4 # sudo apt install libdevice-serialport-perl libdata-dump-perl
5 use Device::SerialPort;
7 use Data::Dump qw(dump);
9 my $port = shift @ARGV || '/dev/ttyUSB0';
10 my $influx_url = shift @ARGV || 'http://10.13.37.229:8186/write?db=telegraf';
11 $influx_url = 'http://10.13.37.92:8086/write?db=rot13';
13 my $s = new Device::SerialPort( $port ) || die $!;
18 $s->handshake('none');
19 $s->read_char_time(0);
20 $s->read_const_time(10);
23 $s->write("\xFF\x01\x86\x00\x00\x00\x00\x00\x79");
27 my ($len, $string) = $s->read(9);
28 my $t = int( Time::HiRes::time() * 1_000_000_000 );
29 die $! if ! defined($len);
31 my @v = unpack('C*', $string);
32 #warn "# $len ",dump($string), dump( @v ), $/;
35 foreach my $i ( 1 .. $#v - 1 ) {
39 $sum = 0xff - $sum + 1;
42 my $co2 = $v[2] * 255 + $v[3];
43 if ( $v[0] == 0xff && $sum == $checksum ) {
44 my $influx = "mh-z19b,dc=trnjanska co2=$co2 $t";
46 system "curl --silent -XPOST '$influx_url' --data-binary '$influx'"
49 $s->write("\xFF\x01\x86\x00\x00\x00\x00\x00\x79");