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

By Robin Heydon

The First whole advisor to Bluetooth Low power: the way it Works, What it may possibly Do, and the way to use It

 

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

 

Robin Heydon, a member of the Bluetooth SIG corridor of reputation, has introduced jointly crucial details formerly scattered via a number of criteria files, sharing the context and specialist insights had to enforce high-performance operating structures. He first studies BLE’s layout targets, 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 checking out and qualification. this data has enabled the construction of Bluetooth shrewdpermanent and Bluetooth shrewdpermanent prepared units.

 

This consultant is an necessary better half to the reputable BLE criteria records and is for each technical specialist and decision-maker contemplating BLE, making plans BLE items, or remodeling plans into operating systems.

 

Topics Include

  • BLE gadget varieties, layout pursuits, terminology, and center options
  • Architecture: controller, host, functions, and stack splits
  • Usage types: presence detection, facts broadcasting, connectionless versions, and gateways
  • Physical Layer: modulation, frequency band, radio channels, energy, tolerance, and diversity
  • Direct attempt Mode: transceiver checking out, interfaces, and HCI
  • Link Layer: country computer, 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, companies, features, and protocols
  • Security: pairing, bonding, and information signing
  • Generic entry Profiles: roles, modes, tactics, defense modes, info ads, and prone
  • Applications, units, providers, profiles, and peripherals
  • Testing/qualification: beginning tasks, settling on positive aspects, making plans, checking out, compliance, and more

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Additional resources for Bluetooth Low Energy: The Developer's Handbook

Example text

This data can be anything, the current weather in Kona, Hawaii, the time of the next train from Seoul to the airport, or just some inane chatter between friends. The client, on the other hand, doesn’t have any data. It just sends requests to servers. Once it receives the replies from a server, it can carry out the task it was assigned to do, such as display information to the user or notify the user that somebody they know has posted something on a wall or tweeted. The main benefit of the client-server architecture is this defined split between the client and the server.

It covers the concepts and details behind the main protocol used to expose attributes of a device. It also covers the security models and how to make connections and bonds, or associate, two devices with one another. In Part IV, you wrap up all the details by looking at the design considerations that a product or application developer needs to consider. It starts by looking at the issues involving central devices. Next, it looks at issues related to peripheral devices. Finally, it considers the entire problem surrounding testing and qualification, typically the final part of any product that will be taken to market.

If you want a low-power system, you must keep the transmitted power as low as possible to reduce the energy used to transmit the signal. Similarly, you must keep the receiver sensitivity fairly high to reduce the power required to pick up the radio signals of other devices from amongst the noise. What short range means in this context is really that it is not centered around a cellular base station system. Short range means that Bluetooth low energy should be a personal area network. The original Bluetooth design goal of low power hasn’t changed that much, except that the design goals for power consumption have been reduced by one or two orders of magnitude.

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