Bluetooth module HC-06

It enables devices to communicate wirelessly using the Bluetooth Serial Port Profile (SPP).
This module operates as a slave device, meaning it can only be connected to by a master Bluetooth device.
Key features and functionality:

Bluetooth Protocol: Bluetooth Specification v2.0+EDR

Frequency: 2.4GHz ISM band

Modulation: GFSK (Gaussian Frequency Shift Keying)

Emission power: ≤4dBm, Class 2

Sensitivity: ≤-84dBm at 0.1% BER

Speed: Asynchronous: 2.1Mbps (Max) / 160 kbps, Synchronous: 1Mbps/1Mbps

Security: Authentication and encryption

Power supply: +3.3VDC 50mA

Working temperature: -20 ~ +75 Centigrade

Default Baud Rate: 9600, Data bits:8, Stop bit:1, Parity:No parity

Signal coverage: up to 10m

The HC-06 module is commonly used to establish wireless communication between microcontrollers (like Arduino), computers, and other Bluetooth-enabled devices.
It simplifies the process of adding Bluetooth connectivity to projects by providing a simple serial interface.
Configuration of the module (e.g., changing the baud rate, Bluetooth name, or PIN code) is typically done using AT commands sent through the serial interface.