Remote Test and Measurement Access via Acoustic Coupling in Non-WiFi Accessible Environments

Van den Ham, C. (2024) Remote Test and Measurement Access via Acoustic Coupling in Non-WiFi Accessible Environments. [USQ Project]

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Abstract

This research project investigates the feasibility of acoustic data transfer in areas where wireless and wired connections are restricted or non-existent. The project is a proof of concept for a mobile device, operated by a technician, to send and retrieve data from an embedded field device, examining the speed and robustness of data transferred between devices under different environmental situations.

This concept has potential applications in scenarios where an embedded device is located in a remote area, and data needs to be retrieved for troubleshooting or monitoring purposes. Additionally, it could be used for semi-remote firmware updates, where the device is accessible to a technician on-site, but remote from the developers.

The data transfer process follows this sequence: The mobile device accesses a text (or JSON) file, converts the text to binary data, modulates the binary using frequency shift keying (FSK) into an audio file, and plays the audio to the embedded device. Once initiated, the embedded device listens for the audio file, records the audio to a buffer, demodulates the FSK signal into binary data using Goertzel’s Algorithm, Fast Fourier Transform (FFT) or a bandpass filter, and converts the binary data back to text. It then reads the message from the mobile device and responds by sending an audio signal back (either an acknowledgement of received update, or with diagnostic data) following the same process.


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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Supervisors: Leis, John
Qualification: Bachelor of Engineering (Honours) (Electrical & Electronic)
Date Deposited: 18 Mar 2026 05:33
Last Modified: 18 Mar 2026 05:33
Uncontrolled Keywords: acoustic data transfer; mobile device
URI: https://sear.unisq.edu.au/id/eprint/53172

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