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Product Overview

The WT32 is a Bluetooth 2.1 + EDR module dedicated for Bluetooth audio applications. In addition to Bluetooth radio, antenna and iWRAP Bluetooth stack, the WT32 contains a DSP processor, a stereo audio codec and a battery charger making it ideal for portable battery Bluetooth stereo or hands-free audio applications. The WT32 constitutes an ideal solution for developers that want to quickly integrate the latest Bluetooth audio technologies into their design without investing several months into Bluetooth radio and stack development. In addition to the standard Bluetooth audio profiles, the WT32 can also support aptX® audio coding technology, offering outstanding Bluetooth Stereo audio quality, CVC audio enhancement software for hands-free applications and Apple iAP profile enabling OEMs, to create really unique and differentiated audio products.

For new designs we recommend the pin compatible WT32i Bluetooth Audio Module.

Key Benefits

  • Fully integrated Bluetooth solution 
    • Low development costs
    • Fast time- to-market
  • Bluetooth qualified 
    • Proven interoperability 
    • No qualification costs
  • Co-existence with Bluegiga's Wi-Fi products
  • Audio profiles and features
    • Integrated A2DP, AVRCP, HFP v.1.6, HSP and PBAP
    • On-board DSP and stereo codec
    • aptX and CVC software
  • Other Bluetooth profiles
    • Bluetooth SPP and Apple iAP profiles
  • On the field upgradeable


Radio  features:

  • Bluetooth v.2.1 + EDR
  • Bluetooth class 2 radio
  • Transmit power: +7 dBm
  • Receiver sensitivity: -86 dBm
  • Integrated chip antenna or W.FL connector

Hardware features:

  • UART host interfaces
  • 802.11 co-existence interface
  • 10 software programmable IO pins
  • Li-Ion and Li-Poly battery charger
  • Operating voltage: 1.8V to 3.6V
  • Temperature range: -30° C to +85°C
  • Dimensions: 35.75 x 14.50 x 2.6mm

Audio features:

  • Analog, I2S, PCM and SPDIF interfaces
  • Microphone input
  • Integrated DSP
  • Integrated stereo audio codec


  • Bluetooth
  • CE
  • FCC
  • IC
  • Japan


  • Bluegiga's iWRAP Bluetooth stack
    • 13 Bluetooth profiles
    • Apple iAP support
  • aptX audio codec
  • CVC echo cancellation

Documentation and Software

Download data sheets, SDKs / software releases, app notes, example applications, reference designs training material, user guides, reference designs, videos and more. Download our side-by-side product comparison guide.

Training Material

Developing Bluetooth Audio Solutions 1.32 MB
Bluetooth Solutions for Apple iOS devices 781.06 KB
Bluetooth, Wi-Fi and Regulatory Certifications 1012.29 KB
Bluetooth End Product Listing (EPL) Guide 595.79 KB

Data Sheets

WT32 Bluetooth Audio Module Data Sheet 1.47 MB
WT32 Development Kit Data Sheet 1.09 MB
WT32 Antenna Data Sheet 5.26 MB

User Guides

iWRAP5 User Guide and API Reference 2.17 MB
Firmware Update Guide 667.25 KB

Application Notes

Application Note: iWRAP4 and iWRAP5 A2DP Profile Configuration and Usage 594.17 KB
Application Note: SPP Profile Configuration and Usage 474.92 KB
Application Note: HFP and HSP Profile Configuration and Usage 643.86 KB
Application Note: HID Profile Configuration and Usage 542.88 KB
Application Note: iWRAP4 and iWRAP5 PBAP Profile Configuration and Usage 442.42 KB
Application Note: BGIO Profile Configuration and Usage 438.40 KB
Application Note: OBEX Profile Configuration and Usage 481.00 KB

Software Releases

Compare iWRAP Software Versions 416.55 KB
iWRAP 5.0.2 Software Release Notes 238.37 KB
iWRAP5.x and iWRAP6.x Software Releases 35.17 MB

Example Applications

iAP Reference Application 193.78 KB

Reference Designs

WT32 Development Kit Design Material 1.06 MB
WT32 PADS Decal 1.30 KB
SPI Programming Cable Schematics 13.97 KB


WT32 Bluetooth Qualified Design Listing Details
WT32 CE Reports and DoC 3.18 MB
WT32 FCC Reports and Grant 3.54 MB
WT32-A Industry Canada Certificate 649.80 KB
WT32-E Industry Canada Certificate 650.32 KB
WT32 Japan Report and Certificate 3.52 MB
WT32 ATEX Data 134.79 KB
Safety Investigation Report 148.23 KB
REACH Statement 30.82 KB
RoHS II Compliance Statement 33.35 KB


NFC Demonstration Using WT32 Audio Module Evaluation Board

PC Tools

BGTerm Terminal Software (Supports iWRAP MUX Protocol) 7.20 MB
BlueSuite 2.5 (Blueflash, PSTool, BlueTest etc.) 6.79 MB
PCM Configuration Tool 103.5 KB

The WT32 Evaluation Kit is designed to assess the WT32 Bluetooth module or prototyping and all piloting Bluetooth stereo or mono audio applications.

WT32 Development Kit Contents:

  • WT32 development board contains:
    • WT32 Bluetooth Module
    • RS232 and USB charger interfaces
    • 3.5mm analogue stereo input and output
    • 3.5mm microphone input
    • IO header
    • Five software programmable buttons
    • Two leds
    • Rechargable Li-Ion battery
    • Debug connector
  • RS232 cable
  • Micro USB cable
  • Debug cable for firmware updates
  • Stereo headphones
  • Documentation
  • Pre-installed with latest iWRAP Bluetooth software

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