AUX line establishes a command line connection between the user and the device; Perform some operations on the device that cannot be completed in user mode, such as initialization, restoring initial configuration, correcting abnormal user mode, etc. The device has a fixed port, which can be used as an ordinary asynchronous serial port, with the highest speed of115200 bit/s. Using AUX interface, it can realize remote configuration of hardware products, line backup and other functions.
As a small-scale wireless connection technology, Bluetooth can realize convenient, fast, flexible, safe, low-cost and low-power data communication and voice communication between devices, and it is one of the mainstream technologies to realize wireless personal area network communication at present. Connecting with other networks can bring more extensive applications. It is a cutting-edge open wireless communication, which enables all kinds of digital devices to communicate wirelessly. It is a wireless network transmission technology, originally used to replace infrared rays.
Although Bluetooth has many advantages, Bluetooth transmission protocols, like other 2.4G devices, all use signals in this frequency band, which will inevitably lead to mutual interference of signals.
In addition, Bluetooth protocol is not a free technology, and any manufacturer who uses this technology must pay the patent fee to the organization, which will also be reflected in the cost. In 20 12 years, the price of Bluetooth audio equipment is still higher than that of ordinary products.
Extended data:
Functions of Bluetooth audio:
1, simple operation: Bluetooth technology is an instant technology, which does not need a fixed infrastructure, is simple to install and set up, and can be connected without cables. It is very convenient to use, can be put into use by simple pairing, and has low operating threshold.
2. Faster transmission speed: Compared with other modes such as infrared, Bluetooth transmission protocol has obvious advantages in speed. The theoretical maximum speed of Bluetooth 4.0 is 24Mbps, and faster speed can ensure higher sound quality, enabling it to carry music with higher bit rate.
3. Moderate transmission distance: The transmission distance of Bluetooth is generally within 10 meter, which is just the size of a room, and it can transmit data through a partition wall, which is very suitable for home environment.
Baidu encyclopedia -AUX interface
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