Logic IO RT-O-BT1-MX2, RT-O-BT1-DX4, RT-O-BT1-AX Technical Manual

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Technical Manual for the

Bluetooth Smart-antenna

Version 1.07

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Introduction

This manual contains technical documentation allowing easy installation and use of the
Bluetooth Smart Antenna (BSA). For information on the software programming please
refer to the RTCU IDE on-line help.

The BSA is an intelligent Bluetooth antenna, which adds Class 2 Bluetooth network
support to certain RTCU X32 units. The BSA supports up to four simultaneously
connections that allow connections to headset, printer, pc etc. without needing to close an
existing connection. The BSA is easy to use through the dedicated functions in the RTCU
IDE development software. The functions add support for network discovery/scan, inbound
and outbound connections, and connection information such as signal level, address, type,
name etc.

Two versions of the BSA are available for order and both supports Bluetooth Serial Port
Profile (SPP)

Headset connection is available on the RT-O-BT1-MX2 so Hands-Free Profile Audio
Gateway (HFP-AG) is easily used and installed on RTCU X32 units with headset
connector.

Supported RTCU X32 units

Ordering information and supported RTCU X32 units.

RT-O-BT1-MX2 RT-O-BT1-DX4 RT-O-BT1-AX9

MX2i pro DX4 pro AX9 pro
MX2i pro+ MX2i pro (no audio)
MX2i pro+ (no audio)

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 2 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Table of Contents

Introduction ......................................................................................................................... 2

Supported RTCU X32 units................................................................................................. 2

Table of Contents................................................................................................................ 3

Graphical view..................................................................................................................... 4

External connections........................................................................................................... 4

Power supply ................................................................................................................... 4

Communication................................................................................................................ 4

Headset connector (RT-O-BT1-MX2 only) ...................................................................... 4

Installation........................................................................................................................... 4

MX2i Pro/Pro+ ................................................................................................................. 4

DX4 Pro........................................................................................................................... 4

AX9 Pro ........................................................................................................................... 4

Indicators (LED’s)................................................................................................................ 4

Specifications for the Bluetooth Smart Antenna .................................................................. 4

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 3 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Graphical view

RT-O-BT1-MX2

RT-O-BT1-DX4
RT-O-BT1-AX9

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 4 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

connector

Serial port 1

Serial port 1

External connections

Connections to the RTCU X32 unit are very easy as only one connections is necessary,
and the BSA is ready to be connected directly to the RTCU X32 unit at delivery.

The BSA is connected to the Serial Port 1 (service port on MX2i and DX4, Serial Port 1 on
AX9) on the RTCU X32 unit.

Serial connection

Communication and

power connector.

Connect to RTCU X32

Audio connection

Active LED (blue)

Status LED (BiColor)

2.5mm jack audio

connector. Connect to

RTCU X32 headset

RT-O-BT1-MX2

Serial connection

Active LED (blue)

Status LED (BiColor)

Communication and

power connector.

Connect to RTCU X32

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

RT-O-BT1-DX4

Page 5 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Active LED (b

lue)

Serial connection

Communication and

power cables.

Status LED (BiColor)

RT-O-BT1-AX9

Power supply

The BSA is supplied directly from the RTCU X32 unit via the DC-OUT pin in the service
port connector / screw terminals. When the BSA is connected no other devices may be
connected to the DC-OUT due its output current handling capabilities.

The BSA must be supplied with 3.3VDC.

Communication

Communication between the RTCU X32 unit and the BSA is via RS232. When the BSA
receives data from a connected Bluetooth device, the data will be passed trough to the
RTCU X32 unit, which will buffer the data until the application retrieves it. However, as the
buffers in the RTCU X32 are limited, the application must retrieve the data as fast as
possible; otherwise data will be lost – especially when large amount of data flows.

If a connection to a BSA device is poor, for example due long distance between the BSA
and the device, the data transmission speed to the device will be lowered, as the data is
re-transmitted. When this occurs the BSA will start to buffer the data until its internal
buffers are filled. As this may happen during a call to a Bluetooth function from the
application, the function will wait until the BSA buffers are ready again.
Please refer to the RTCU IDE online help for further information.

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 6 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Headset connector (RT-O-BT1-MX2 only)

The supplied cable comes with a 4-pole 2.5mm jack connector with standard Nokia pin­out. The connector can be inserted directly into supported X32 units with headset
connector.

The BSA supports a single audio connection to for example a Bluetooth headset. The
audio connection uses two of the four possible connections; one for control and one for
audio.

The audio input and output are differential signals, and must be handled as such to
suppress noise from GSM among others.

4 pin headset connector overview.

Pin Name Description

1 Out + Audio output positive (microphone level)
2 In + Audio input positive (speaker level)
3 Out - Audio out negative (microphone level)
4 In - Audio input negative (speaker level)

Installation

BSA modules are designed to make the installation easiest possible for the user. Following
describes briefly how to connect the BSA to different supported RTCU units.

MX2i Pro/Pro+

There are two connection cables to the MX2i from the BSA; one 2,5 mm jack headset
connector (RT-O-BT1-MX2 only), and one 6-poled tyco connector for supply and
communication.

1. If an application program for using the BSA not already uploaded to the MX2i unit,
be sure to choose the Serial Port 2 as alternative service port, as BSA will occupy
the default service port.

2. Connect the jack headset male connector to the female jack connector on the MX2i

3. Connect the 6-poled tyco connector to the service port.

Page 7 of 11

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

DX4 Pro

There is only one connection cable to the DX4 Pro from the BSA; 6-poled tyco connector
for supply and communication.

1. If an application program for using the BSA not already uploaded to the MX2i unit,
be sure to choose the Serial Port 2 as alternative service port, as BSA will occupy
the default service port.

2. Connect the 6-poled tyco connector to the service port.

AX9 Pro

There is only one connection cable to the AX9 Pro from the BSA, but as there isn’t any
easy-to-plug connector at the end of the cable, each connection to the AX9 Pro needs to
be made manually. Cables are color coded, and these colors will be used in the following
description:

As seen on the above picture, there are 5 signals to be connected to the AX9 Pro. The
cable colors and the signal names on the AX9 Pro are given in the following table:

Color Signal Name

Black SGND
Yellow SER1_RXD
Blue SER1_TXD
Red DCOUT33
Green DEV_DET

Connect the 5 colored cables to their respective labeled angled screw terminals as
mentioned in the above table. Please refer to AX9 Pro Technical Manual to locate the
terminals. As the cable length doesn’t allow the module to be mounted outside of the
enclosure, the recommended mounting location inside the enclosure is as following:

Page 8 of 11

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 9 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Indicators (LED’s)

The blue LED will indicate the BSA is active. It is connected to the TXD pin on the module.
When no communication exists the LED is on and when heavy communication exists the
LED will blink in short intervals.

The bicolor status-LED is can be controlled by the VPL application to indicate different
states of the BSA. Please refer to the RTCU IDE online help for further information.

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 10 of 11

Technical Manual 1.0

7

, Bluetooth Smart

-ante

nna

Specifications for the Bluetooth Smart Antenna

Logic IO ApS. Ph: ([phone]
Holmboes Allé 14 Fax: [phone]
8700 Horsens Email: [e-mail]
Denmark www.logicio.com / www.rtcu.dk

Page 11 of 11