has an on-board DAPLink (CMSIS-DAP) interface for flashing and debugging. You do not need any other programming device. You only need to install the pyOCD tool (

See the Getting Started Guide for general information on setting up your development environment.

You can build and flash applications in the usual way. Here is an example for the Hello World application.

# On Linux/macOS
cd $ZEPHYR_BASE/samples/hello_world
mkdir build && cd build

# On Windows
cd %ZEPHYR_BASE%\samples\hello_world
mkdir build & cd build

# Use cmake to configure a Ninja-based build system:
cmake -GNinja -DBOARD=nrf52_vbluno52 ..

# Now run ninja on the generated build system:
ninja flash

Testing the VBLUno52 with Zephyr: buttons, LEDs, UART, BLE

Here are some sample applications that you can use to test different components on the VBLUno52 board: