This thesis was created in collaboration with Gorenje d.o.o., and it relates to an internal project in the company, t.i. the design of a system for recognising the location of household appliances at the end of their way on a production line, for the purpose of testing. Because of the nature of these devices the method used, in the creation of this thesis, was trilateration, using Wi-Fi sensors. The thesis was split into multiple parts: design, programming and testing the system. The first thing presented is the process of designing the system, based on given specifications and explanations for why each system component was selected. Programming took place in two parts; setting up ESP32 Wi-Fi sensors and creating a library using C#. Testing the system took place in phases, with gradually more important tests, in real environments in Gorenje. The results of a short test implementation on a production line were presented at the end of the thesis.
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