Service equipment discovery method based on Bluetooth GAP layer

Abstract

The invention discloses a service equipment discovery method based on a Bluetooth GAP layer. An equipment filter module is arranged in an equipment discovery program of the Bluetooth GAP layer in advance so as to receive a filter condition input by a user; the method comprises the following steps: acquiring broadcast data of service equipment; extracting effective broadcast information for the scanned service equipment, and saving the effective broadcast information in an equipment information table; filtering the equipment information table according to the input filter condition, and displaying a filter result; adding the corresponding equipment address in the completely filtered equipment information table in a white list; acquiring the service information of the equipment through active scanning, and storing the service information. Only the service equipment meeting the condition and the information thereof are stored, the memory space is saved, an upper application program equipment discovery operation is simplified, and the equipment discovery efficiency is improved.

Description

Technical field [0001] The present invention relates to the technical field of low-power Bluetooth communication, in particular to a service device discovery method based on the low-power Bluetooth GAP layer. Background technique [0002] At the beginning of the design of the Bluetooth low energy protocol, considering the actual application requirements, an asymmetrical architecture was adopted, with the purpose of making devices with less energy burden less things. In practical applications, this asymmetry is reflected in the fact that peripheral service devices generally only send broadcast data and are in a broadcast state, and cannot initiate a connection actively; the central device can scan for peripheral devices, and can ask the broadcaster for more through active scanning Information, only initiate a connection when necessary. One of the results of this asymmetrical architecture is the "one-to-many" topology of Bluetooth low energy, such as figure 1 Shown. Bluetooth Low...

AI Technical Summary

Problems solved by technology

Therefore, work such as device information storage and device selection is left to upper-layer applications or users, which brings additional storage space and time consumption, and increases the difficulty of development

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