diff --git a/boards/nrf51dk/Makefile b/boards/nrf51dk/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..f8fcbb53a06595771dae356338a7bf2c0673734d
--- /dev/null
+++ b/boards/nrf51dk/Makefile
@@ -0,0 +1,3 @@
+MODULE = board
+
+include $(RIOTBASE)/Makefile.base
diff --git a/boards/nrf51dk/Makefile.dep b/boards/nrf51dk/Makefile.dep
new file mode 100644
index 0000000000000000000000000000000000000000..6df82abd160746825d6ac868fe0141983b5a29c4
--- /dev/null
+++ b/boards/nrf51dk/Makefile.dep
@@ -0,0 +1,5 @@
+ifneq (,$(filter saul_default,$(USEMODULE)))
+ USEMODULE += saul_gpio
+endif
+
+include $(RIOTBOARD)/common/nrf51/Makefile.dep
diff --git a/boards/nrf51dk/Makefile.features b/boards/nrf51dk/Makefile.features
new file mode 100644
index 0000000000000000000000000000000000000000..94158d8eedf7c1296d78168211af05593667c25f
--- /dev/null
+++ b/boards/nrf51dk/Makefile.features
@@ -0,0 +1,7 @@
+# Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_uart
+
+# include common nrf51 based boards features
+include $(RIOTBOARD)/common/nrf51/Makefile.features
diff --git a/boards/nrf51dk/Makefile.include b/boards/nrf51dk/Makefile.include
new file mode 100644
index 0000000000000000000000000000000000000000..1290b19c623e1008afdf4b4dc28bec08b77bf7aa
--- /dev/null
+++ b/boards/nrf51dk/Makefile.include
@@ -0,0 +1,17 @@
+# define the used CPU
+export CPU_MODEL = nrf51x22xxac
+
+# define the default port depending on the host OS
+PORT_LINUX ?= /dev/ttyACM0
+PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.SLAB_USBtoUART*)))
+
+# use openocd by default to program this board
+PROGRAMMER ?= openocd
+
+# dap debug adapter is required for openocd
+ifeq (openocd,$(PROGRAMMER))
+ DEBUG_ADAPTER = dap
+endif
+
+# include nrf51 boards common configuration
+include $(RIOTBOARD)/common/nrf51/Makefile.include
diff --git a/boards/nrf51dk/board.c b/boards/nrf51dk/board.c
new file mode 100644
index 0000000000000000000000000000000000000000..5b72baa4da9111a45ac24641d333a16f0708adc9
--- /dev/null
+++ b/boards/nrf51dk/board.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2018 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup boards_nrf51dk
+ * @{
+ *
+ * @file
+ * @brief Board initialization code for the nRF51DK
+ *
+ * @author Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ * @}
+ */
+
+#include "board.h"
+#include "periph/gpio.h"
+
+void board_init(void)
+{
+ /* initialize the board LEDs, set pins as output and turn LEDs off */
+ gpio_init(LED0_PIN, GPIO_OUT);
+ gpio_init(LED1_PIN, GPIO_OUT);
+ gpio_init(LED2_PIN, GPIO_OUT);
+ gpio_init(LED3_PIN, GPIO_OUT);
+ gpio_set(LED0_PIN);
+ gpio_set(LED1_PIN);
+ gpio_set(LED2_PIN);
+ gpio_set(LED3_PIN);
+
+ /* initialize the board buttons */
+ gpio_init(BTN0_PIN, BTN0_MODE);
+ gpio_init(BTN1_PIN, BTN1_MODE);
+ gpio_init(BTN2_PIN, BTN2_MODE);
+ gpio_init(BTN3_PIN, BTN3_MODE);
+
+ /* initialize the CPU */
+ cpu_init();
+}
diff --git a/boards/nrf51dk/doc.txt b/boards/nrf51dk/doc.txt
new file mode 100644
index 0000000000000000000000000000000000000000..93090d1bee3d8c9e5808907975d7f10ff64d50dc
--- /dev/null
+++ b/boards/nrf51dk/doc.txt
@@ -0,0 +1,33 @@
+/**
+@defgroup boards_nrf51dk nRF51DK Development Kit
+@ingroup boards
+@brief Support for the Nordic nRF51DK Development Kit
+
+## Overview:
+
+The nRF51 DK is a low-cost, versatile single-board development kit for
+Bluetooth low energy, ANT and 2.4GHz proprietary applications using the nRF51
+Series SoC.
+
+## Flashing the Device:
+
+The nRF51DK board is shipped with an on-board JLink debugger that doesn't work
+well with UART: the shell is only working on RX but not TX.
+
+Thus, we recommend to update the flasher ship with DAPLink as described
+[here](https://armmbed.github.io/DAPLink/?board=Nordic-nRF51-DK):
+1. Download [this firmware](https://armmbed.github.io/DAPLink//firmware/0251_sam3u2c_mkit_dk_dongle_nrf5x_0x5000.bin)
+2. While holding down the boards reset button, connect the boards USB debug
+ port to the computer. It should enumerate as `BOOTLOADER`
+3. Using a filesystem browser, drag-n-drop the firmware file to the
+ `BOOTLOADER` folder
+4. Power-cycle the board, a new DAPLink mount point should appear
+
+The programmer used to flash this board is OpenOCD.
+
+To flash the board, use the following command:
+```
+$ make BOARD=nrf51dk flash
+```
+from any application directory.
+ */
diff --git a/boards/nrf51dk/include/board.h b/boards/nrf51dk/include/board.h
new file mode 100644
index 0000000000000000000000000000000000000000..6e14b6de3f42e93607a51d8749b036a70f93fc03
--- /dev/null
+++ b/boards/nrf51dk/include/board.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2018 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup boards_nrf51dk
+ * @{
+ *
+ * @file
+ * @brief Board specific configuration for the nRF51DK
+ *
+ * @author Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "board_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name LED pin definitions and handlers
+ * @{
+ */
+#define LED0_PIN GPIO_PIN(0, 21)
+#define LED1_PIN GPIO_PIN(0, 22)
+#define LED2_PIN GPIO_PIN(0, 23)
+#define LED3_PIN GPIO_PIN(0, 24)
+
+#define LED0_MASK (1 << 21)
+#define LED1_MASK (1 << 22)
+#define LED2_MASK (1 << 23)
+#define LED3_MASK (1 << 24)
+
+#define LED0_ON (NRF_GPIO->OUTCLR = LED0_MASK)
+#define LED0_OFF (NRF_GPIO->OUTSET = LED0_MASK)
+#define LED0_TOGGLE (NRF_GPIO->OUT ^= LED0_MASK)
+
+#define LED1_ON (NRF_GPIO->OUTCLR = LED1_MASK)
+#define LED1_OFF (NRF_GPIO->OUTSET = LED1_MASK)
+#define LED1_TOGGLE (NRF_GPIO->OUT ^= LED1_MASK)
+
+#define LED2_ON (NRF_GPIO->OUTCLR = LED2_MASK)
+#define LED2_OFF (NRF_GPIO->OUTSET = LED2_MASK)
+#define LED2_TOGGLE (NRF_GPIO->OUT ^= LED2_MASK)
+
+#define LED3_ON (NRF_GPIO->OUTCLR = LED3_MASK)
+#define LED3_OFF (NRF_GPIO->OUTSET = LED3_MASK)
+#define LED3_TOGGLE (NRF_GPIO->OUT ^= LED3_MASK)
+/** @} */
+
+/**
+ * @name Button pin definitions
+ * @{
+ */
+#define BTN0_PIN GPIO_PIN(0, 17)
+#define BTN0_MODE GPIO_IN_PU
+#define BTN1_PIN GPIO_PIN(0, 18)
+#define BTN1_MODE GPIO_IN_PU
+#define BTN2_PIN GPIO_PIN(0, 19)
+#define BTN2_MODE GPIO_IN_PU
+#define BTN3_PIN GPIO_PIN(0, 20)
+#define BTN3_MODE GPIO_IN_PU
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */
diff --git a/boards/nrf51dk/include/gpio_params.h b/boards/nrf51dk/include/gpio_params.h
new file mode 100644
index 0000000000000000000000000000000000000000..44210728a2d2e16403222bcf857eef5bf4ced704
--- /dev/null
+++ b/boards/nrf51dk/include/gpio_params.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2018 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup boards_nrf51dk
+ * @{
+ *
+ * @file
+ * @brief Configuration of SAUL mapped GPIO pins
+ *
+ * @author Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief LED configuration
+ */
+static const saul_gpio_params_t saul_gpio_params[] =
+{
+ {
+ .name = "LED 1",
+ .pin = LED0_PIN,
+ .mode = GPIO_OUT,
+ .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+ },
+ {
+ .name = "LED 2",
+ .pin = LED1_PIN,
+ .mode = GPIO_OUT,
+ .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+ },
+ {
+ .name = "LED 3",
+ .pin = LED2_PIN,
+ .mode = GPIO_OUT,
+ .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+ },
+ {
+ .name = "LED 4",
+ .pin = LED3_PIN,
+ .mode = GPIO_OUT,
+ .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+ },
+ {
+ .name = "Button 1",
+ .pin = BTN0_PIN,
+ .mode = BTN0_MODE,
+ .flags = SAUL_GPIO_INVERTED,
+ },
+ {
+ .name = "Button 2",
+ .pin = BTN1_PIN,
+ .mode = BTN1_MODE,
+ .flags = SAUL_GPIO_INVERTED,
+ },
+ {
+ .name = "Button 3",
+ .pin = BTN2_PIN,
+ .mode = BTN2_MODE,
+ .flags = SAUL_GPIO_INVERTED,
+ },
+ {
+ .name = "Button 4",
+ .pin = BTN3_PIN,
+ .mode = BTN3_MODE,
+ .flags = SAUL_GPIO_INVERTED,
+ },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */
diff --git a/boards/nrf51dk/include/periph_conf.h b/boards/nrf51dk/include/periph_conf.h
new file mode 100644
index 0000000000000000000000000000000000000000..8b58aea3ce8bba6a1b9f0ee762bf179efc4d7fa4
--- /dev/null
+++ b/boards/nrf51dk/include/periph_conf.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2018 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup boards_nrf51dk
+ * @{
+ *
+ * @file
+ * @brief Peripheral configuration for the Nordic nRF51DK
+ *
+ * @author Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef PERIPH_CONF_H
+#define PERIPH_CONF_H
+
+#include "periph_cpu.h"
+#include "periph_conf_common.h"
+#include "cfg_clock_16_1.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name UART configuration
+ * @{
+ */
+#define UART_NUMOF (1U)
+/* UART pin configuration */
+#define UART_HWFLOWCTRL 1
+#define UART_PIN_RX 11
+#define UART_PIN_TX 9
+#define UART_PIN_RTS 8
+#define UART_PIN_CTS 10
+/** @} */
+
+/**
+ * @name SPI configuration
+ * @{
+ */
+static const spi_conf_t spi_config[] = {
+ {
+ .dev = NRF_SPI0,
+ .sclk = 29,
+ .mosi = 25,
+ .miso = 28
+ }
+};
+
+#define SPI_NUMOF (sizeof(spi_config) / sizeof(spi_config[0]))
+/** @} */
+
+/**
+ * @name I2C configuration
+ * @{
+ */
+static const i2c_conf_t i2c_config[] = {
+ {
+ .dev = NRF_TWI1,
+ .pin_scl = 7,
+ .pin_sda = 30,
+ .ppi = 0,
+ .speed = I2C_SPEED_NORMAL
+ }
+};
+
+#define I2C_NUMOF (sizeof(i2c_config) / sizeof(i2c_config[0]))
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_CONF_H */
+/** @} */