Wio LTE CAT M!/NB-IoT + TCP socket

NB-IoT
1

Hi,

I am currently trying to connect my board with a TCP server but I receive the “+CME ERROR: Operation not allowed.”

I am doing this AT commands:
check_with_cmd(“AT+CFUN=1\r\n”, “OK”, CMD);
check_with_cmd(“AT+CGDCONT=1, “IP”, “internetm2m”\r\n” , “OK”, CMD);
delay(10000);
check_with_cmd(“AT+COPS=1,2,“26806”\r\n”, “”, CMD);
delay(10000);
check_with_cmd(“AT+CGATT?\r\n”, “”, CMD);

and then:

check_with_cmd(“AT+USOCR=6\r\n”, “”, CMD);
check_with_cmd(“AT+USOCO=1, “x.x.x.x”,20000\r\n”, “”, CMD);
check_with_cmd(“AT+USOWR=1,5,“TESTE”\r\n”, “”, CMD);

the result is:
11:23:52.501 -> AT+USOWR=1,5,“TESTE”
11:23:52.501 -> +CME ERROR: Operation not allowed

any thoughts?

Best Regards!
Gonçalo

2

Hi Gonçalo,

Here are a few thoughts, or rather, questions:

  • which module and FW are you using? Are you using NB-IoT, Cat-M or 2G?
  • assuming you are on NB-IoT and using a Sara R410 or similar:
    can you send the output of these commands to see if you are connected and how the radio is at your place?
AT+CGATT?
AT+CGDCONT?
AT+CGPADDR
AT+UCGED=5
AT+UCGED?
AT+CESQ

Can you also check if you are trying to send data in Hex mode?

AT+UDCONF=1

Finally, are you sure that the USOCR command is always returning socket 1? Or will the program take the socket from the USOCR output?

Cheers!

3

Hi,

I am using NB-IoT. I already got the connection and send and receive messages. I think I did not wait time enough to the connection establish. I was reading the documentation and the Wio Lte Cat M1/NB-IoT just started sending messages to the server.

Thank you for your reply.

Best regards!
Gonçalo