The southbound device sends an AT command to SoftRadio through the serial port. As a result, SoftRadio does not display any information. What are possible causes? (Multiple choice)

The southbound device sends an AT command to SoftRadio through the serial port. As a result, SoftRadio does not display any information. What are possible causes? (Multiple choice)
A . SoftRadio received an unrecognized AT command
B . There is a problem with the southbound connection to P ‘and SoftRadio did not receive the data
C . The AT command which has been sent did not end with /r/n
D . All of the above is possible

View Answer

Answer: BC