at_client routine, the test at instruction does not return any information.

[peter.min]

Hi Didrik Rokhaug,

sdk:ncs v1.2

Routine path:D:\ncs\v1.2.0\nrf\samples\nrf9160\at_client

The routine is attached:

at_client.rar
The test results are shown in the figure below:

After sending multiple 0A0D instructions, the program does not return a value after sending other normal instructions again.

This error will cause the program to become stuck in the event of a serial communication program exception.

This phenomenon can cause the customer to misdiagnose that there is a bug in the AT instruction.

Please further increase the module AT instruction fault tolerance mechanism.

Kind regards, Peter.Min

[peter.min]

Hi Didrik Rokhaug,

1. I already know the reason for this problem clearly and agree with you.
2. However, compared with other manufacturers in China module, there is no such problem.
3. For users accustomed to using other manufacturer modules in China, sending empty at instructions and then sending other instructions again does not return data, is a serious bug.
4. Please fix this problem in time to avoid customers during the evaluation testing phase, thinking that product performance is unstable.

Kind regards, Peter.Min