nrf 9160 Serial LTE Modem

[nordicuser91]

Hello All,

I used the sample Serial LTE modem code and downloaded it to nrf9160. Can some please help me with a sample AT commands to send to tcp/udp server and how should I receive it on the server (like a basic implementation). It would great help.

Thanks

Regards

Nordic user

[Heidi]

Hi!

The documentation shows which AT commands are used in this sample, see here. So you can use any of these. 

how should I receive it on the server (like a basic implementation)

 This really depends on what you're planning to do.

What are you trying to achieve with this application? Could you give some specifics?

Best regards,

Heidi

[nordicuser91]

Thanks for the reply Heidi and apologies for the late reply. Let me frame the question in a different way. I am getting error when I type in AT command mentioned in the post. Could you please give me an example. of the AT Command which you send specifically which doe work and also I am not sure about the what does "op" and "type" mean in "AT#XSOCKET=<op>[,<type>]".

Thanks in advance

[Heidi]

Okay, I see.

I'm not sure about the answer, and for some reason, I can't get the sample up and running at the moment. We're short on staff here at Nordic at the moment due to the holidays so I will have to get back to you on January 6th.

Best regards,

Heidi

[nordicuser91]

Thanks Heidi, Looking forward to hear from you on 6th Jan. 

Happy New Year,

Best Regards

Nordic User

[Heidi]

Hi!

I have attached a more thorough documentation of the individual AT commands. 

slm_at_commands_v1.1.xlsx

And here is an example of how to test connecting to a server over TCP. 

//Opening socket and type SOCK_STREAM (1)
at#xsocket=1,1 

//Response: #XSOCKET: <handle>[,<protocol>]
at#xsocket?

//Bind socket with local port
at#xbind=<port>

//Connect to TCP server with url and port
at#xtcpconn="testing.example.com", <port>

//Respose: #XTCPCONN: <status> (1: connected, 0: disconnected)
at#xtcpconn? 

//Send data over TCP connection
at#xtcpsend="Testing" 

//Receive data over TCP connection
//<length> is requested number of bytes
//<timeout> is timeout value in seconds. If not specified, then system default
at#xtcprecv=<length>,<timeout> 

//Closing cosket
at#xsocket=0

//Response: #XSOCKET: <handle>[,<protocol>]
at#xsocket?

Let me know if this works for you!

Best regards,

Heidi

[nordicuser91]

Hi Heidi,

Happy new Year! Thanks for giving me the list of At commands. I tried on my board, but it doesn't seem to work on my end. 

Please let me know if I could do something with this. I updated the modem firmware too. But still gives me an error. Might be syntax issue.

Thanks

Nordic User

[Heidi]

Hi! No, it's not a syntax error. Are you sure you are connected to a network?

Could you provide me with a full log file from LTE Link Monitor by pressing this button - it's easier for me to see what's going on.