University of Twente Student Theses


Making a breathing wearable wireless

Smit, T.T. (2020) Making a breathing wearable wireless.

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Full Text Status:Access to this publication is restricted
Embargo date:1 August 2022
Abstract:The Breathline is a breathing wearable which monitors diaphragmatic breathing throughout the day to encourage and support users with correct breathing. Diaphragmatic breathing is proven to have positive effects on physical and mental health. Currently, data from the Breathline can only be retrieved over a USB connection or wirelessly with a dongle. Making the Breathline completely wireless is the goal of this project. The following research question helps to reach this goal. How can the data communication of the Breathline breathing wearable be made wirelessly to facilitate real-time displaying of measurement data on portable devices? With the help of a literature and market research, the decision is made to utilise Bluetooth Low Energy as a wireless communication technique. The development of wireless functionality is guided by the Creative Technology Design Process. This process starts by analysing the problem which shows that Breathline users have different technical skills. It also identifies that setting up a wireless connection is an important activity in this context. Next, requirements are set for the development of a system that receives data from the Breathline and transfers this to a smart device. Requirements for the technologies to be used, connection stability and user interaction are set. For the realisation of a proof-of-concept of the system, a special GATT profile design is made. The GATT is part of the Bluetooth Low Energy protocol stack. Parts of this stack are explained in depth. The profile is implemented on the Breathline with an RN4871 Bluetooth Module by Microchip Technology. In parallel, an application is developed in the Android framework, implementing the same GATT design. Also, a novel method of establishing a connection between the Breathline and a smart device is developed. The Breathline will go into advertising mode by shaking it. A user test is done, which shows that users can set up a connection using this method. However, also concerns about its security rise. In the end, the set requirements are checked to be met. It is found that most are. To conclude, a system is created, in which a Breathline-like device and an Android application can communicate sensor information gathered by the Breathline in real-time. Which shows that the Breathline can be made wireless to facilitate real-time data communication by using Bluetooth Low Energy. In the last chapter, suggestions for future work are made.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Programme:Creative Technology BSc (50447)
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