You seem to know more than others ...
Maybe in this way or similar (when it comes to sending codes):
Sub send_to_rs232()
Open "COM10,9600,8,N,1" For Output As #1
Print #1, some_code_char_01
Print #1, some_code_char_02
'... and so on
Close #1
End Sub
, but this matter is rather strange/unfamiliar to me ... sorry ...
In my opinion, you also need to have a proper/adequate 'control' to communicate with the electronic device ( ? mscomm.ocx, mscomm32.ocx, ietimer.ocx ?)
See this topic and related:
https://support.microsoft.com/en-us/...s-oncomm-event
... and also in the forum ...
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