How Bluetooth chips transmit information
How Bluetooth chips transmit information
I believe everyone is not very familiar with how Bluetooth chips transmit information? For example, when Bluetooth is turned on on a mobile phone, another device's Bluetooth can be found; How can I listen to music when I connect my headphones? Let me briefly introduce how Bluetooth chips transmit information.
How Bluetooth chips transmit information
1、 Introduction to Bluetooth chips
It is a type of short distance transmission of information that can effectively communicate between mobile communication terminals, as well as successfully communicate with the Internet, thereby enabling faster transmission between these communication devices and the Internet and expanding the path for wireless communication.
2、 Bluetooth chip application scenarios
There are many application scenarios for Bluetooth technology, which can be used to connect and transmit between mobile terminal devices, speakers, homes, and other devices. Bluetooth chip applications are diverse and often encountered in our daily lives.
3、 Bluetooth chip technology principles
1. Master slave device relationship: The Bluetooth chip technology connection needs to be a host device and a slave device. Both devices can only be connected by opening Bluetooth together. When connecting, the host device must search for the surrounding area, initiate pairing, and connect to the slave device. Both parties can then send and receive data.
In theory, a host device can simultaneously connect multiple slave devices for communication. A Bluetooth device can switch back and forth between two roles. Usually, when in slave mode, it waits for the host device to connect. When switching to master mode, it calls other Bluetooth devices. If the device wants to call other devices from master mode, it needs to know the other device's address and password, and after matching, it can call.
2. Call process: The Bluetooth host device initiates a call, first searching for the slave device being searched, finding the Bluetooth slave device that can be connected, and requiring the password of the slave device to be connected. Some devices do not require a password to be connected, which requires the slave device to set a password;
After pairing, both devices will display the paired connection information. If you want to connect to this device again next time, you can connect faster. Devices paired with Bluetooth earphones can also send connection requests as slave devices, and Bluetooth devices for data communication will not initiate calls. After successfully establishing the link, the devices at both ends of the master and slave can perform bidirectional data transmission and voice communication. In communication mode, both parties can disconnect and disconnect the Bluetooth link.
3. Data transmission: One to one data transmission is the most common method in data transmission applications. In the case where two devices have paired information, the host device has pre stored passwords and Bluetooth addresses for the slave device. As soon as both parties open Bluetooth, they can automatically establish a link.
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