Ble Low Power Bluetooth networking process and Bluetooth role introduction

Bluetooth role and networking establishment

Knowledge card —— Bluetooth role and networking establishment

BLE Bluetooth has the following roles ：

role	explain
Broadcaster （Advertise）	Periodically broadcast data to surrounding equipment
Scanner （Scanner）	You can listen to broadcast data or search for surrounding devices （ also called ：Scanner）
Main equipment （Master)	Responsible for scanning equipment and initiating establishment request , After the connection is established, it becomes master
Slave device （Slave）	The device responsible for broadcasting and receiving the connection request is called after the connection is established slave

• Bluetooth communication refers to the communication between two Bluetooth modules or Bluetooth devices , One of the two sides of data communication is the host , One is the slave .
• The difference between master mode and slave mode ： A host is a party that can search for others and actively establish a connection , The slave can't actively establish a connection , We can only wait for others to connect with us

From device mode ：

The Bluetooth module working in the slave mode can only be searched by the host , Can't actively search . After the slave device is connected to the host , It can also send and receive data with the host device

Master mode ：

1. Working in master mode , Can be connected to a slave device . In this mode, you can search the surrounding devices and select the slave devices to be connected .
    
2. A Bluetooth host device , It can communicate with multiple Bluetooth slave devices at the same time .
    
3. A device with Bluetooth communication function , You can switch between two characters , Usually work in slave mode , Wait for other master devices to connect , When needed , Switch to main mode , Initiate calls to other devices .
    
4. When a Bluetooth device initiates a call in main mode , Need to know each other's Bluetooth address , Pairing password and other information , After pairing , Call can be initiated directly .

Connection process

Broadcast from device , The master device scans and then initiates a connection , Establishing a connection

The knowledge card is over ~ Do you know anything about Bluetooth network setup ？

Bluetooth module practice

Take the master-slave Bluetooth of Shenzhen xinchida as an example

1. Document preparation

      With the master-slave Bluetooth of Shenzhen xinchida 52832 and bg22x For example

• Centrida Low Power Bluetooth (BLE) Modules and protocols (nRF52832)
• Centrida Low Power Bluetooth (BLE) Modules and protocols (EFR32BG22)

2. Role settings

You can see that there are 4 Introduction to modes :
0：slave, From the role （ Default character ）
1：master, The main character
2：slaveandmaster, Master slave integration
3：beacon, Can be connected to the broadcast （ In this role, the serial port is closed , No name ）
 

3. Module introduction

 

This document is from the official of Sinochem ！ When reading this tutorial , About AT Please refer to this document for a detailed description of the instructions ！

If you need Bluetooth (BLE) module

Can contact ： Shenzhen Xinchi daliai

Xinchida technology 【Vivi】
contact number ：13510534054 （ WeChat ）/17806715121
 
More information plus v Or the official website ：
https://www.szrfstar.com/