My tplink AC 1750 c7 archer, works well in AP mode. I wonder how I can secure the AP. It is only used for software updates of my TeslaY. I have created a guest account and have chosen 5Ghz, because of

Hi I am a new member of this forum. I bought a second hand router TPlink AC 1750 C7 to configure it to accespoint in my garage, so I have a better wifi connection for software update of my electric ca