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QuestionDevice on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon27-Sep-16 8:18
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AnswerRe: Device on RS232 only responds to first send request (Visual C++) Pin
jeron127-Sep-16 10:41
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon27-Sep-16 11:38
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
jeron127-Sep-16 11:44
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon27-Sep-16 12:10
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
jeron127-Sep-16 13:28
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon28-Sep-16 12:30
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
jeron129-Sep-16 4:19
Memberjeron129-Sep-16 4:19 
Does WriteFile say bytes sent > 0? Do you see data on the wire (a breakout box might be handy)?

Can you connect a PC with a terminal program in place of the device (with a null modem cable) so you can see (and verify) what, if anything is being sent by your program and manually send the data you expect to get. A scenario where you could set break points and see exactly what code is being executed and the value of the variables.
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon29-Sep-16 4:43
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AnswerRe: Device on RS232 only responds to first send request (Visual C++) Pin
leon de boer27-Sep-16 17:18
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GeneralRe: Device on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon29-Sep-16 4:45
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AnswerRe: Device on RS232 only responds to first send request (Visual C++) Pin
David MacKinnon29-Sep-16 4:40
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Question_tcscpy_s and unused buffer part Pin
leon de boer27-Sep-16 5:39
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AnswerRe: _tcscpy_s and unused buffer part Pin
Richard MacCutchan27-Sep-16 6:26
mveRichard MacCutchan27-Sep-16 6:26 
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leon de boer27-Sep-16 18:36
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AnswerRe: _tcscpy_s and unused buffer part Pin
Richard MacCutchan27-Sep-16 6:33
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AnswerRe: _tcscpy_s and unused buffer part Pin
Chris Losinger27-Sep-16 7:28
professionalChris Losinger27-Sep-16 7:28 
GeneralRe: _tcscpy_s and unused buffer part Pin
leon de boer27-Sep-16 20:24
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GeneralRe: _tcscpy_s and unused buffer part Pin
David Crow27-Sep-16 8:20
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GeneralRe: _tcscpy_s and unused buffer part Pin
leon de boer27-Sep-16 18:35
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QuestionRe: _tcscpy_s and unused buffer part Pin
David Crow28-Sep-16 2:35
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AnswerRe: _tcscpy_s and unused buffer part Pin
leon de boer28-Sep-16 17:47
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GeneralRe: _tcscpy_s and unused buffer part Pin
David Crow28-Sep-16 18:09
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GeneralRe: _tcscpy_s and unused buffer part Pin
leon de boer28-Sep-16 18:14
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GeneralRe: _tcscpy_s and unused buffer part Pin
David Crow29-Sep-16 3:10
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