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Re^6: serial raw write problem with multidigit decimal and strings

by ultibuzz (Monk)
on Mar 10, 2013 at 21:49 UTC ( #1022696=note: print w/replies, xml ) Need Help??


in reply to Re^5: serial raw write problem with multidigit decimal and strings
in thread serial raw write problem with multidigit decimal and strings

they are the same for perl, but they are not the same for the device on the serial port.
the device treats them differently.

the issue is not really perl, but what ways there are to send the same data in different ways, which might get interpreted differently.

a more confusing example:

print "\x36" is 6 in perl, is 54 on device if decimal is expected print "6" is 6 in perl, is 6 on device

the issue is primary how the device handels the data, which is different on most functions as well.
kind regards - alex

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[Cosmic37]: now I have tried another blunder - can anyone explain why I am such a dunderhead?
[Cosmic37]: if ( $line =~ /$mydt/ ) { print $line; }
[Cosmic37]: I try to match successive date times stored in variable $mydt
[Cosmic37]: I guess it is searching for the string "$mydt"
[Corion]: Indeed cool, erix ;)
[Cosmic37]: rather than the value of $mydt which is a date time strong such as 2016-01-01 12:30:56
[Corion]: Cosmic37: No, but maybe $mydt doesn't contain what you think it does, or it contains characters that are special in a regular expression? Try if( $line =~ /\Q$mydt\E/) { ... for a literal match
[Cosmic37]: I mean string grrr
[Corion]: Maybe add an else branch in which you print what the values of $line and $mydt are?
[Cosmic37]: ah thank you I will try

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