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Bluetooth
— bluetooth wireless technology is used to directly connect various devices to each other. This is the most popular interface in smart rings: Bluetooth modules can be made very miniature, the communication range even in the earliest versions reaches 10 m, and different generations of technology are mutually compatible in functionality.
Currently, the 5th edition of Bluetooth technology and its subversions have become widespread:
Bluetooth v 5.0. A notable innovation in version 5 was the introduction of additional operating modes of Bluetooth Low Energy (BLE): an increased speed mode (by reducing the range) and an extended range mode (by reducing the speed). The key benefit of these innovations is to improve the overall reliability of communications, increase their range and reduce the number of breaks.
Bluetooth v5.1. Update to revision v 5.0, in which, in addition to general improvements in the quality and reliability of communication, it became possible to determine the direction from which the Bluetooth signal is coming. Thanks to this, the location of connected devices is determined with centimeter accuracy, which has a positive effect on the quality of the wireless connection.
Bluetooth v5.2. The main innovations in this version are security improvements and additional optimization of power consumption in BLE mode.
Bluetooth v 5.3. Among the innovations in version 5.3, we accelerated the process of negotiating a communication channel between the controller and the device, implemented the function of quickly switching between the operating state in a low duty cycle and a high-speed mode, and improved the throughput and stability of the connection by reducing susceptibility to interference. When unexpected interference occurs in Low Energy mode, the procedure for selecting a communication channel to switch from now on has been accelerated.
Bluetooth v5.4. This edition has increased the range and speed of data exchange. Also in Bluetooth v 5.4, the energy-saving BLE mode has been improved. This version of the protocol uses new security features to protect data from unauthorized access, has increased connection reliability by selecting the best channel for communication, and prevents connections from being dropped due to interference.