find serial port and connect to it

diff --git a/zc-serial-config.pl b/zc-serial-config.pl
new file mode 100755 (executable)
index 0000000..1d21ead
--- /dev/null
+++ b/zc-serial-config.pl
@@ -0,0 +1,57 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+# sudo apt install libdevice-serialport-perl libdata-dump-perl
+use Device::SerialPort;
+use Time::HiRes;
+use Data::Dump qw(dump);
+
+my $debug = $ENV{DEBUG} || 1; # FIXME 0
+$|=1;
+
+my $port;
+
+print "Plug in USB serial adapter connected to ZC sensor\n";
+
+open(my $udev, '-|', 'udevadm monitor -k');
+while(<$udev>) {
+       chomp;
+       if ( m{\sadd\s.*/(ttyUSB\d+)\s} ) {
+               $port = $1;
+               print "Found new serial port $port\n";
+               sleep 1;
+               last;
+       } else {
+               print "## $_\n" if $debug;
+       }
+}
+
+my $s = new Device::SerialPort( "/dev/$port" ) || die "serial /dev/$port: $!";
+$s->baudrate(115200);
+$s->databits(8);
+$s->parity('none');
+$s->stopbits(1);
+$s->handshake('none');
+$s->read_char_time(100);
+$s->read_const_time(15000); # ms - 1.5s
+$s->debug(1);
+
+while (1) {
+
+       my $string = $s->lookfor;
+       if ( $string ) {
+               $string =~ s{\r$}{}; # remove cr
+               my $t = int( Time::HiRes::time() * 1_000_000_000 );
+
+               print "# $string\n" if $debug;
+
+               if ( $string eq 'L620 power on fail' ) {
+                       print "ERROR: $string\n";
+               }
+       } else {
+               sleep 1;
+       }
+};
+
+
+$s->close;