User's Manual

Chapter 10 – SocketWireless Bluetooth (MTS2BTSMI)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342D) 126
Chapter 10 – SocketWireless
Bluetooth (MTS2BTSMI)
Introduction
The Multi-Tech Systems, Inc. SocketWireless with Bluetooth-enabled technology allows developers to establish
wireless networks using a special set of AT commands and a developer board. The SocketWireless with Bluetooth
technology makes the cable-replacement transition to wireless networks seamless and easy.
This chapter explains how to establish Bluetooth communication between two serial devices for data applications in a
point-to-point network. Bluetooth-enabled devices create communication-ready devices by integrating data
functionality into a single, universal socket design. This complete, ready-to-integrate device dramatically reduces
development time and costs for system designers.
Origin of the Term “Bluetooth”
An initial effort to standardize wireless transmission between a variety of devices such as
PCs, cordless telephones, headsets, printers, and PDAs was in the form of a consortium
(April, 1998) of Intel, Microsoft, IBM, Toshiba, Nokia, Ericcson, and Puma technology. The
project was code-named Bluetooth after Harald Blaatand (Bluetooth), the 10
th
century Danish
king who unified Denmark and Norway. — from Newton’s Telecom Dictionary, 20
th
Edition
Notes about Byte Gaps and Data Latency
Because of the way Bluetooth is designed and operates, random byte gaps of 5 ms to 20 ms are common.
Packet size will vary from transmission to transmission.
Although the serial bandwidth operates up to 920K, effective data throughput in fast streaming mode is
approximately 200Kbp. Effective data throughput in regular data mode is 60Kbps. The reason for the slower
speed in regular mode is due to the AT parser, which looks at each character for ASCII valid command scripts in
the regular mode's data stream.
The SocketWireless RX has very limited buffering, so if you do not use hardware flow control and are
transmitting further distances, you will quickly overflow the 50 byte buffer because of RF retransmissions, etc.
When a Bluetooth connection is made, the SocketWireless device goes into regular data mode per the power-up
factory default settings. This enables the user to remotely configure the SocketWireless settings via a remote RF
Bluetooth connection. Basically, you can setup the SocketWireless device so no commands are required to be
sent from the embedded side of the device. This allows seamless interfacing with legacy systems without the
need to modify the host device
Product Ordering Information
Product Description Region Order this
Product
3
MTS2BTSMI Serial-to-Bluetooth Module, C1 V1.2 – 5V (50 Pack) Global
MTS2BTSMI-L Serial-to-Bluetooth Module, C1 V1.2 – 3.3V (50 Pack) Global
Developer Kit
MTBTSMI-DK SocketWireless Bluetooth Developer Kit Global
Note: Each module is available as a single pack as well as the 50 pack listed above – Product Number MTSMI-UDK.
Developer Kit
The SocketWireless Bluetooth Developer Kit provides the ability to plug in the module and use it for testing,
programming and evaluation. The kit includes:
• Developer Board with RS-232 DB-25 Connector
• Wall Power Adapter
• Antenna
• RS-232 Cable
• Developer Kit CD