BT44X Datasheet, PDF (1/6 Pages) Laird Tech Smart Technology – This document describes the process for configuring two BTM44X modules to establish a connection using

BTM44x Series HID Host
Application Note
v1.1
INTRODUCTION
This document describes the process for configuring two BTM44X modules to establish a connection using
the HID (Human Interface Device) protocol. One module acts as an HID host and the other acts as an HID
device.
There are four variants of the BTM44x module which interface with a host via UART and one of two logical
protocols. The BTM440 and BTM441 modules are configured by factory default to use the multipoint (MP)
protocol. To send MP protocol data to the module, the MPBtHost utility (available from Laird) can be used. If
using a BTM442 or BTM443, the module defaults into AT protocol mode. If using these variants, refer to the
BTM44x User Guide to switch to the MP protocol before continuing.
This application note is written based on the assumption that you have access to two BTM44x development
kits, a Windows PC (XP or higher), and the MpBtHost utility software available from Laird. To configure the
modules via a non-Windows device (such as a microcontroller), refer to the “Multipoint Protocol” section of
the BTM44x User Guide for packet descriptions for each command used in this document.
CONNECTING TO THE MODULES
To connect the modules, follow these steps:
Connect each development board to an available USB port on your Windows PC.
Once the drivers are installed, two new COM ports should be available on your PC.
When the two modules are successfully connected, load two instances of the MPBtHost utility. Read
and accept the license.
Select the appropriate COM ports for the connected modules, ensure the default values of
115200,N,8,1 are selected, and click OK to proceed.
MpBTHost then resets the modules and display the comms log window (Figure 1).
Figure 1: Reset module wizard
Either wait for approximately ten seconds or click Go to bypass the wait.
On reset, the utility identifies the module and its Bluetooth address and displays the information in the
bottom right of the software if the module is powered up and connected (Figure 2).
Embedded Wireless Solutions Support Center:
1
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
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Europe: [phone]
Hong Kong: [phone]