Tescom TC-3000C, User Manual

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1. Getting Started
Introduction to Bluetooth Low Energy
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1.1 Introduction to Bluetooth Low Energy
A technology, Bluetooth Low Energy (BLE), of Bluetooth has been added to Bluetooth Specification
versiono 4.0. "Bluetooth Smart" typically reduces Bluetooth Low Energy also known as call by BLE.
As it is recognized from its name, low energy and low cost are the main concern, so it is specially
designed to be operated even by coin-cell battery. As a result, Bluetooth Low Energy (BLE) makes
devices to be developed with low cost.
Also, Bluetooth Low Energy (BLE) is designed to be operated with existing Bluetooth devices.
It is operated on 40 channels, which constitutes with interval of 2 MHz, in ISM band of 2.4 GHz. It
provides data transmission rate of 1 Mbps within range of 10 meters using GFSK modulation. As well
as existing Bluetooth (Classic Bluetooth), BLE uses frequency hopping but as it uses adaptive frequency
hopping, hopping speed is slower than existing Bluetooth’s hopping speed. BLE performs ‘Advertise’
function, which discovers devices using 3 channels among 40 channels. If devices are discovered, it
sends and receives data using rest of 37 channels.