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What are Bluetooth Modules?

Bluetooth modules are compact electronic devices that enable wireless communication between electronic systems. They utilize Bluetooth technology to establish a reliable and efficient connection for data exchange between devices, making them integral components in various applications, from serial communication to audio transmission.

Price of Bluetooth Modules:

Bluetooth module prices vary depending on factors such as brand, features, and capabilities. Entry-level modules like the HC-05 and HC-06 are budget-friendly, while advanced modules with additional functionalities, such as audio transmission, may have a higher price point.

Tips for Buying Bluetooth Modules:

Consider the intended application and required features when selecting a Bluetooth module. Pay attention to factors like range, data transfer rate, and compatibility with your devices. Modules supporting the latest Bluetooth versions may provide enhanced performance and energy efficiency.



Popular Models of Bluetooth Modules:

  • HC-05 Bluetooth Serial Wireless Module: Widely used for serial communication, offering versatility and ease of use.
  • HC-06 Bluetooth Serial Wireless Module: Similar to HC-05, with a focus on simplicity and cost-effectiveness.
  • SPP-C Bluetooth to Serial Adapter Module: Facilitates seamless Bluetooth-to-serial communication in various electronic projects.
  • AT-09 CC2541 Bluetooth V4.0 Serial Wireless Module: Integrates Bluetooth 4.0 technology, ideal for low-power applications.
  • DX-BT18 Serial Bluetooth Module - Supports SPP2.0/BLE4.0: Combines support for traditional SPP with Bluetooth Low Energy (BLE) for versatile connectivity.
  • CSR V4.0 USB Wireless Bluetooth Dongle: USB dongle for adding Bluetooth functionality to devices like computers or laptops.
  • Bluetooth Wireless Audio Transmitter USB Dongle - 3.5mm Input: Enables wireless audio transmission from devices with a 3.5mm audio output.
  • BT04-A Bluetooth Serial Module: Compact module suitable for diverse applications, providing reliable Bluetooth connectivity.
  • XS3868 Bluetooth Stereo Audio Module: Designed for high-quality stereo audio transmission, ideal for audio-related projects.
  • Backplane Adapter Plate for XS3868 Bluetooth Stereo Audio Receiver: Allows easy integration and mounting of the XS3868 audio module into electronic systems.
  • What is the difference between HC-05 and HC-06 Bluetooth modules?

    HC-05 is known for its versatility and supports both master and slave modes, making it suitable for various applications. On the other hand, HC-06 operates primarily in slave mode, making it ideal for simple wireless communication between devices.

    Can I use Bluetooth modules with other microcontrollers besides Arduino?

    Yes, these Bluetooth modules are compatible with various microcontrollers beyond Arduino. They can be integrated into projects involving Raspberry Pi, PIC, and other popular microcontroller platforms for wireless communication.

    Do I need to program the Bluetooth modules, or are they plug-and-play?

    While these modules come with default settings, configuring them for specific applications often requires


    programming. However, many tutorials and libraries are available to simplify the programming process for users with varying levels of experience.

    What is the range of HC-05 and HC-06 Bluetooth modules?

    The communication range of these modules typically extends up to 10 meters in an open environment. Factors like obstacles and interference can influence the effective range of the Bluetooth connection.

    Can I use HC-05 and HC-06 modules for audio applications, such as wireless speakers?

    No, the HC-05/6 only support the SPP (Serial Port Profile), meaning it's designed for text data. For audio (A2DP), you'll need a USB Bluetooth dongle or a board with onboard Bluetooth like Raspberry Pi or ESP32.

    Can I use HC-05 or HC-06 for Bluetooth Low Energy (BLE) applications?

    No, the HC-05 and HC-06 are conventional Bluetooth modules and don't support Bluetooth Low Energy (BLE). If you're looking for BLE functionality, you might want to explore options like the AT-09 or DX-BT18.

    BLE vs Bluetooth.jpg