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AnswerRe: Seeking professional advise... Pin
Joe Woodbury9-Jul-20 7:41
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QuestionUsing bluetooth connection asynchronously - C++ Pin
Vaclav_7-Mar-20 8:49
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QuestionReturn indicates failure , errno indicates status? Pin
Vaclav_6-Mar-20 6:06
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AnswerRe: Return indicates failure , errno indicates status? Pin
k50546-Mar-20 6:34
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GeneralRe: Return indicates failure , errno indicates status? Pin
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GeneralRe: Return indicates failure , errno indicates status? Pin
Richard MacCutchan6-Mar-20 21:42
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GeneralRe: Return indicates failure , errno indicates status? Pin
k50547-Mar-20 4:55
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GeneralRe: Return indicates failure , errno indicates status? Pin
Vaclav_7-Mar-20 6:01
MemberVaclav_7-Mar-20 6:01 
Thanks, this is very good reference.
Error Messages (The GNU C Library)[^]
So far I am getting used to perror , it mostly gives good description of the state.
I am still unsure how to recover from some of those related to socket and bluetooth.
The moral of the story
check the return value first , then let perror describe the state.
perror does not always tells error, but state.
BTW the original error was due to my mistake not checking the remote bluetooth device address.
I was passing the device name and not the address!
Live and learn...

Cheers
GeneralRe: Return indicates failure , errno indicates status? Pin
Richard MacCutchan8-Mar-20 1:29
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GeneralRe: Return indicates failure , errno indicates status? Pin
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GeneralRe: Return indicates failure , errno indicates status? Pin
Richard MacCutchan20-Dec-20 23:48
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AnswerRe: Return indicates failure , errno indicates status? Pin
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QuestionUsing ba2str fails - why ? Pin
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GeneralRe: Using ba2str fails - why ? Pin
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AnswerSOLVED Re: Using ba2str fails - why ? Pin
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QuestionCan "cast looses precision " error be optioned out ? Pin
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