sparkfun RN-52 User Manual Download Page 1

RN-52 Bluetooth Hookup Guide 

 

CONTR IBUTORS: 

JOELEB

Overview

The RN-52 is a sleek Bluetooth audio module from Roving Networks. It 
allows you to send stereo audio over a wireless Bluetooth connection. The 
module has an embedded DSP that handles the audio stream entering and 
exiting the module, converting the digital wireless signals into audio and 
vice versa. The module is easy to configure with both ASCII commands and 
GPIO. It can function as a stand alone module, or it can be incorporated 
with a microprocessor to create the ultimate wireless audio experience.

Covered in this Tutorial

In this tutorial, we will go over some of the module’s features. We’ll show 
you how to configure the module to suit your projects needs, how to hook it 
up, and go over a simple example project using the RN-52.

Suggested Reading

• Bluetooth Basics

Page 1 of 14

Summary of Contents for RN-52

Page 1: ...ss signals into audio and vice versa The module is easy to configure with both ASCII commands and GPIO It can function as a stand alone module or it can be incorporated with a microprocessor to create...

Page 2: ...ou to configure the device over a UART serial connection This can also be used to send commands to the module from a microcontroller HFP HSP Support of both Hands Free Profile and Headset Profile mean...

Page 3: ...converts the radio waves sent from the transmitter device phone computer etc into electrical signals that can then be sent to the amplifier and then to your audio output speakers headphones When stre...

Page 4: ...oltage should be in the 3 0 3 6V range 2 GPIO Pins The RN 52 has eleven general purpose input output pins GPIO Many of these pins are reserved for special functions when the module is booted up and wh...

Page 5: ...lso be used to connect the module to an external microcontroller that issues commands and handles status updates 4 USB The USB lines are strictly used for device firmware update DFU mode Used in conju...

Page 6: ...e SPI lines 8 PCM Another option for communicating with the module is the Pulse Code Modulation PCM pins PCM is a way to digitally represent sampled analog signals This is done over an I S connection...

Page 7: ...kout Another option and the one that will be used in all the demos in this tutorial is to solder straight male headers to the breakout so that it can be used in a breadboard Note The RN 52 breakout is...

Page 8: ...red even if power is already supplied This is useful in headset hands free applications where a battery is attached to the module but the module doesn t need to be on all the time Hold down the moment...

Page 9: ...begin flashing alternately 4 Your device is now ready to make a connection Rather than connect over Bluetooth the connection will be made over the serial UART 5 Open a terminal window on the port you...

Page 10: ...lt name is RN52 xxxx where the last four numbers are the same last for numbers of the RN 52 s address If you only have one RN 52 you can change the name to whatever you d like If you have multiple RN...

Page 11: ...e RN 52 all terminate with a carriage return r not with a carriage return line feed If you keep seeing after every command you enter there should be a setting in your serial terminal to turn on just c...

Page 12: ...th the AVRCP buttons disabled Future versions of the firmware may differ Looking in the Command Specifications document we find this table EK is the Evaluation Kit Roving Networks sells and comes with...

Page 13: ...volume needs to be cranked up to achieve normal indoor volume If you re not satisfied with the volume an external amp can be connected to the speaker pins We recommend using the Audio Amplifier Kit Re...

Page 14: ...ll the hardware files and info This site is a handy Bluetooth Class of Device CoD generator For more tutorial action check out these related tutorials BC127 Audio Bluetooth Hookup Guide Interactive Ha...

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