Bluetooth Low Energy (LE) is one of the latest enhancements to Bluetooth technology and, as the name suggests, it is aimed at "ultra" low power devices, such as heart rate monitors, thermometers, and laboratory sensors. Due to very low power consumption, devices compliant with this standard can operate for months or even years on coin cell batteries without the need for recharging. This cutting-edge book helps professionals understand the "whats", "whys", and "hows" of Bluetooth LE. It includes a broad view of the technology, identifies the various building blocks, and explains how they come together.