I've been using for a while a Huawei USB dongle as an Internet provider for my Raspberry Pi, which I have connected to my solar panels system at my country house (which doesn't have an accessible Internet connection, just mobile data); and gives me updates all the time through EmonCMS and Home Assistant, which I have installed on another Raspberry Pi at home. The issue is that the USB dongle is a bit bulky, and doesn't fit very well in the box that I'm using for the Pi. So after a bit of research (not enough, definitely), I finally decided on buying one of those SIM800C shield modules which are sold in AliExpress and are really cheap. The issue is that I thought that there were a lot of good tutorials on how to use the module, but I haven't figured out yet how to use, neither with AT commands nor as the final use I want (as an Internet card).
If any of you could take my a hand I'll be really pleased. Greetings.
