1. Bluetooth devices use radio waves to connect cell phones and computers. Bluetooth products contain a small Bluetooth module as well as a Bluetooth radio and software to support the connection. When two Bluetooth devices want to communicate with each other, they need to be paired. Communication between Bluetooth devices takes place in a temporary network of short-range (known as a pico network, which refers to a network of devices connected using Bluetooth technology).
The different "categories" of Bluetooth technology
There are actually multiple "categories" of Bluetooth technology, i.e. different versions of the core specification. The most common are Bluetooth BR/EDR (i.e., Basic Rate/Enhanced Data Rate) and Bluetooth Low Energy (Bluetooth Low Energy) technologies. Bluetooth BR/EDR is mainly used in Bluetooth version 2.0/2.1, and is generally used in products such as speakers and headsets; while Low Energy Bluetooth technology is mainly used in Bluetooth version 4.0/4.1/4.2, and is mainly used in the latest products on the market, such as bracelets, and other devices. The low-power Bluetooth technology is mainly used in Bluetooth version 4.0/4.1/4.2, which is mainly used in the latest products on the market, such as bracelets, smart home devices, automotive electronics, medical devices, and Beacon sensors (small transmitters that send data via Bluetooth technology).
Extended information:
Bluetooth (?Bluetooth?): a wireless technology standard that enables short-range data exchange (using Bluetooth technology) between stationary and mobile devices, as well as in-building personal area networks. short-range data exchange between fixed devices, mobile devices and building personal area networks (using UHF radio waves in the ISM band from 2.4-2.485 GHz). Bluetooth technology was originally created by telecommunications giant Ericsson in 1994 as an alternative to the RS232 data line. Bluetooth allows multiple devices to be connected, overcoming the challenge of synchronizing data.
Today Bluetooth is managed by the Bluetooth Special Interest Group (SIG). The SIG has more than 25,000 member companies around the world in a variety of fields, including telecommunications, computing, networking, and consumer electronics. the IEEE classified Bluetooth technology as IEEE 802.15.1, but no longer maintains that standard. The Bluetooth SIG oversees the development of the Bluetooth specification, manages the certification program, and maintains trademark rights. A manufacturer's device must comply with the Bluetooth SIG standard in order to be marketed as a "Bluetooth device". Bluetooth technology has a network of patents that can be issued to devices that comply with the standard.
Reference: