WARNING: WaitCommEvent () Failed with the following error: the handle is invalid-CodePudding

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WARNING: WaitCommEvent () Failed with the following error: the handle is invalid

Time：10-31

WARNING: WaitCommEvent () Failed with the following error: invalid handle the Port: 4
What does it mean, how to operate

CodePudding user response:

Handle to access parameters are valid

CodePudding user response:

For a long time, haven't solve?