this post was submitted on 26 Nov 2023
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Wi-Fi is just a wireless protocol. You PROBABLY don't connect to a stationary wifi access point that is a relay to the wider internet, you are probably using a wifi connection from the towing device to an access point in the tow vehicle that's tied into the CAN bus of the towing vehicle to relay things like position, speed, breaking, road conditions, etc.
You could pretty easily do this all with a local LAN without needing any external Internet access.
It's called Ad-hoc WiFi. This is how almost all dash cams work these days. They are the access point you connect to. You then use whatever app required to view the videos on it. This is how the trailer would work for control.