Mobile system for spatial orientation of people with vision disorders

: pp. 67 - 77
Lviv Polytechnic National University, Computer Engineering Department

Based on the analysis of existing systems for helping blind people to navigate in space, an understanding arose in the creation of a new system that would have a completely different approach to the interaction of a blind user with the existing world. Such a system, having the function of a voice message, provides a blind person with information and thus helps him orientate in space. Existing approaches focus on providing sound signals, which only make it possible to redirect a person in a certain direction, prohibit or allow movement. Therefore, there was a need to develop such a mobile system that would help people with visual impairments to navigate in the room based on the information they received in the form of a voice message. The object of the research is methods and means of helping blind people in the orientation of the premises using the received signal level indicator RSSI (Received Signal Strength Indication). For Wi-Fi and Bluetooth 4.0 devices, RSSI is the only parameter that allows you to measure the distance from the device to a base station or beacon.

The developed mobile system combines components such as web client, server application, databases and mobile application to operate the Bluetooth ESP32 module. Based on these components, this article provides a methodology for building a mobile system, describes the development environ- ment with its functions and capabilities, provides a detailed description of launching and configuring programs with explanations of key points in the system’s operation.

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