October 2024
Intermediate to advanced
180 pages
5h 16m
Spanish
book
Primeros pasos con Bluetooth de baja energía
by Kevin Townsend, Carles Cufí, Akiba, Robert Davidson
Content preview from Primeros pasos con Bluetooth de baja energía
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Capítulo 4. GATT (Servicios y características)
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El Perfil Genérico de Atributos (GATT) establece detalladamente cómo intercambiar todos los datos de perfil y de usuario a través de una conexión BLE. A diferencia del GAP(Capítulo 3), que define las interacciones de bajo nivel con los dispositivos, el GATT sólo se ocupa de los procedimientos y formatos reales de transferencia de datos.
GATT también proporciona el marco de referencia para todos los perfiles basados en G ATT (de los que se habla en "Perfiles basados en GATT definidos por SIG"), que cubren casos de uso precisos y garantizan la interoperabilidad entre dispositivos de distintos proveedores. Por tanto, todos los perfiles BLE estándar se basan en el GATT y deben cumplirlo para funcionar correctamente. Esto convierte al GATT en una sección clave de la especificación BLE, porque todos y cada uno de los datos relevantes para las aplicaciones y los usuarios deben formatearse, empaquetarse y enviarse según sus normas.
El GATT utiliza el Protocolo de Atributos (detallado en "Protocolo de Atributos (ATT)") como protocolo de transporte para intercambiar datos entre dispositivos. Estos datos se organizan jerárquicamente en secciones denominadas servicios, que agrupan piezas conceptualmente relacionadas de datos de usuario denominadas características. Esto determina muchos aspectos fundamentales del GATT que se tratan ...
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