To further trim the system costs, a true wireless option using Bluetooth only, and no extra hardware, repurposes the Bluetooth infrastructure already available on the nodes to address the modules.

The power inductor can be skipped under certain conditions,” said Adrie Van Meijeren, product marketing manager Americas, Bluetooth Low Energy, at Dialog Semiconductor. Fig. 3: Alkaline battery cell ...

If you walk past one, the Bluetooth function on your ... This is Apple's diagram of a typical iBeacon setup: The system can detect whether you are near or far from a beacon, and send you a ...