Wireless Audio Bluetooth Adapter w/ BC127

Contributors: bboyho
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It all started when my friend and I were running late for a local dance competition. As soon as we arrived, my friend quickly exited the car and grabbed his phone. Without realizing it, he had ripped the audio connector off the cable while it was still connected to his phone. It was at that point that I decided to upgrade my sound system by adding an audio Bluetooth.

Wireless Audio Bluetooth Adapter for Car

Required Materials

To configure a BC127, make sure to have these parts:

SparkFun FTDI Basic Breakout - 5V

SparkFun FTDI Basic Breakout - 5V

Break Away Male Headers - Right Angle

Break Away Male Headers - Right Angle

SparkFun USB Mini-B Cable - 6 Foot

SparkFun USB Mini-B Cable - 6 Foot


To build the wireless audio Bluetooth adapter, you will need the following parts. You may not need everything though, depending on what you have and what you want to do. Add it to your cart, read through the guide, and adjust the cart as necessary depending on what you would like.

You will also need:

  • Speakers w/ 3.5mm Audio Jack
  • 3.5mm Audio Cable
  • 5V Car Adapter
  • Cardboard Box


You will also need:

Suggested Reading

If you aren’t familiar with the following concepts, we recommend checking out these tutorials before continuing.

How to Solder: Through-Hole Soldering

This tutorial covers everything you need to know about through-hole soldering.

Installing an Arduino Library

How do I install a custom Arduino library? It's easy! This tutorial will go over how to install an Arduino library using the Arduino Library Manager. For libraries not linked with the Arduino IDE, we will also go over manually installing an Arduino library.

Working with Wire

How to strip, crimp, and work with wire.

Bluetooth Basics

An overview of the Bluetooth wireless technology.

Understanding the BC127 Bluetooth Module

SparkFun has two boards using the BC127; here's what you need to know to use them.