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Bluetooth Protocol Overview and Bluetooth Module

Plate type: Use Cases
Time: 2022.12.26
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These days, the technology known as Bluetooth® is very standard. It is undeniably a proper function, as demonstrated by the fact that it can pair wireless headphones and transfer documents. But are you familiar with the history behind the development of Bluetooth®? 


What is the Bluetooth Module? 

The HC-05 Bluetooth is a network protocol that offers to use and is intended to construct transparent wireless serial connections. It communicates with other devices via a serial protocol, making it simple to interface with controllers or personal computers. 

 

Example of Bluetooth Module

Bluetooth 5.0 module for reduced energy consumption 

The MS88SF21 module is a sophisticated, compact size, extremely configurable, ultra-low energy wireless BLE 5.0/5.1 Module centered on Nordic nRF52840/52833 SoC. It has an optimized & complete radio configuration of 2 available types of antenna: a PCB antenna as well as u. FL(IPEX) connector for an external antenna. 

 

Both of these antennas can be used with the module. The MS88SF2 series brings out all of the features and capabilities of the nRF52840 and nRF52833 hardware. These features and capabilities include USB access, up to +8 dBm transceiver power up to 5.5V supply factors, 802.15.4 (Thread/Zigbee) execution, Bluetooth 5 Long Range Feature & stringent security abilities. 


Technologies Based on Bluetooth

The BLE modules describe a wireless networking protocol that transmits data through radio waves. It can communicate with a multitude of different devices all at once and does so without the need for an interface. It is an open system for the data transmission voice and the data indicated from spot to spot & multiplier to spot applications. 

 

The Bluetooth protocol stack layers of the gross data rate are one bit per second, while the speed of the 2nd gen can reach up to two bits per second. A maximum of 723 kilobits per second can be transferred during a one-to-one Bluetooth connection. This is the maximum speed that is allowed. During standby, the power consumption is only 0.3 ma, while the mode itself uses very little power. 

Wireless point-to-point & point-to-multiple device connections can be made using Bluetooth in a Piconet. 


How Does the Bluetooth® Technology Work? 

To comprehend how Bluetooth works diagram, it is necessary to learn about the Bluetooth network; this mechanism enables devices to communicate with one another and share data. 

 

It employs a system that is both point-to-point and point-to-link. One way to think about it is serial communication, with the Master-Slave relationship being used. 

 

In point-to-link configurations, it behaves more like a network than anything else. The diagram demonstrates that the central server is able to establish connections with more than one slave device. On the other hand, slave devices can only connect to a single master device at any given moment. Seven is the highest amount of slave devices that are connected to a master device at once. 


Protocol Stacks for Bluetooth® Technology 

The primary role of Bluetooth® is the creation of Bluetooth layers and a protocol stack, which makes it possible for Bluetooth® to operate, stop and function over other programs. The following is a list of several protocols: 

Core Protocols: 

Bluetooth®, radio, Cellular modem, Link Manager Protocol (LMP), Logical Link Control & Adaptation Protocol (L2CAP), as well as Service Discovery Protocol, are all components of this system (SDP). (Standard) 

Adopted Protocols:

The Point-to-Point Protocol (PPP), the Internet Protocol (IP), the User Datagram Protocol (UDP), the Transmission Control Protocol (TCP), as well as the Wireless Application Protocol, are all components of it (WAP). (Adapted from the standard model) 

 

Cable Replacement Protocol: 

It comes with the RFComm protocol, which stands for radio frequency communications. Radio Frontend Component is what the abbreviation stands for. (it also offers a serial port with the Bluetooth protocol stack

AT commands:

First, let's have a look at some of the Core Protocol's functions: 

Radio: 

The protocol is equivalent to the physical layer that lays out the structural properties and requirements for the propagation of radio waves. 

The Link Manager Protocol, or LMP, is as follows: 

Creates logical connections between Bluetooth® devices & continues to maintain such connections to enable communication between the devices. 

 

SDP stands for the Service Discovery Protocol:

Responsible for handling service-related questions such as requests for device information to facilitate the establishment of a connection between competing Bluetooth® devices. 

 

Baseband: 

 

The organization utilizes radio protocol services. 

 

The Logical Link Control & Adaptation Protocol, or L2CAP, entails the following: 

 

It provides adaptation between the frame format of the top layer and the frame format of the baseband layer. 

The Bluetooth® Protocol's Possible Applications 

 

The following are some examples of how the Bluetooth® Protocol can be used in real life: 

 

Automobiles such as the Toyota Prius and the Lexus were initially released in the year 2004. The installation of 430 frequency free call systems took place. 

Communication by wireless means with the input & output devices of a personal computer; the most typical devices are a mouse, a keypad, and a printer. 

 

FAQ 

What Exactly is the Protocol of the Bluetooth System? 

 

Point-to-Point Protocol (PPP), Internet Protocol (IP), User Datagram Protocol (UDP), Transmission Control Protocol (TCP), & Wireless Application Protocol are the generally adopted protocols that are utilized in Bluetooth (WAP). 

 

What are the many kinds of Bluetooth modules that are available? 

 

In biomedical applications, several Bluetooth modules are utilized, including HC-05, HC-06, RS 232: TTL, BLE link Bee, BLE small, Blue SMiRF, Bluetooth friend, JY-MCU, ITEAD BT, and others. The HC-05 is the Bluetooth module utilized the most frequently out of all the available modules. 

 

What makes up the Bluetooth module's components? 

 

This has three components: an Android device (also known as a smartphone), a Bluetooth protocol standard, and an Arduino. These components are linked together in a serial fashion to communicate with one another.