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FONA Test SETUP not working

Posted: Fri Sep 15, 2023 6:36 am
by 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
20230915_165328.jpg (687.62 KiB) Viewed 1305 times
. I am using the adafruit serail to USB dongle,

Thank you