Bluegiga WT32i Bluetooth® Audio Module

Simple and High Quality Bluetooth Audio

WT32i is an audio specific Bluetooth 3.0 module with excellent radio frequency performance and enhanced audio features, enabling a best in class Bluetooth audio experience. In addition to a certified Bluetooth radio and software stack, WT32i also contains a DSP, stereo audio codec, and battery charger making it ideal for fixed and portable audio applications. WT32i includes Bluegiga iWRAP6 Bluetooth stack software which implements A2DP, AVRCP v.1.5 profiles and supports aptX® and AAC audio codecs for stereo audio applications. For hands-free applications iWRAP6 software also supports HFP v.1.6, HSP, MAP and PBAP and CVC® echo cancellation software. For data communications to Android and iOS applications iWRAP6 also implements Bluetooth Serial Port Profile (SPP) and Apple iAP profiles. WT32i is an ideal solution for developers who want to quickly integrate the latest Bluetooth audio technologies without the time and costs typically involved with a Bluetooth audio chipset design.

Module Benefits

Excellent Radio Performance:

  • Up to 200 meter range (between two WT32i's)
  • A2DP streaming up to 50 meters with typical smartphone

Bluetooth and Regulatory Qualifications

  • Proven interoperability
  • Minimal qualification costs

Wide Bluetooth Profile Support:

  • Enables wide range of uses cases
  • Differentiation from simple Bluetooth speakers

Field Upgradable Firmware

Superior Audio Features:

  • Integrated Bluetooth audio profiles
  • On-board DSP and 16-bit stereo code
  • captX®, AAC, WBS
  • Optional CVC® echo cancellation

Module Specifications

Radio Features:

  • Bluetooth 3.0
  • Bluetooth class 1 radio
  • Transmit power: +6.5 dBm
  • Receiver sensitivity: -90 dBm
  • Integrated chip antenna or U.FL connector

Audio Features:

  • Integrated DSP
  • 16-bit stereo codec
  • 44.1 kHz ADC, 48 kHz DAC
  • Analog, I2S, PCM, SPDIF and microphone interfaces
  • Optional aptX® and AAC stereo audio codecs
  • Optional CVC® echo cancellation
  • Wide Band Speech

Hardware Features:

  • UART host interfaces
  • 802.11 co-existence interface
  • 10 software programmable IO pins
  • Li-Ion and Li-Poly battery charger
  • Operating voltage: 1.8 V to 3.6 V
  • Temperature range: -40 °C to +85 °C


  • Dimensions: 35.75 mm x 14.50 mm x 2.6 mm
  • Bluetooth
  • CE
  • FCC and IC
  • Japan
  • South Korea

  • Bluegiga iWRAP Bluetooth stack
  • A2DP, AVRCP 1.5, HFP 1.6, and HSP
  • SPP and Apple iAP1 and iAP2
  • ASCII commands over UART


Getting Started with WT32i Bluetooth Audio Module

WT32i Bluetooth Audio Wireless Starter Kit

The easiest way to begin development with the WT32i Bluetooth Module is with the WT32i Bluetooth Audio Wireless Starter Kit.

Add to Cart


Title Version Resource Type
iWRAP 5.0.2 Software Release Notes 5.0.2 Release Notes
iWRAP5.x and iWRAP6.x Release Notes Release Notes
iWRAP6 Presentation Presentations
BGTerm Terminal Software (Supports iWRAP MUX Protocol) Software
USB Development Driver for Windows Software
BlueSuite 2.5 (Blueflash, PSTool, BlueTest etc.) 2.5 Software
iWRAP5.x and iWRAP6.x Software Releases 5.7 / 6.2 Software
Bluetooth, Wi-Fi and Regulatory Certifications Miscellaneous
Compare iWRAP Software Versions 012919 Miscellaneous
iAP Reference Application v1.1 Miscellaneous
PCM Configuration Tool Miscellaneous
SPI Programming Cable Schematics Schematic and Layout Files
WT32i Bluetooth Audio Module Presentation Presentations
Developing Bluetooth Audio Solutions Presentations
WT32i Reference Design Reference Designs
WT32i Development Kit Design Documents Reference Designs
WT32i PADS Decals Reference Designs
WT32i Canada Certificate and Test report Miscellaneous
WT32i Japan Certificate and Test Report Miscellaneous
WT32i Bluetooth Reports and PICS Miscellaneous
WT32i CE Test Reports and DoC Miscellaneous
WT32i FCC Reports and Grant Miscellaneous
WT32i Korea Certificate and Test Report Miscellaneous
Bluetooth Classic Ultralibrarian CAD Footprints and Symbols 1.00 Schematic and Layout Files
AN1160: Project Collaboration with Simplicity Studio 0.2 Application Notes
AN0822: Simplicity Studio™ User's Guide 0.5 Application Notes
AN1121: Headless Builds with Simplicity Studio v4 0.1 Application Notes
Wireless Selector Guide 7 Brochures
180822330 Module Label Change - RoHS Label Only Product Change Notifications (PCN)
17052273 Relocation of Singapore Test Centre and Order Fulfillment Centre, Modules Product Change Notifications (PCN)
180409274-Anatel-Certification-ID Product Change Notifications (PCN)
iWRAP6 API Reference Manual for WT 3.8 Reference Manuals
170725117 CDTech Additional Assembly Test Ship site for WT321 Product Change Notifications (PCN)
Wireless IoT Modules Master Errata for Shield Marking 1.0 Errata
AN992: Hands-Free and Headset Profiles 1.13 Application Notes
AN994: Bluetooth® PBAP and MAP Profiles 2.6 Application Notes
AN993: Bluetooth® HID Profile 1.15 Application Notes
AN1000: WT32i Range Tests 1.1.1 Application Notes
AN999: WT32i Current Consumption 1.1 Application Notes
UG218: iWRAP 5.6.0, iWRAP 6.1.0, and iWRAP 6.1.1 User Guide and API Reference 3.7 User Guides
UG225: WTxx/BTxx USB Design Guide 2.0 User Guides
UG216: Firmware Updates User Guide 2.0 User Guides
UG217: iWRAP5 User Guide 1.29 User Guides
UG215: WT32i Development Kit User Guide 1.11 User Guides
iWRAP5 API Reference Manual for WT 1.29 Reference Manuals
Product Data Sheet 1.3.1 Data Sheets
AN990: Bluetooth® Serial Port Profile iWRAP 1.3 Application Notes
AN989: Obex OPP and Obex FTP Profiles iWRAP 1.4 Application Notes
AN987: Bluegiga I/O Profile iWRAP 1.5 Application Notes
AN988: Health Device Profile 3.5 Application Notes
AN986: Bluetooth® A2DP and AVRCP Profiles 2.2 Application Notes
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