My issue is fairly simple to describe but I have no idea what the problem could be. So I got my FONA 3G and immediately after taking it out of the box, I connected the battery and I wired up my FTDI board (aka USB to serial converter), and then I plugged it into my USB port to try and establish communication. I just tried the most basic at command AT(using PuTTy). You're supposed to get an OK in response but the FONA doesn't appear to even notice that I'm trying to talk to it. I type AT and press enter and nothing happens at all.
The issue is most certainly not my FTDI board, I'm very experienced communicating with wifi modules and other GSM modules using PuTTy. So please don't be concerned with the setup. That's 100 percent definitely not the problem.
I was able to send AT commands after plugging the module into my laptop directly using the module's USB input, but there is still some issue with its UART. I haven't been able to send or receive any communications directly from RX and TX. It wont respond to any programs I load up onto my arduino. Its like the UART is asleep.
If you have experience with FONA 3G, please speak up and tell me what steps you took to get the UART to respond. What should the status indicator look like before its ready to receive commands? Any knowledge you have about the FONA3G module would be helpful.
As a side note, the FONA3G has a chip number. It is SIM5320a. I don't know if that helps. Most people know it as FONA 3G.