#!/usr/bin/perl use strict; use Device::SerialPort; use FileHandle; my $fh = FileHandle->new; my $port = Device::SerialPort->new("/dev/ttyACM1"); $port->databits(8); $port->baudrate(57600); # <-- match to arduino settings $port->parity("none"); $port->stopbits(1); $port->dtr_active(0); my $i=1000; my $rt = 0; my $rh = 0; my $it = 0; my $foos=""; select(STDOUT); while($i> 0) { my $inp = $port->lookfor; if($inp ne "") { if($inp =~ /Remote Temp:/) { $rt = $inp; $rt =~ s/Remote Temp://; print "inp=$inp\n"; print "rt=$rt\n"; $foos="$rt does not print rt \n"; print $foos; print "rt=$rt\n\n"; } } } $port->close; undef $port; #### inp=Remote Temp:22.30 rt=22.30 does not print rt rt=22.30