WT32i Bluegiga Legacy 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


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