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A BluetoothTM-based Handset Wireless Data Acquisition System Abstract

An innovative data acquisition system that is suitable for laboratory work in electrical engineering/computer engineering communication coursework is detailed in this paper. The work makes use of currently available technologies including a BluetoothTM module in the communication path, and a Windows Mobile 2003 PDA as the system handset. Such items illustrate important data acquisition and data communication elements that are being more commonly found in today’s industrial environments. It is shown in the paper how the realization of key system elements spans a mix of hardware, firmware and software subcomponents. The standard elements of the project are discussed in the paper: the source, the channel and the receiver.

The analog source data stream for the project is generalized using multiple function generators to simulate source sensor output. A dedicated microprocessor assembles the digitized data according to the chosen transmission protocol. The protocol stream is transmitted from the microprocessor serial port to the serial port of a commercially available Bluetooth serial input module. A Bluetooth enabled PDA is used for reception and display of the acquired data. To ensure compatibility across a wide number of Windows Operating Systems, and possible extension of the work to a fully distributed and networked control environment, all PDA programming applications were created using the .NET Framework.

I. Introduction

Developers in industrial and consumer electronics along with faculty involved with research and teaching laboratory development are reaping the benefits of lower cost, greater complexity hardware, firmware, and software development tools. This advance is occurring along a broad front. This work focuses on one segment of this advance, handset based data acquisition devices.

The handset based data acquisition work represents a number of interesting technologies from recent electronic innovations. Such technologies are now being used in industry for wireless data logging, mobile data acquisition, and other applications. This work seeks to replicate a version of these concepts for use in a classroom laboratory. The chosen handset for the project is a Windows Mobile 2003 PDA device. The chosen communication channel for the project is wireless, with the transmission protocol being BluetoothTM. The data acquisition processor selected for use at the source was the Motorola MC9S12DT256 16-bit 25 MHz bus microcontroller unit (MCU). Laboratory function generators simulated the raw sensor devices.

While the span of the project is interesting, the variable depth of the project is equally interesting. The PDA Windows Mobile 2003 development environment used is the VisualStudio™, and .Net Framework™. The development environment supports a variety of programming languages, graphical user interface (GUI) forms, and objects. Extensive and complex with wide functionality, the environment permits the generation of end user

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Border, D. (2006, June), A Bluetooth Based Handset Wireless Data Acquisition System Paper presented at 2006 Annual Conference & Exposition, Chicago, Illinois. 10.18260/1-2--369