A command and response in PuTTY is enough to prove serial is communicating correctly.
If you enter $SC 40 and Receive OK, possibly with other characters such as ^xx the command was received and processes.
If you enter something random and receive NK (Not Okay), the command was received but not valid
Achala Amarasinghe
Hi,
is there a program to run a check on the serial communication instead of individual commands (in PuTTY - ie -$GV .... etc) which will give a result serial communication OK or Failed?