There was something about port of Rotterdam in the story. Good luck with installing wifi hotspots all over shipyard or close by rail switches. You also need acc

There was something about port of Rotterdam in the story. Good luck with installing wifi hotspots all over shipyard or close by rail switches. You also need access points not that far away for ESP8266 or cable + big antena. On the other hand WiFi spectrum is already crowded with around 20 networks at any time in cities with god knows how many clients connected to it.