In today's life, everyone is exposed to wireless connectivity, bluetooth transmission. But bluetooth modules are rare. So what does the bluetooth module do? What are the application scenarios? This article will briefly introduce the function of bluetooth module and common application scenarios.

Bluetooth modules are divided into 1.2, 2.0, 3.0, 4.0, 4.1, 4.2 and 5.0 according to the standards. Usually the latter is compatible with the former; Bluetooth module is divided into classic bluetooth module (BT) and low power bluetooth module (BLE) according to application and support protocol. Classic bluetooth module (BT) : generally refers to the module that supports bluetooth protocol below 4.0, generally used for the transmission of large data volume, such as: voice, music, high data volume transmission.

Low power bluetooth Module: it is a Module that supports bluetooth protocol 4.0 or higher. It is also called Bluetooh Low Energy Module. The biggest feature is the reduction of cost and power

Bluetooth BLE module as one of the mainstream way of wireless communication, in the development of the Internet of things has played a vital role, its low energy consumption, high safety, can ad-hoc network characteristics, make its will no doubt become a portable devices or between devices at close range of the perfect replacement cable communication, BLE bluetooth technology USES the same with the traditional technique of bluetooth adaptive frequency hopping (AFH) technology, which can ensure low power consumption of the bluetooth in the residential, industrial and medical applications "noisy" rf environment to maintain the stability of the transmission. In order to minimize the cost and power consumption of using AFH, low-power bluetooth technology has reduced the number of channels from 79 1mhz wide channels of traditional bluetooth technology to 40 2mhz wide channels. Compared with traditional bluetooth technology, low power bluetooth technology adds a new function is "broadcast" function. With this feature, the slave can tell it needs to send data to the master. Therefore, bluetooth BLE module is widely used in various household appliances, instruments, instruments, car, industrial control, medical care, health care, consumer electronics and other electronic products.

Product recommendation-1

E104-2g4u04a is a very small bluetooth wireless module USB (pin spacing 1.27mm) designed and produced by chengdu yibai technology co., LTD. The module comes with a high-performance PCB onboard antenna, and USES bluetooth low energy consumption (BLE) SOC solution. Suitable for bluetooth low energy application. It enables a powerful BLE master or slave node to be built at a very low total bill of materials cost. E104-2g4u04a adopts CC2540 rf chip imported by Texas instruments (TI) company. The chip is integrated with 8051 single chip microcomputer and wireless transceiver. It is suitable for BLE protocol and supports BLE4.0 protocol. Module to elicit all microcontroller IO port, integrated DMATIMERSADCUSARTI2CWDTCOMP these rich peripherals, for all-round development.

E104-2g4u04a is a hardware platform, leaving the factory without programs. Users need to conduct secondary development.

Product recommendation -2

E104 - BT01

E104-bt01 is a small size bluetooth module designed and produced by ebaxter

Foot spacing 1.27mm), with a high-performance PCB onboard antenna, bluetooth low energy consumption (BLE)

SOC solution. E104-bt01 adopts CC2541 radio frequency chip imported by Texas instruments (TI) company, and the chip is integrated with 8051 single chip microcomputer and wireless transceiver, supporting the standard BLE4.0 protocol. Module to elicit all microcontroller IO port, integrated DMATIMERSADCUSARTI2CWDTCOMP these rich peripherals, for all-round development.

E104-bt01 is a hardware platform, leaving the factory without programs. Users need to conduct secondary development.

Apply example -1

Bluetooth access lock

BLE bluetooth smart lock

On the basis of the original access control system, the network intelligent access lock increases the bluetooth transmission module with low power consumption to realize the bluetooth protocol docking of mobile phones. The smart phone calls the bluetooth service through the APP, sends instructions, and the smart access lock receives bluetooth instructions, so as to control the switch of the smart access lock.

Description of the bluetooth smart lock scheme: the BLE bluetooth module is built into the smart lock. The mobile phone reads the bluetooth information of the smart lock through the APP, tries to pair, and sends the unlock request to the server.

Apply example -2

Bluetooth anti-loss device

Built-in bluetooth module lost; preventer low power consumption by using anti lost proprietary software, and the mobile phone mobile devices such as bluetooth connectivity, users will be easy to lose goods (expensive handbag, key), and other valuables in physics, when objects after a certain distance away from mobile phones and mobile phone will receive alarm, in addition to the bluetooth through calling the bop lost, looking for through the voice of the bop lost.