With a hotspot, you are playing WiFi, only mobile. Theoretically, it should work, but I wouldn't recommend it. On the one hand, there are enough reasons to get a stable wifi router and on the other hand, you can only access the functions of the Roboroc with a constant network. For example, starting a cleaning process on holiday or your cleaning routines. So you can try it, but the advantages of a home network outweigh the disadvantages (smart tvs, lights, cleaning robots, stable network, enough ports, stability and so on).