A smart device to collect breath data in real-life situations

Sudhir Shrestha

Intelligent Systems Lab, Sonoma State University, Rohnert Park, CA, USA

Poster PDF


Research and development in breath-based diagnosis and monitoring devices for diabetes and other diseases have recently seen an exponential growth. This has created a need in the scientific communities for a sensor device that allows a large scale breath data collection from patients in real-life situations. This is particularly important as the advances in machine learning and artificial intelligence has enabled complex sensor pattern based recognitions and classifications. The sensor device reported in this invention has a small form-factor (handheld) that can take breath input, record sensor readings, and wirelessly send data to the cloud. The device is easy to use and can be given to the patients to conduct self-tests with breath at home. The device has three slots for chemical/volatile organic compounds sensors (which can be expanded as needed), sensor interface that can be programmed to match the sensor characteristics, and a program for automatic calibration of sensors. The device comes with three VOC sensors, which can be switched out based on the study need. The device can be easily programmed to package the data, format it, send it to the cloud for automatic logging on cloud databases. The microcontroller on the board can be reprogrammed with trained algorithms for real time classification of patient breath and make predictions. Thus, this device can be used for verification and further training of the algorithm, as well as implementing the trained algorithms and turning into a monitoring and/or diagnostic device without any hardware modifications.



  • First of all, you did an interesting work!

    Looks great and useful. 

    I have two questions with curiosity.

    Your device must be reusable with multiple times, and what would be the washing(cleaning) method ? 

    And, are there any functions like calibrating, depending on ambient conditions or even temperature?


    Again, your device is really impressive! 


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  • Currently, we are not reusing the device due to COVID-19 related concerns. However, the device could be reused in the future. The sensors can be cleaned by blowing clean air. The housing can be cleaned with antibacterial wipes or could be replaced with a new one. The mouthpiece is not reused.

    Yes, the sensors can be calibrated for ambient conditions.

    Thank you!

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