Feather/NRF9160: Help Desired with AT Command and SMS PDU
I am having trouble brining my modem online and receiving SMS messages. I sometimes get a message but then I do not get anymore. I used an online decoder, and the message is a lot of time the same messages I received before. A lot of my AT commands do not properly work. For example, sometimes they return ERROR and I know for a fact that the command worked. before.
Also, the SMS PDU is very complex. I have a lot of trouble with it. A lot of places just do not seem to really explain it in a way that is easier for me to understand. Do you perhaps have any resources or code examples? I can read code really well and understand it in many different languages if that would help.
 Why do I get random ERROR response on AT commands from the modem?
 What is the proper initialization sequence to bring modem online for messages reliably?
 Why do I keep getting the same SMS message?
 How can I decode the SMS PDU?
 Is there any way to reboot the modem via the AT commands? I’ve got a design and it is kind of stuck where all I can send and receive is AT commands and I tried disabling the radio interface and brining it back online with CFUN but like I said it doesn’t seem to work and I get errors sometimes on certain AT commands.