## 6 Conclusions  
This paper presents an idea for the localization and identification of an object using data fusion. The system has been built, and its Technology Readiness Level is 6 (TRL6), i.e., real-life tests have been performed in a wide-open area.  
The system consists of a base station and mobile units with GPS and radio communication modules. A number of research tasks focus us on important requirements but are not listed by the industrial partner. One is to place the mobile unit on the worker's uniform where it should be attached, i.e., the mobile unit cannot be in the pocket or have free rotation with respect to the sphere due to the GPS antenna. The positioning accuracy depends on the radar system, so the line of sight must be guaranteed, i.e., the positioning accuracy behind obstacles such as cars, airplanes, or even another employee.  
The first prototype of the wireless system has acceptable dimensions, and the battery life is much longer than a single work shift. The requirements provided by the industry partner have been met, i.e., low power consumption, sufficiently high communication range, low manufacturing cost, and acceptable physical dimensions. However, the technology is still at Technology Readiness Level 6 (TRL6), and there is still room for improvement in areas such as operating speed and size.  
\begin{table}
\begin{tabular}{c c} \hline \hline
**Subsystem/Module** & **Current [mA]** \\ \hline Wireless module (transmitting) & 700 \\ Wireless module (receiving) & 35 \\ GPS receiver & 34 \\ Microcontroller & 19 \\ \hline \hline \end{tabular}
\end{table}
Table 13: Current consumption for particular modules—prototype 2.  
\begin{table}
\begin{tabular}{c c} \hline \hline
**Subsystem/Module** & **Current [mA]** \\ \hline Wireless module (transmitting) & 138 \\ GPS receiver & 34 \\ RF module (receiving) & 20 \\ Microcontroller & 20 \\ \hline \hline \end{tabular}
\end{table}
Table 14: Current consumption for particular modules—prototype 3.  
**Author Contributions:** Conceptualization, L.C., D.E.G. and K.T.; methodology, L.C., D.E.G. and K.T.; software, L.C.; validation, D.E.G.; formal analysis, K.T.; investigation, L.C., D.E.G. and K.T.; resources, L.C. and D.E.G.; data curation, K.T.; writing--original draft preparation, D.E.G.; writing--review and editing, L.C.; visualization, L.C.; supervision, D.E.G. and K.T.; project administration, D.E.G.; funding acquisition, D.E.G. and K.T. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research and the APC was partially funded by the Reactive Too project that has received funding from the European Union's Horizon 2020 Research, Innovation, and Staff Exchange Programme under the Marie Sklodowska-Curie Action (Grant Agreement No871163), which is co-financed by the program of the Minister of Science and Higher Education, entitled \"PMW\" in the years 2021-2025, contract no. 5169/H2020/2020/2.  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** Data is contained within the article.  
**Acknowledgments:** This research and the APC was partially funded by Statutory Research funds from the Department of Electronics, Electrical Engineering, and Microelectronics, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Gliwice, Poland.  
**Conflicts of Interest:** The authors declare no conflicts of interest.