Arch Link is an mbed enabled development board based on Nordic nRF51822 and WIZnet W5500 ethernet interface. With Arduino form factor, Grove connectors and micro SD interface, it is extremely easy to create a bluetooth low energy device.
Features:

mbed enabled

Online IDE
Easy to use C/C++ SDK
Handy libraries

CMSIS DAP based on LPC11U35

Drag-n-drop programming
Debug using CMSIS DAP standard
USB virtual serial for communication

Arduino form factor with Grove connectors

I2C and UART connecter on board

Nordic nRF51822 Multi-protocol Bluetooth 4.0 low energy/2.4GHz RF SoC

ARM Cortex M0 processor
256kB flash/16kB RAM
Configurable I/O mapping for digital I/O

WIZnet W5500 Ethernet

Supports following Hardwired TCP/IP Protocols : TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE
Supports Power down mode
Supports Wake on LAN over UDP
Supports High Speed Serial Peripheral Interface(SPI MODE 0, 3)
Internal 32Kbytes Memory for Tx/Rx Buffers
10BaseT/100BaseTX Ethernet PHY embedded
with RJ45 connector

USB Micro B connector
Micro SD Card connector

Get Started:

Clickthis linkto import the mbed_blinky program
compile and download the compiled hex file
Drag-n-drop the compiled hex file into the MBED disk

Firmware Update:
The latest Arm Mbed DAPLink interface firmware for the Seeed Arch Link is available at:
arm MBED DAPLink
github