Bluetooth Module (HC-05)

Want to add bluetooth to your project? This is what you need.
Looking for Wi-Fi instead? Check out



Our kits ship fast from our Warehouse in Parrish, FL and arrive within 2-5 days on average (internatonal may be longer). Excludes pre-orders, apparel, and back order items.

There is a 30 day “love it or your money back” return policy. Warranty on parts is 1-year. See more info here.

Our reviews are primarily on Google Reviews. You can check out (or give us!) our reviews at  :)

Q1.  Are the parts in the kit re-usable? – Yes! Absolutely.
Q2. Will this work with my OS? – We currently support anything that can run the Arduino IDE. This includes ChromeOS, MacOS, Windows, and Linux. For downloads, check out 
Q3. Do you offer Educational/Bulk Discounts? – Yes, we do! Please send us an email at [email protected] with how many you are looking for. We generally respond within 24 hours.
Q4. How do I access the free education with the kit? – Most of our kits kits have a course page at There, you can find sample code, project examples, and everything you’d need to get started.

Want to add bluetooth to your project? This is what you need.
Looking for Wi-Fi instead? Check out

Introducing the HC-05 (ZS-040) Serial to Bluetooth Bridge Module – Your Gateway to Seamless Wireless Communication!

Are you ready to unlock the power of wireless connectivity for your microcontrollers, Android devices, laptops, and desktop PCs? Look no further than the HC-05 (ZS-040) Serial to Bluetooth Bridge Module, a cutting-edge solution that brings the world of wireless communication to your fingertips.

Versatile Wireless Connectivity: The HC-05 (ZS-040) is your go-to module for establishing robust wireless connections. Whether you need to exchange data between two microcontrollers or create a seamless link between your microcontroller and an Android phone, laptop, or desktop PC with Bluetooth capabilities, this module has you covered. Say goodbye to cumbersome wires and embrace the convenience of wireless data transfer.

Master and Slave Modes: Adaptability is the key to success, and the HC-05 (ZS-040) embodies this philosophy perfectly. It functions as both a master and a slave device, ensuring that it seamlessly integrates into a wide range of applications. Whether you're controlling multiple devices from a central hub or allowing your microcontroller to communicate with external devices, this module effortlessly switches between roles to suit your needs.

Key Features:

  • Highly Reliable Communication: Enjoy stable and interference-free communication with Bluetooth technology.
  • Plug-and-Play Ease: Simple to set up and use, making it accessible even for beginners.
  • Wide Compatibility: Compatible with a variety of microcontrollers and devices with Bluetooth capability.
  • Flexible Configuration: Customize settings to meet your specific requirements, such as baud rate and pairing codes.
  • Compact and Durable: The module's compact design ensures it fits seamlessly into your projects, and its robust build guarantees durability even in challenging environments.

Applications: The HC-05 (ZS-040) Serial to Bluetooth Bridge Module finds applications in a wide array of fields, including but not limited to:

  • Home Automation: Control smart devices and appliances remotely via your Android phone or PC.
  • Robotics: Enable wireless communication between microcontrollers in your robotics projects.
  • IoT Projects: Connect IoT sensors and devices wirelessly for data collection and control.
  • DIY Electronics: Enhance your DIY electronics projects with the convenience of wireless data transfer.
  • Industrial Automation: Streamline industrial processes with reliable wireless communication.

Unleash the power of wireless communication with the HC-05 (ZS-040) Serial to Bluetooth Bridge Module. Say goodbye to wires, embrace convenience, and elevate your projects to new heights. Upgrade your connectivity game today!