X-Git-Url: http://git.rot13.org/?p=air-quality;a=blobdiff_plain;f=mh-z19b.pl;h=c2f8ffe302d16299fc7f41fb5292719af320a764;hp=b71b3656959966f9f6b9ddec7fdaadd2297e16ec;hb=bcefa9e3896d896801b4361aa7a03c17eae60ad3;hpb=a25b1d3919cbaf5ac569df06a5c35e32c0445af3

diff --git a/mh-z19b.pl b/mh-z19b.pl
index b71b365..c2f8ffe 100755
--- a/mh-z19b.pl
+++ b/mh-z19b.pl
@@ -6,7 +6,7 @@ use Device::SerialPort;
 use Time::HiRes;
 use Data::Dump qw(dump);
 
-my $port = shift @ARGV || '/dev/ttyUSB0';
+my $port = shift @ARGV || '/dev/serial/by-path/pci-0000:00:1a.7-usb-0:5.3.4:1.2';
 my $influx_url = shift @ARGV || 'http://10.13.37.229:8186/write?db=telegraf';
 $influx_url = 'http://10.13.37.92:8086/write?db=rot13';
 
@@ -16,7 +16,7 @@ $s->databits(8);
 $s->parity('none');
 $s->stopbits(1);
 $s->handshake('none');
-$s->read_char_time(0);
+$s->read_char_time(1);
 $s->read_const_time(10);
 $s->debug(1);
 
@@ -29,7 +29,9 @@ while (1) {
 	die $! if ! defined($len);
 	if ( $len > 0 ) {
 		my @v = unpack('C*', $string);
-		#warn "# $len ",dump($string), dump( @v ), $/;
+		if ( $#v < 8 ) {
+			die "# $len ",dump($string), dump( @v ), $/;
+		}
 
 		my $sum = 0;
 		foreach my $i ( 1 .. $#v - 1 ) {
@@ -38,7 +40,7 @@ while (1) {
 		}
 		$sum = 0xff - $sum + 1;
 
-		my $checksum = $v[8] || die "no checksum";
+		my $checksum = $v[8];
 		my $co2 = $v[2] * 255 + $v[3];
 		if ( $v[0] == 0xff && $sum == $checksum ) {
 			my $influx = "mh-z19b,dc=trnjanska co2=$co2 $t";