I think we are getting close. Below is the sensor code that sends data to the Perl script. The perl script changes the state and color of the button. However my other button code still changes the color of the button whether the sensor is tripped or not. 

if ($data =~ /(?<![\w-])ON(?![\w-])/i) {

$btn1->configure(-background => "gray", -foreground => "black"); 
$btn1->configure(-state => "disabled");                    

print "ON\n";
}    

if ($data =~ /(?<![\w-])OFF(?![\w-])/i) {

$btn1->configure(-background => "green", -foreground => "black");
$btn1->configure(-state => "normal");                             

print "OFF\n";
}

[download]

And this code below still changes the color of $btn1 whether it is disabled or not. It's fine to change the color when it's enabled. It's NOT fine to change the color when it's disabled. 

sub chg_btn { 
$btn1->configure(-background => "green", -foreground => "black");
}

[download]

In reply to Re^2: Perl Tk Button Disabled by PilotinControl
in thread Perl Tk Button Disabled by PilotinControl

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