iWRAP Bluetooth® Classic Software Stack

The iWRAP is an embedded Bluetooth stack for Bluegiga's Bluetooth classic modules. It exposes a powerful yet easy-to-use command interface to manage Bluetooth operations. It hides the complexity of the Bluetooth protocol stack and profiles from the end-user and can be used for almost anything; from simple data or audio applications to more complex use cases where interaction with several Bluetooth-enabled devices are needed - or even multi-profile environments for simultaneous audio and data connections.

The 6th generation iWRAP™ Bluetooth stack targets Bluegiga’s Bluetooth classic modules. It features both Apple iAP1 and iAP2 profiles supporting all Apple iOS devices on the market. iWRAP6 also adds the latest versions of Bluetooth audio profiles such as AVRCP v.1.5 with media browsing capabilities, MAP profile for SMS notifications and message download and new aptX® and AAC audio codecs for improved audio experience.

Key Benefits

  • A simple ASCII-based command and response API
    • Easy to use and learn
    • Fast application development
    • Low resource requirements for the host
  • A wide range of Bluetooth profiles
    • Enable complex use cases possible
  • Customizable by Bluegiga Technologies
    • New features and profiles can be added
    • Offers product differentiation at low risk
    • No Bluetooth development skills or tools needed
  • On the field upgradeable
  • Bluetooth qualified
  • Proven interoperability


Latest Firmware for WT32i Audio Module Version 6.1

  • Release note
  • Download firmware
  • Audio tone support – audio tones (files) can be stored on the Bluetooth module’s flash memory, with playback support for stored files
  • Audio tone mixing – audio tones can be mixed with A2DP or HFP audio output
  • Simultaneous AVRCP controller and target profiles – improved user experience with the latest smart phones
  • Enhanced user-configurable Bluetooth reconnection logic Software application programming interfaces (APIs) added for the I²C interface


A Bluetooth Stack With:

  • 13 integrated Bluetooth profiles
  • Apple iAP1 and iAP2 over Bluetooth (MFI)
  • Two Bluegiga proprietary profiles

Bluetooth 3.0 Compliance:

  • Bluetooth qualified
  • Secure simple pairing support
  • Seven simultaneous connections
  • 600 kbps data rate

Supported Bluetooth Profiles:

  • Serial Port Profile
  • Apple iAP1 and iAP2
  • Human Interface Device
  • Advanced Audio Distribution Profile
  • A/V Remote Control Profile v.1.5
  • Hands-Free Profile v.1.6
  • Headset Profile v.1.2
  • Phone Book Access Profile
  • Message Access Profile
  • Device Identification Profile
  • Bluetooth Health Device Profile
  • Dial-up Networking Profile
  • Object Push Profile
  • File Transfer Profile

Audio Features:

  • SBC, aptX® and AAC codecs
  • Wide Band Speech
  • CVC echo cancellation
  • External codec configuration over I2C

Proprietary Profiles:

  • Bluegiga IO Profile
  • Bluegiga OTA Profile


iWRAP6 Presentation
Example Applications
iAP Reference Application
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