How to use Bluetooth

First, establish the pairing relationship between the mobile phone and the vehicle-mounted Bluetooth device. Turn on the Bluetooth function of the mobile phone and the vehicle-mounted Bluetooth device respectively, and set the Bluetooth of the mobile phone to "visible to all" or search or turn on detection;

2. Search for Bluetooth devices in your mobile phone, and select the pairing connection after finding them. If prompted to enter the pairing password, enter the pairing password: 0000 (some Bluetooth pairing passwords are: 1234), and the connection is successful after pairing.

3. After the car Bluetooth is successfully connected with the mobile phone Bluetooth, you can make and receive calls on the car Bluetooth; Play music on your mobile phone and enjoy music on your car Bluetooth device.

Extended data:

Communication connection

A Bluetooth master device can communicate with at most seven devices in a piconet (a temporary computer network using Bluetooth technology), although not all devices can reach this maximum. Devices can change roles through protocols, and slave devices can also be changed into master devices (for example, headphones initiate a connection request to a mobile phone, and naturally the master device is the initiator of the connection, but it may run as a slave device later. )

Bluetooth core specification provides two or more piconet connections to form a distributed network, so that specific devices can automatically play the roles of master and slave respectively in these piconets.

Data can be transmitted between the master device and other devices at any time (except the rarely used broadcast mode). The master device can select the slave device to access; Usually, it can quickly switch between devices in a rotating way. Because it is the master device that chooses the slave device to access, theoretically, the slave device should stand by in the receiving slot, and the burden of the master device is less than that of the slave device. The master device can connect with seven slave devices, but it is difficult for the slave devices to connect with more than one master device. The specification is vague about the behavior requirements in the scattering network.

Many USB Bluetooth adapters or "dongles" are available, some of which also include an IrDA adapter.

References:

Bluetooth-Baidu encyclopedia