Internet of Things Connectivity - Bluetooth, Bluetooth History
The Internet of Things is developing rapidly. It is predicted that the number of networked devices will reach 75 billion by 2020, and the interconnection between devices will become a key issue. Bluetooth technology has been widely used as a short-range wireless communication technology. The Bluetooth standard has also evolved from 1.0 to 5.0. Both the speed, the operating range, and the stability have been greatly improved. So, can Bluetooth technology become the connectivity of the Internet of Things?
Bluetooth Technology Principles, Protocols and Development History
Bluetooth technology was originally created by Ericsson. The technology began with Ericsson’s 1994 plan, which is a study of low-power, low-cost wireless communication connections between mobile phones and other accessories. The inventor hopes to create a set of unified rules (standardized protocols) for communication between devices to solve incompatible mobile electronic devices among users.
Bluetooth wireless technology works in the license-free 2.4 GHz ISM band, using 1600 hop/s fast frequency hopping technology, forward error correction coding (FEC) technology and FM modulation. The equipment is simple, supports point to point, point Multipoint communication.
Market Prospect and Application of Bluetooth Technology
According to research data, by 2020, the equipment connected to the Internet of Things will reach 75 billion units. The interconnection between these products is real-time and long-lasting. Some of them require years or even decades. To achieve this interconnection, ultra-low power consumption becomes a key element of the Internet of Things. Bluetooth technology, Zigbee, and Wi-Fi are the three mainstream wireless connection technologies. Bluetooth is known for its peer-to-peer ultra low power consumption. Zigbee is known for its low power consumption and the MESH ad hoc network, while Wi-Fi is transmitted in the big data high band. Known. Bluetooth technology will undoubtedly become an important link for the connection of the Internet of Things.
Many companies are optimistic about the application of Bluetooth technology in the field of Internet of Things. According to He Genfei, director of the Bluetooth technology alliance developer program, the number of member companies of the Bluetooth technology alliance has grown rapidly. By the end of 2015, it has exceeded 28,500, an increase of 14% compared to last year. The number of members in the Asia Pacific region is also growing rapidly, with an annual growth rate of 13%.
Bluetooth Technology Design Tips
Standard Bluetooth technology is a "connection-oriented" wireless technology with a fixed connection time interval, making it ideal for mobile phones to connect to high-activity connections such as wireless headphones. In contrast, Bluetooth low energy technology uses a variable connection time interval, which can be set from a few milliseconds to a few seconds depending on the application.
Bluetooth Solution and Application
Bluetooth technology can wirelessly connect desktop and notebook computers, portable devices, PDAs, mobile phones, camera phones, printers, digital cameras, headsets, keyboards, and even computer mice over short distances.
Bluetooth technology has long been widely used in various fields. From the current point of view, Bluetooth in the smart home, wearable, audio and other fields have a greater advantage.
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