Bluetooth Wireless Technology
Introduction
Since Bluetooth was officially launched in 1999, it has now become a fairly popular and widely used short-range wireless communication technology. Due to its low power consumption, low cost, diversified product applications, high compatibility, and ease of use, Bluetooth has gradually developed into one of the mainstream technologies for wireless communication between a few meters to a hundred meters.
The Bluetooth that everyone knows today is actually divided into two specifications: traditional Bluetooth and low-power Bluetooth (BLE) since version 4.0. The latest Bluetooth standard has been developed to version 5.2. It is estimated that 99% of mobile phones , Laptops, tablets and other mobile devices will have built-in Bluetooth functions. In addition, more and more wearable devices, smart home equipment, automotive and medical equipment, and even IoT applications are also using Bluetooth communication. In order to transmit communication technology, it can be seen that Bluetooth has gradually become ubiquitous around our lives, and has silently changed many of our living habits.
Standard
The Special Interesting Group (SIG) of the Bluetooth Technology Alliance has launched the Bluetooth 4.0 specification, which increases the transmission distance to more than 100 meters, and subdivides the Bluetooth communication protocol into “Bluetooth Low Energy” (Bluetooth Low Energy, BLE). ), “Classic Bluetooth” (Classic Bluetooth) and “High Speed Bluetooth” (High Speed Bluetooth) three modes, defined by different communication standards:
- Bluetooth 3.0+EDR
- Bluetooth 3.0+HS
- Bluetooth 4.0/4.1/4.2
- Bluetooth 5.0/5.1/5.2
Application
Architecture
