Going through the forums, one possible issue could be the newer firmware updated some settings which disabled some USB ports. Could be due to remapping of memory addresses or ignoring old configurations. I’m just guessing as I do not have the time to investigate.
It’s such a unpleasant experience and now my module cannot even work normally.
I am sure I’m not the first to experience this issue but somehow I cannot find any solution. And Quectel Support is not very helpful.
There’s so many versions, and firmware has to be requested and sent through email. Why is that? Why isn’t there a page for individual modules and all the firmware download with change logs? Why do we have to comb the forum reading issues and only realizing the issue is still not closed?