Table of Contents
Why Bluetooth low energy BLE communication is prefer for IoT device communication?
First, Bluetooth usually requires physical proximity to initiate a signal broadcast, so there is no possibility of remote attacks. Second, Bluetooth requires much less energy than Wi-Fi, so it works better for low-power IoT devices such as basic sensors.
What is Bluetooth broadcasting?
Unlike other digital channels for sending information, Bluetooth broadcasting allows for directing broadcasted information towards all people that are in the area, rather than a group of known people.
How does BLE save energy?
BLE technology uses the same adaptive frequency hopping (AFH) technology as classic Bluetooth technology. To minimize the cost and energy consumption of using AFH, BLE technology has reduced the number of channels to 40 2-MHz wide channels instead of the 79 1-MHz wide channels used with classic Bluetooth technology.
What is Bluetooth Low Energy BLE protocol for an Internet of Things IoT?
What is Bluetooth Low Energy? For a novice, it is simple to see BLE as a type of Bluetooth that uses less power, consumption or energy. It is an eco-friendly form of Bluetooth that has been developed specifically to facilitate the “Internet of Things”.
What are ble beacons and how do they work?
Data Broadcast (aka BLE beacons, aka connection-less communication) used for sensors broadcasting their data openly to any interested neighboring device. This is a one-way communication method where a device broadcasts its data to all neighbouring devices in RF range.
How to establish a BLE connection in an embedded device?
In order to establish a BLE connection we need to have a Peripheral/Central GAP roles pair. The Peripheral GAP role is optimized to consume the least amount of processing power and memory footprint. This is most of the time the role chosen for the embedded device being designed. It uses the LL slave role.
What are the disadvantages of BLE data broadcast?
The broadcaster can broadcast data to all Observers in radio range, however an Observer can not send any useful data to the Broadcaster. Another drawback of BLE Data Broadcast is that the data sent is seen by all neighboring devices, you can not send directed customized data to individual devices.
How does Bluetooth Low Energy (BLE) work?
Bluetooth Low Energy (BLE) has the ability to exchange data in one of two states: connected and advertising modes. Connected mode uses the Generic Attribute (GATT) layer to transfer data in a one-to-one connection. Advertising mode uses the Generic Access Profile (GAP) layer to broadcast data out to anyone who is listening.