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Product Overview

The WT41 is a fully integrated Bluetooth 2.1 + EDR, class 1 module combining antenna, Bluetooth radio, and an on-board iWRAP Bluetooth stack. The WT41 provides a superior 110dB link budget and more than 1000-meter line-of-sight connectivity for Bluetooth applications where extreme radio performance or reliability is required. It also constitutes an ideal solution for developers that want to quickly integrate extremely high performing Bluetooth wireless technology into their design without investing several months in Bluetooth radio and stack development.

The WT41 uses Bluegiga's iWRAP Bluetooth stack, which is an embedded Bluetooth stack implementing 13 different Bluetooth profiles and Apple iAP connectivity. By using WT41 combined with iWRAP Bluetooth stack and Bluegiga's excellent technical support, designers ensure quick time-to-market, and low development costs and risks.


Key Benefits

  • Superior radio performance
    • 110dB link budget provides 1000+ meter line-of-sight connectivity
  • Fully integrated Bluetooth solution 
    • Low development costs
    • Fast time-to-market
  • On the field upgradeable
  • Bluetooth, CE, FCC, IC, Japan, and South Korea qualified 
    • Proven interoperability 
    • No qualification costs
  • Co-existence with Bluegiga's Wi-Fi products


Radio  features:

  • Bluetooth v.2.1 + EDR
  • Bluetooth class 1 radio
  • Transmit power: +20 dBm
  • Receiver sensitivity: -90 dBm
  • Range: 1000+ meter line-of-sight
  • Integrated chip antenna or U.FL connector

Hardware features:

  • UART and USB host interfaces
  • 802.11 co-existence interface
  • 6 software programmable IO pins
  • Operating voltage: 2.7V to 3.6V
  • Temperature range: -40°C to +85°C
  • Dimensions: 35.55 x 14.50 x 5.65mm


  • Bluetooth
  • CE
  • FCC
  • IC
  • Japan
  • South Korea (WT41-E only)


  • Bluegiga iWRAP Bluetooth stack
    • 13 Bluetooth profiles
    • Apple iAP support
  • HCI over UART or USB

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.


iWRAP6 Presentation 446.88 KB

Training Material

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

WT41-A/N Data Sheet 1.37 MB
WT41-E Data Sheet 1.14 MB
WT41 Development Kit Data Sheet 408.86 KB

User Guides

iWRAP6 User Guide and API Reference 2.67 MB
iWRAP5 User Guide and API Reference 2.17 MB
Firmware Update Guide 667.25 KB

Application Notes

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: HDP Profile Configuration and Usage 1.07 MB
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 484.42 KB
iWRAP 5.0.2 Software Release Notes 242.77 KB
iWRAP5.5 and iWRAP6 Release Notes 260.50 KB
iWRAP4, iWRAP5, iWRAP5.5 and iWRAP6 Software Releases 47.65 MB

Example Applications

iAP Reference Application 193.78 KB

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
USB Development Driver for Windows 699.40 KB

Reference Designs

WT41 Development Kit Schematics 39.41 KB
WT41 Development Kit Design Material 432.55 KB
WT41 PADS Decal 2.06 KB
USB Design Guide 627.50 KB
SPI Programming Cable Schematics 13.97 KB


WT41-A Bluetooth Qualified Design Listing Details
WT41-A CE Reports and DoC 2.10 MB
WT41-A FCC Reports and Grant 7.12 MB
WT41-A Industry Canada Certificate 62.40 KB
WT41-A Japan Reports and Certificate 5.03 MB
WT41-A ATEX Data 318.64 KB
WT41-E Bluetooth Qualified Design Listing Details
WT41-E CE Reports and DoC 4.20 MB
WT41-E FCC Reports and Grant 2.71 MB
REACH Statement 30.82 KB
WT41-E Industry Canada Certificate 91.03 KB
WT41-E Japan Reports and Certificate 1.17 MB
WT41-E KCC Report and Certificate 3.73 MB
WT41-E Taiwan Reports and Grant 2.21 MB
RoHS II Compliance Statement 33.35 KB

The WT41 Evaluation Kit is designed to assess the WT41 Bluetooth module or prototyping and all piloting long-range Bluetooth applications.

WT41 Development Kit Contents:

  • The WT41 development board contains:
    • WT41 Long Range Bluetooth Module
    • RS232 and USB interfaces
    • PCM codec and 3.5mm audio jacks
    • IO header
    • USB or 5-9V power supply
    • Debug connector
    • Software programmable buttons
  • RS232 cable
  • Micro USB cable
  • Debug cable for firmware updates
  • Documentation
  • Pre-installed with the latest iWRAP Bluetooth software

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