Please help me with this issue. : Send this instruction using the at_cmd_write function: AT-CGDCONT? Returns an error value

[peter.min]

I sent the AT instruction back correctly with the serial tool sscom5.13.1

I sent the AT instruction error with the secondary function:
at_cmd_write ("AT-CGDCONT?," buf, sizeof (buf), s.at_state);

Attachments are serial tools and code

15_hello_world_at_lte.rar

sscom5.13.1.rar

See figure below for testing

[Simon]

I looked at your images, and I'm a little confused. You said at_cmd_write ("AT-CGDCONT?," buf, sizeof (buf), s.at_state) returns an error. However then the line printk("AT command error:...") should return. However, it does not, in the SSCOM terminal. Instead ".... step 11 =" is printed

Could you elaborate on what goes wrong?

[peter.min]

1. Execute this function:
at_cmd_write ("AT-CGDCONT?,""buf," sizeof (buf), s.at_state)

2. Normally:
Step11 should return an IP address similar to the following: .CGDCONT: 0, "IP", "cmnbiot", "100.113.74.90", 0,0,0

3. Error case, as you can see in the test: "Step 11"
The return value at this point should be 0

4. How to do it to return an IP address similar to the following image:
CGDCONT: 0, "IP", "cmnbiot", "100.113.74.90",0,0

[Simon]

It seems like you solved this issue in this ticket by adding a delay. You added a new question (question 2.) about this, but I'll address it in the mention ticket.

Should we close this?

[peter.min]

This issue can be closed, mainly after opening the RF attached to the base station takes a while