FONA Test SETUP not working

[edwinf]

I follow the connection as in
https://learn.adafruit.com/adafruit-fon ... ing-to-usb
when I type AT into the terminal program, there is no response.
Could I find out what could be the possible error?
This is my connection

20230915_165328.jpg (687.62 KiB) Viewed 822 times

. I am using the adafruit serail to USB dongle,

Thank you