API Audio Accessories 7-22-10 User's Guide download pdf (Page 5)

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4. System Overview

4.1. System Architecture

Figure 1 : HxM System Architecture

The diagram above shows that the Bluetooth HxM typically communicates with a mobile device over the Bluetooth

link. The HxM only supports one link at a time and uses the Bluetooth SPP (Serial Port Profile) to communicate

with other devices with the following low-level protocol:

• 115,200 baud

• 8 data bits

• 1 stop bit

• No parity

4.2. Connecting to HxM Device

The device is discoverable. The discoverable name of the device is HXMXXXXXX where XXXXXX is the

programmed serial number of the HxM device.

When the HxM device is in a connected state it is not discoverable.

The following steps have to be undertaken to connect to a HxM device.

1) Activate the Bluetooth service of the device/computer wanting to connect to the HxM

2) Scan for Bluetooth devices in range

3) Pair with the HxM device found in range

4) Discover Services of Paired HxM

5) Connect to serial port of HxM device

The following screenshots show the above process with the standard Microsoft Bluetooth driver and Microsoft

Windows XP Operating System.

Mobile Device

HxM

Bluetooth Link

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API Audio Accessories 7-22-10 User's Guide Page 5