The Tiny BLE is a Bluetooth Low Energy development board designed with low energy consumption and small size in mind. It's integrated with current measurement feature to provide real time energy consumption data, which is essential for developers to optimize software to design long battery life devices. It supports ARM mbed cloud-based IDE with an handy C/C++ SDK and a large number of open source libraries, which makes prototyping and development extremely easy.
TinyBLE Bluetooth Low Energy Development Board
Specs:
CMSIS DAP interface for drag-n-drop programming
Nordic nRF51822: ARM Cortex-M0 + 2.4GHz radio (BLE or ANT+)
Integrated current measurement and motion detection
Low power consumption
Compact modular design
https://www.seeedstudio.com/Seeed-Tiny-BLE-BLE-%2B-6DOF-Mbed-Platform-p-2268.html