Bluetooth® Low Energy (Bluetooth® LE or BLE) is a low-power, short-range wireless communication technology that is ideal for use on the Internet of Things (IoT). BLE is designed for small and distinct data transfer, providing a fast connection between client and server and a simple user interface, which makes it ideal for control and monitoring applications. Arduino 101* includes on-board Bluetooth® LE to enable developers to interact with Bluetooth®-enabled devices such as phones and tablets. We will discuss how to create a BLEservice and communicate with an Android* device. We also set up a BLE blood pressure monitoring system to demonstrate the BLE capabilities of the Arduino 101*.