X-Git-Url: http://git.rot13.org/?p=air-quality;a=blobdiff_plain;f=pms3003.pl;h=7c0205e7a3216d09b0d9a759927bc735b655fa38;hp=1c5067b552798eafbeac1719a5bdd18fc64d73dc;hb=55508ede1cc74bae5129acae12e214de0bd0c4f1;hpb=5fba484d7844c3c48e854df28dbea4a6b40b4327

diff --git a/pms3003.pl b/pms3003.pl
index 1c5067b..7c0205e 100755
--- a/pms3003.pl
+++ b/pms3003.pl
@@ -3,12 +3,15 @@ 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 $port = shift @ARGV || '/dev/ttyUSB1';
+my $port = shift @ARGV || '/dev/ttyUSB0';
 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';
 
+my $debug = $ENV{DEBUG} || 0;
+
 my $s = new Device::SerialPort( $port ) || die $!;
 $s->baudrate(9600);
 $s->databits(8);
@@ -34,18 +37,29 @@ pm10_r
 while (1) {
 
 	my ($len, $string) = $s->read(24);
+	my $t = int( Time::HiRes::time() * 1_000_000_000 );
+	die $! if ! defined($len);
 	if ( $len > 0 ) {
 		my @v = unpack('n*', $string);
-		warn "# $len ",dump($string), dump( @v ), $/;
+		warn "# $len ",dump($string), dump( @v ), $/ if $debug;
 		my $header = shift @v; 
-		if ( $header == 0x424d ) {
+		my $checksum = pop @v;	  # remove checksum
+	
+		my $sum = 0;
+		foreach my $b ( unpack('C*', substr($string,0,-2) ) ) {
+			$sum += $b;
+		}
+		$sum = $sum & 0xffff;
+
+		if ( $header == 0x424d && $sum == $checksum ) {
 			shift @v; # skip len
-			pop @v;	  # remove checksum
+
 			my $influx = "pms3003,dc=trnjanska ";
 			foreach my $i ( 0 .. $#v ) {
 				$influx .= "$names[$i]=$v[$i],";
 			};
 			$influx =~ s/,$//;
+			$influx .= " $t";
 			print "$influx\n";
 			system "curl --silent -XPOST '$influx_url' --data-binary '$influx'"
 		}