AN INTUITIVE ANDROID-BASED SOFTWARE DESIGN FOR POTENTIOSTAT-BASED URIC ACID TESTING PLATFORM

• Main Author: Fransiscus Munthe, Michael
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73872
• Institution: Institut Teknologi Bandung

Uric acid, as a potential biomarker that continues to be developed, requires an advanced instrument to carry out readings and assist analysis. The instrument is a portable testing platform that has been designed on the basis of a potentiostat. However, under current conditions, the existing test platform has never been tested on a biosensor with the target analyte in the form of uric acid, so electrochemical analysis and concentration measurement cannot be carried out. Then other needs arise regarding the future development of wearable technology, so that the initiation of this development starts on a portable platform. But in fact, the platform that has been created as hardware cannot run alone, which requires another component, namely software to display the results of the measurement process and as user control to use the application. So this article is here to focus on developing a portable testing platform from the software side. The software used is made using MIT App Inventor, which is an integrated application development environment. Then this software is formed by having two main subsystems as its architecture, namely the device management system subsystem, which acts as the back-end, and the user interface subsystem, which acts as the front-end of the application. This device management system subsystem will directly relate to the hardware, where there is a communication module using Bluetooth communication to carry out two- way data transfers, and then all data packets in each process are stored in local variables using the integrated tinyDB, which is part of the device module. storage. On the other hand, the subsystem that will interact directly with the user is the user interface subsystem, which consists of three modules: the control interface module, which is related to user input; the mode module, which is related to two types of analysis processes, namely CV (cyclic voltammetry) and CA (chrono amperometry), to display the output of each; and the last module, namely the notification module, as a provider of important information while the application is in use. From this architecture and function, the implementation of the number and function of application pages is made by taking into account the finite state machine that has been created. The design and layout of each component on each page is kept as simple as possible but still attractive. The scheme for using the software is quite simple, which starts with turning on the hardware and dripping uric acid on the sensor that has been installed. Then the user performs a simple pairing of the smartphone with the potentiostat hardware. After the Bluetooth is connected, the next step on Android is for the user to choose the type of user, which iv is divided into "user" and "analyst" types. The "user" menu takes the user to a one- click measurement of uric acid concentration. In another menu, namely the "analyst" menu, the user can enter parameters according to each type of analysis (CA and CV) according to measurement needs. The test results show that the designed software is successful in displaying measurement result data sent from the potentiostat hardware. All outputs are successfully displayed consisting of uric acid concentration values (for the "user" menu), electrochemical CV and CA analysis graphs, and CSV data containing all measurement values obtained (for the "analyst" menu). The application has also been tested on several respondents, consisting of PPNN ITB researchers and ITB biomedical engineering students, to ensure that the application is truly intuitive and responsive when used by users.