When it comes to wireless communication in the realm of electronics and Internet of Things projects, Bluetooth modules have become essential components. The HC-06 and HC-05 modules are two well-liked options for Bluetooth connectivity. We'll contrast these two modules in this post to assist you in selecting the best one for your needs.

HC-06 Bluetooth Module


Primarily, the HC-06 Bluetooth module functions as a slave module. It is intended to be an easy-to-use and reasonably priced way to give your projects Bluetooth functionality. Enabling serial communication with devices like microcontrollers is a common use for the HC-06.

Key Features:

  • Slave-only module.
  • Easy to use and set up.
  • UART (Universal Asynchronous Receiver-Transmitter) interface for communication.
  • Limited configuration options.
  • Ideal for simple projects that require basic wireless communication.


  • Simplicity: The HC-06 is straightforward to use, making it a great choice for beginners.
  • Cost-Effective: It's budget-friendly and provides a wireless solution without breaking the bank.


  • Limited Flexibility: Due to its slave-only nature, it can't initiate connections.
  • Limited Configuration: There are fewer configuration options compared to the HC-05.

HC-05 Bluetooth Module

Overview: The HC-05, on the other hand, is a versatile Bluetooth module that can operate as both a master and a slave device. This flexibility opens up a wider range of applications and project possibilities.

Key Features:

  • Master-slave capability.
  • UART interface for communication.
  • Extensive configuration options for various modes.
  • Enhanced AT commands for more control.
  • Suitable for a broad range of applications.


  • Flexibility: The HC-05 can operate in both master and slave modes, allowing it to initiate connections.
  • Versatility: It offers more configuration options, making it suitable for a wide array of projects.


  • Slightly more complex to configure for beginners.
  • A bit more expensive compared to the HC-06.

Which One to Choose?

HC-06 is an excellent choice if you need a straightforward Bluetooth module for simple projects, especially if you don't require the ability to initiate connections. It's user-friendly and budget-friendly.

HC-05 is the right option if you need more flexibility and advanced features. It's suitable for projects where you need the module to act as both a master and slave, and if you require more extensive configuration options.

In conclusion, the requirements of your project and your level of experience with Bluetooth modules should guide your decision between the HC-06 and HC-05. While the versatility of the HC-05 may appeal to more seasoned users, beginners might find the HC-06 to be a great place to start.

Don't forget to review the individual datasheets and documentation for every module to gain a deeper understanding of its capabilities.