Read e-book online Bluetooth Low Energy: The Developer's Handbook PDF

By Robin Heydon

ISBN-10: 013288836X

ISBN-13: 9780132888363

The First whole consultant to Bluetooth Low strength: the way it Works, What it may Do, and the way to use It

 

A radical departure from traditional Bluetooth know-how, Bluetooth low power (BLE) allows leap forward instant functions in industries starting from healthcare to transportation. working on a coin-sized battery, BLE can function reliably for years, connecting and lengthening every thing from own region community units to next-generation sensors. Now, one of many standard’s top builders has written the 1st finished, available creation to BLE for each procedure developer, fashion designer, and engineer.

 

Robin Heydon, a member of the Bluetooth SIG corridor of popularity, has introduced jointly crucial details formerly scattered via a number of criteria files, sharing the context and professional insights had to enforce high-performance operating platforms. He first studies BLE’s layout pursuits, explaining how they drove key architectural judgements, and introduces BLE’s cutting edge utilization types. subsequent, he completely covers how the 2 major elements of BLE, the controller and host, interact, after which addresses key matters from safety and profiles via trying out and qualification. this information has enabled the production of Bluetooth shrewdpermanent and Bluetooth clever prepared units.

 

This advisor is an quintessential significant other to the authentic BLE criteria files and is for each technical specialist and decision-maker contemplating BLE, making plans BLE items, or remodeling plans into operating systems.

 

Topics Include

  • BLE machine varieties, layout objectives, terminology, and center innovations
  • Architecture: controller, host, functions, and stack splits
  • Usage types: presence detection, information broadcasting, connectionless versions, and gateways
  • Physical Layer: modulation, frequency band, radio channels, strength, tolerance, and variety
  • Direct try Mode: transceiver trying out, interfaces, and HCI
  • Link Layer: country laptop, packets, channels, broadcasting, encryption, and optimization
  • HCI: physical/logical interfaces, controller setup, and connection administration
  • L2CAP: channels and packet constitution, and LE signaling channels
  • Attributes: grouping, prone, features, and protocols
  • Security: pairing, bonding, and knowledge signing
  • Generic entry Profiles: roles, modes, tactics, safeguard modes, info advertisements, and companies
  • Applications, units, prone, profiles, and peripherals
  • Testing/qualification: beginning tasks, deciding on gains, making plans, checking out, compliance, and more

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Extra info for Bluetooth Low Energy: The Developer's Handbook

Sample text

They require new hardware and firmware in the controller and software in the host. It is therefore not possible to take an existing Bluetooth classic controller or host and upgrade it to support low energy. However, most dual-mode controllers are simple replacement parts for existing Bluetooth classic controllers. This allows designers of cell phones, computers, and other device to replace their existing Bluetooth classic controllers with dual-mode controllers very quickly. Because it does not support Bluetooth classic, a Bluetooth low energy single-mode device cannot talk with the existing Bluetooth devices, but it can still talk with other single-mode devices as well as dual-mode devices.

This keeps the slave very simple and therefore low cost, low memory, and using the lowest possible power. At the Attribute Protocol Layer, the two types of devices are called client and server. The server holds data and the client sends requests to the server for this data. The server, like the slave at the Link Layer, just does what it is told. The client has the hard job of working out what data the server has and how to use it. Even the security architecture for low energy is asymmetric. The security architecture works on a key distribution scheme by which the slave device gives a key to the master device for it to remember.

This is a model that organizes the information in a server into services. These services can be discovered, interacted with, and used with known semantics. This means that the services have a defined behavior that will always produce the same result, given the same preconditions. This paradigm is the foundation of the most highly successful Internet systems, such as SOAP, REST, COBRA, RPC, Web Services, and so on. A way to illustrate this is to relate it to a real-world example. Suppose that you have a package that needs to be delivered to another company quickly.

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Bluetooth Low Energy: The Developer's Handbook by Robin Heydon


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