Hi, I have my fona 3G set up with the raspberry pi, using a USB to TTL serial cable for the connection. For some reason when I use the screen terminal, my commands are not displayed, nor is there any type of returned command. I have tried doing the same with the fona 808, and I get the "ok" response when I type "at" (upgraded to FONA 3G for network compatibility). I used the wiring setup provided in this tutorial:
https://learn.adafruit.com/fona-tetheri ... ack/wiring
Does anyone know what I could be doing wrong? Has anyone run into the same issue?