Trabajo General Arquitectura de Hardware.
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HARDWARE ARCHITECTURE
In engineering, hardware architecture refers to the identification of a system’s physical components and their interrelationships.
![HARDWARE ARCHITECTURE]https://en.wikipedia.org/wiki/Hardware_architecture
Inteligent Classroom before a Inteligent City
We think that we need a clever Classroom before think on a clever City.
A short range, ultra-low power consuming wireless technology.
Shares the “Bluetooth” name, but has different design goals in mind.
Power Consumption
Years, not hours or days.
Short range
About 50m
Packet-based
- BLE is a “star” topology network
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The Stack
- Controller
- Host
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Logical Link Control and Adaptation Protocol (L2CAP)
- MTU
- Channel Management
- Connection parameter updates
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Maximum Transmission Unit (MTU)
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Security Manager Protocol (SMP)
- Pairing
- Authentification
- Bonding
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Generic Access Profile (GAP)
- Device Discovery
- Link Establishment
- Link Management
- Link Termination
- Initiation of security features
Attribute Protocol (ATT)
- A handle (address)
- A type
- A set of permissions
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Central vs Peripheral
centravsperi _ ====
Generic Attribute Profile (GATT)
_ ====
Intervals
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Connection-less
Devices do not need to maintain connections.
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Interval
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Pairing
Security
Devices pair, keys are distributed, and the connection is encrypted.
Encryption is AES-128.
Two kinds of services
There are primary services and secondary services.
Services can contain other services. (Nested services)
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Profiles
Profiles define roles for devices to play.
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Profiles & Services
Profiles contain services. Services can be contained by multiple profiles.
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Anatomy of a Peripheral
Aplication
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D3 Library
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Bleno Library
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