I actually have this HAT, which also connects via micro-USB to my Raspberry Pi 3 Model B +, but I think is called a HAT because it can get bolted on top of a raspberry pi zero.
I did manage to find instructions here, but there is an assumption that ttyUSB is up in the /dev folder. I don’t see ttyUSB populating inside my /dev folder unless I attempt the ftdi_sio, which from what I’ve read is not the right way of doing this (hence so many errors from dmesg).
I’m trying to find the right way/instructions to get ttyUSB up after I’ve connected the module to the USB port of the pi.