I’m trying to use a Raspberry Pi 3 with the 3G-4G/LTE Base Shield V2 set with the EC25 Mini PCle 4G/LTE Module.
It worked well on the USB port but I can’t make it work with the serial GPIO for some reason. I read it could come from the mini serial that is used by default on the GPIO. Any idea of how to use it directly?
I’m using it via USB port but how can I make it work via GPIO pins?
Thank you for your help.