pihdmi serial port

[air-quality] / mh-z19b.pl

diff --git a/mh-z19b.pl b/mh-z19b.pl
index b71b365..1d7b894 100755 (executable)
--- a/mh-z19b.pl
+++ b/mh-z19b.pl
@@ -6,9 +6,8 @@ use Device::SerialPort;
 use Time::HiRes;
 use Data::Dump qw(dump);
 
-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 $port = shift @ARGV || '/dev/serial/by-path/platform-3f980000.usb-usb-0:1.5:1.2';
+my $influx_url = shift @ARGV || 'http://10.13.37.92:8086/write?consistency=any&db=rot13';
 
 my $s = new Device::SerialPort( $port ) || die $!;
 $s->baudrate(9600);
@@ -16,7 +15,7 @@ $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 +28,9 @@ 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 ) {
@@ -38,12 +39,15 @@ 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 $t";
                        print "$influx\n";
-                       system "curl --silent -XPOST '$influx_url' --data-binary '$influx'"
+                       system "curl --silent -XPOST '$influx_url' --data-binary '$influx'";
+                       system "mosquitto_pub -h rpi2 -t 'air/mh-z19b/co2' -m $co2";
+               } else {
+                       die "checksum error";
                }
                sleep 1;
                $s->write("\xFF\x01\x86\x00\x00\x00\x00\x00\x79");