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Hey y'all. o/
I followed a video instruction to initiate a simple COM transmit/receive operation.
Communication is OK but in converting values to hexadecimal, His/Her code has no errors in building procedure but mine doesn't recognize the "DataType". I looked up the headers and imported libraries and found that we were matched.
How can I rectify it???
Attachment 181092
Well, it's exactly as the error messsage in your screenshot says: "datatype" is not declared. At least not in the code you posted. Please use code tags next time. These can be inserted by clicking the "#" button in the toolbar above the forum message you're about to post. It would also be helpful if you linked to that video you mentioned.
You need to go back to the tutorial and find out where they declare that variable. If they don't state it explicitly then you should put some thought into it and work out what that variable represents and what type it is and where you think it should be declared. I don't know why you would be trying to write code to use a SerialPort if you don't understand basic things like declaring variables. It's a bad idea to try to run before you can walk.