Melt Pressure Sensor,Sand Melt Pressure Transducer,Gefran Melt Pressure Sensor,Pressure Transducers Xiaogan Yueneng Electronic Technology Co., Ltd. , https://www.xgsensor.com
Mentioned Bluetooth, I believe that everyone will not be unfamiliar with this word. Bluetooth is the most common wireless transmission in current smart devices. It was a very fashionable word a few years ago. After so many years of evolution, Bluetooth technology has changed from 1.0 paper to an indispensable wireless module.
According to the official explanation, the inventor of Bluetooth is Sweden Ericsson, which started research and development as early as 1994. By February 1998, a global small company was established by Ericsson, Nokia, IBM, Toshiba and Intel. Range wireless communication technology, which is now Bluetooth.
Why is Bluetooth named? This stems from a small story. In the tenth century, there was a king in Denmark called Harald Blatand, who was very sociable and sociable. He unified Norway, Sweden and Denmark. Because he likes to eat blueberries, his gums are often blue, so he is known as the King of Bluetooth. The designer felt the name "Bluetooth" very expressive when determining the name, and King Blatand's personality fits the characteristics of this technology, so the name "Bluetooth" is used. The Bluetooth logo is designed from the letters of the "H" and "B" Bluetooth logos in the Harald Bluetooth name. It is represented by the Nordic alphabet. By combining the two, it becomes the Bluetooth logo.
Why choose Bluetooth?
Compared with other wireless technologies: infrared, wireless 2.4G, WiFi, Bluetooth has many advantages such as perfect encryption, stable transmission process and rich compatible devices. Especially in today's gradual reduction of the authorization threshold, Bluetooth technology has begun to really spread to all digital devices. However, Bluetooth is not perfect, and from 1.0 to 4.0 is an extraordinary process.
Although it is Bluetooth 4.0, Bluetooth has evolved through six versions: Bluetooth 1.1, Bluetooth 1.2, Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0; 1.1 is the earliest version of the Bluetooth communication protocol, slightly experimental The nature, because it is not particularly perfect, is relatively easy to cause interference, etc., which will affect the communication quality, Bluetooth 1.1 data transmission volume is also relatively low.
When it comes to Bluetooth 2.0, there seems to be some big changes. First of all, Bluetooth 2.0's transmission speed has been increased to about 2M / S, and supports duplex work, can transmit data and voice signals simultaneously. However, Bluetooth 2.0 can be considered a bad time: although Bluetooth 2.0 has appeared, most of the mobile phones are still integrated with the Bluetooth 2.0 transmitter, which leads to compatibility problems, so there is no large-scale Popularization; in addition, this is why Bluetooth is not easy to match.
So far, the most contacted we have is Bluetooth 2.1+EDR and the latest Bluetooth 4.0. The former of these two technologies should be said to play a role in laying the popularity of Bluetooth, while the latter is a real hope for Bluetooth enthusiasts.
The advantage of Bluetooth 2.1+EDR is to ensure the bandwidth transmission of the data stream based on the stereo transmission. It greatly improves the data transmission rate of Bluetooth technology , reaching 2.1Mbps, which enables the Bluetooth audio device to perfectly display the music traffic data. . To this day, Bluetooth 2.1+EDR is still the Bluetooth device standard with the largest number of devices.
What does the Bluetooth 4.0 era bring to us?
There are currently three versions of Bluetooth 4.0: low power; standard mode; and high speed mode. Among them, low power consumption will be the biggest advantage of Bluetooth in the future. Increasing the battery life of Bluetooth devices under the condition of ensuring low power consumption will undoubtedly improve the user experience. At the same time, the introduction of Bluetooth technology intelligence standards makes Bluetooth no longer just as simple as transferring files.
The "Bluetooth Smart Ready" version has excellent compatibility for any Bluetooth 4.0 device and it has the ability to search for other devices.
The "Bluetooth Smart" version is a device that applies to a single message such as a pedometer or heart rate tester, further reducing power consumption.
The "standard Bluetooth" version is very different from the previous Bluetooth version, only the improvement in transmission speed and power consumption.
Written in the end: The evolution of Bluetooth technology can be said to be a microcosm of the evolution of wireless technology, from 1.0 to 4.0, from drawings to popularity, there are countless bumps in this process, but with the user experience and the support of the entire industry, Bluetooth is in many wireless There is a reason for the emergence of technology. From the current point of view, the future of Bluetooth audio technology is the most impressive, we also hope that major manufacturers can join the Bluetooth wireless, making wireless audio products popular.
Bluetooth technology 1.0-4.0 standard analysis
[Audio Network Information]