This is a very similar question to one already asked, but it is different in that I want the USB dongle to provide internet access to the RPi while the RPi AP still operates.
I am trying to set up a navigation system on my boat using OpenPlotter and OpenCPN using 2 RPi 3+'s. It all works wonderfully as a standalone network, but without internet access.
I'd like to add an internet connection to provide internet access when I'm in port so that I can browse the web. SO I added a TP-Link dongle which is recognized and I can attach it to my home network using the standard process. Running ifconfig returns a local 10.10.10.1 for the local network and 192.168.abc.xyz for the home network.
But whenever I open the browser I get a connection error no matter the internet site - Google, Facebook, Amazon, ...
Clearly I must be doing something incorrectly, but I haven't a clue.