How to use SCI in C2000

Hello,
I am using SCI block in C2000 to transmit AT command to a WIFI module(esp32-C3) and receive response from it. The AT command ends with “\r\n”. I can send each character at a relatively slow speed to ensure that each character is received by the WIFI. But I do not know how to correctly receive each character from WIFI. I know the methods of using FIFO interrupts.
How to transmit string more easily through SCI? Can CSV block do this?How to correctly recieve string? Is there a demo?
I am looking forward to your reply.

Best Regards,
Pauleen