Latest Events
Contact Us
Shenzhen Yasi Technology Co., Ltd. is a modern enterprise management enterprise integrating development, production and sales. Our products have...
Contact Now
Latest News

How to choose a good quality bluetooth speaker

TheBluetooth speaker has swept the entire audio market with its lightning speed.With the fierce competition in the Bluetooth speaker market, variousdi...

HKTDC Gifts & Premium Fair 2019

1.HKTDC Gifts & Premium Fair 2019 Booth No. :3G-B07 Time: 27th Arpil- 30th/April, 2019 Address: Hongkong COnvention Exhibition Centre, 1 Expo Drive, ...

HKTDC HK Electronics 2019 (Spring Edition)

HKTDC HK Electronics 2019 (Spring Edition) Booth No. 3E-C28 Time: 13th April-16th April, 2019 Address: Hongkong Cnvention Exhibition Centre, 1 Expo ...

The Unbearable noise

Have you ever encountered such a situation,whether you listen to music or watch a movie, the speaker will make some noise,and even do nothing, as long...

2018 Antumn Electronics Edition in Wanchai, Hong Kong

As we all know, Autumn Electronic Products Fair and International Electronic Components Fair in Wanchai, Hong Kong Trade and Development Council, 2018...

How to choose noise reduction headphones/ Earphones

Noise pollution has become more and more important. Business trips, daily trips, or work environments seem to make noise aside when we fall asleep. Si...

How to choose your own mini speaker

There are many people who originally bought the sound of blindly catching the tide and quickly found outdated and awkward to use, but because they did...

Material that affects the speaker quality

The mainparts of the speakers are the speakers, so what are the materials that affectthe sound quality of the speakers?There are several points to be ...
Bluetooth headset
Your position:  Home > News > newclass > Working principle of the bluet.....


Working principle of the bluetooth

  • Author:James
  • Source:
  • Release Date:2017-04-10

Bluetooth is a radio technology that supports short-distance communication of equipment, power level CLASS1 100 meters distance and CLASS2 10 meters distance two. Can be in the mobile phone, PDA, wireless headset, notebook computers, peripherals and other devices between the wireless information exchange. Bluetooth standard is IEEE802.15, work in the 2.4GHz band, bandwidth up to 3Mb / s. Mobile phones, PDA, GPS Bluetooth, headphones, notebook built-in Bluetooth and other general CLASS2 10 m power level, industrial applications with 100 meters more Bluetooth. Bluetooth technology specifications developed by the Bluetooth SIG organization maintenance, there are Bluetooth communication products have a lot.

New LED flash rubik's cube bluetooth.jpg

The master - slave relationship of Bluetooth communication

Bluetooth technology for each pair of devices between the Bluetooth communication, must be a main role, the other from the role in order to communicate, communication, must be found by the main side, initiated pairing, chain success, the two sides that Can send and receive data. In theory, a Bluetooth master device can communicate with seven Bluetooth slave devices at the same time. A device with Bluetooth communication can switch between the two roles, usually working in slave mode, waiting for other master devices to connect, and when needed, convert to master mode and initiate a call to other devices. A Bluetooth device in the main mode to initiate a call, you need to know each other's Bluetooth address, paired password and other information, pairing is complete, you can directly call.

Bluetooth call process

The Bluetooth host device initiates a call, first looking for a Bluetooth device that can be found around it, and the slave device needs to be in a ready state, such as a Bluetooth headset that requires keystrokes to enter a searchable state, Device to find from the end of the Bluetooth device, and from the end of the Bluetooth device to match, then need to enter the terminal device PIN code, the general Bluetooth headset default: 1234 or 0000, stereo Bluetooth headphones default: 8888, there are devices do not need to enter PIN code, such as NSP-228 Bluetooth speakers. After the pairing is complete, the slave device records the trust information of the primary end device. At this time, the master can initiate a call to the slave device. Depending on the application, it may be an ACL data link call or a SCO voice link call. Of the device in the next call, no longer need to re-paired. Pairing the device, as a slave from the Bluetooth headset can also initiate a chain request, but do not communicate with the Bluetooth module does not initiate a call. After the link is established, the master and slave can perform two-way data or voice communication between the two ends. In the communication state, the master and slave devices can initiate a chain break and disconnect the Bluetooth link.

mini bluetooth tube speaker_01.jpg

Bluetooth one-on-one serial data transmission applications

Bluetooth data transmission applications, one to one serial data communication is one of the most common applications, the Bluetooth device in the factory before the two Bluetooth devices in front of the match between the information, the main end of the secondary device from the PIN code, Address, etc., both ends of the device power is automatically built chain, transparent serial transmission, no external circuit intervention. One-to-one application from the end device can be set to two types, one is silent, that is, only with the designated side of the main communication, not by other Bluetooth devices to find; Second, the development of the state, , Can also be found by other Bluetooth devices to build chain.