Jeff Rowberg
Designer of the Keyglove and other open electronic devices, based in Roanoke, VA.
Joined: March 19, 2011
Country: United States
WT32i Bluetooth Audio Breakout Board
WT32i Bluetooth Audio Breakout Board
WT32i Bluetooth Audio Breakout Board
WT32i Bluetooth Audio Breakout Board


IMMINENT CHANGE: I have recently created a new storefront to accommodate the needs of a more customized approach to selling multiple variants. All of my breakout boards will no longer be available through InMojo. For all future purchases, please visit:


  • InMojo has been excellent in every regard, and this is not to reflect badly on either their platform (which is great) or staff (who have been very helpful). But there are features I need which make sense for breakouts while not being so useful for other types of products. It is more logical for me to create a custom store than ask them to rewrite their entire website. Thanks for a great venue!


    This breakout board gives you full access to all of the pins of Bluegiga's versatile WT32i Bluetooth audio module. Notable features include:

  • Latest iWRAP6 firmware released from Bluegiga
  • Standard 0.1" pin spacing
  • Two aligned pin rows for easy breadboard mounting
  • Narrow enough to allow for pin access on both sides of a typical double-column 5-pin breadboard
  • Power header
  • UART interface header
  • Module reset button
  • Flow control RTS/CTS solder jumper (like the BlueSMiRF)
  • Power LED, and USR LED connected to PIO5 which may be controlled through iWRAP

  • NOTE: Building this by hand is not an easy task. If you are not very comfortable with SMT modules and hot-air rework, I strongly recommend buying the assembled module instead of the board itself.

    The UART header allows control of the module using its UART interface, and the header is pin-compatible with SparkFun's BlueSMiRF modules. The WT32i's default port settings are 115200, 8/N/1, hardware flow control enabled but optional. Note that if you are not using flow control, you should connect CTS to GND to ensure reliable operation.

    If you are using the Arduino Serial Monitor tool, remember that each command sent must end in a CR+LF. Make sure your terminal settings are correct in this regard.

    The WT32i, which uses the latest iWRAP6 firmware, can do everything you could want to do with a Bluetooth module including high-quality A2DP streaming audio, and AVRCP media control. Details on the module are available here:

    The technical resource area of Bluegiga's site where you can find all kinds of documentation and application notes for the WT32i and iWRAP protocol is here (free registration required):

    You can buy the WT32i module itself for about $23 from SemiconductorStore or Mouser:



  • I am also working on a feature-complete iWRAP parser library. It provides an event-driven platform for easily working with iWRAP's AT command set. Examples are available in generic C (assuming a PC/Mac/Linux host) as well as for the Arduino platform. The latest code is available in this GitHub repository:

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    Community Feedback
    WT32i Breakout Board with mounted WT32i module and required components. Just add header pins of your choice!
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    18 users want this
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    PCB only
    WT32i Breakout Board (PCB only, no Bluetooth module or components). SMD work required to mount the module and other components.
    - no items in stock -
    4 users want this
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