Pairing of Bluetooth Modules
Anudeep Juluru, Shriram K. Vasudevan, T. S. Murugesh · 2022
The applications of Bluetooth are enormous, and they are used only in consumer products but also in industrial applications. Bluetooth is used to transfer data by eliminating wired connections. HC-05 Bluetooth module is an easy-to-use Bluetooth Serial Port Protocol module designed for transparent wireless serial connection. Data mode is sometimes referred to as the trans-receiving mode. It is the default operating mode of the HC-05 Bluetooth module. If the onboard LED is repeatedly blinking, then the HC-05 Bluetooth module is in Data mode and is waiting for another Bluetooth device to pair with it. If the onboard LED is blinking twice in 1 second, then the HC-05 Bluetooth module is in Data mode and is successfully connected to another Bluetooth device. Command mode is also known as AT Command mode or AT mode. AT is the short form of Attention. So, Command mode is sometimes referred to as Attention mode.