The Bluetooth host is the one that can search for others and actively establish a connection. The slave cannot actively establish a connection, but can only wait for others to connect itself. The master-slave integration means that it can switch between the host and slave modes.
The main transparent transmission protocol of the Bluetooth low energy module is designed for the secondary transparent transmission protocol of the low energy Bluetooth module. Through this protocol module, the mobile phone device can be replaced with the secondary transparent transmission protocol module to realize the transparent transmission function or the direct drive control function. This protocol module can be used as an auxiliary tool in the development process of the transparent transmission protocol module.
BLE main transparent transmission protocol module (hereinafter referred to as MTTM) can work in transparent transmission mode (TTM) or command mode (CM). After MTTM is powered on and started, it is in standby mode (SBM). At this time, it is in an idle state without sleep, and the user needs to control the module to connect to the slave device through the AT command. After successfully establishing a link with the slave device, MTTM will automatically search for the transparent transmission channel of the slave device. If the slave device belongs to the BLE slave transparent transmission protocol module (hereinafter referred to as STTM), MTTM will enter the transparent transmission mode by default, otherwise it will enter the command mode by default.
In the transparent transmission mode, the user CPU can communicate with STTM through the general-purpose serial port of the module. The data input from the serial port of MTTM will be forwarded to STTM and output from the serial port of STTM; the data input from STTM will be forwarded to MTTM and output from the serial port of MTTM, so as to realize the transparent transmission function, and the specific meaning of user data is determined by the upper layer application Define yourself.
Selection of master and slave devices:
I have a bluetooth slave or a master bluetooth, how to choose the corresponding module? As long as the slave module and the master module have the same protocol, they can communicate!
As a professional manufacturer of low power Bluetooth module, Tecksay has independently developed and produced a number of BLE Bluetooth modules that have been applied to many industries. With more than ten years of industry experience, Tecksay can customize BLE embedded solutions for customers from design, project management, function customization, system development and other aspects.
