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/ttyUSB1';
10 $port = '/dev/serial/by-path/pci-0000:00:1a.7-usb-0:5.4:1.0-port0';
11 my $influx_url = shift @ARGV || 'http://10.13.37.229:8186/write?db=telegraf';
12 $influx_url = 'http://10.13.37.92:8086/write?db=rot13';
14 my $s = new Device::SerialPort( $port ) || die $!;
19 $s->handshake('none');
20 $s->read_char_time(5);
21 $s->read_const_time(10);
26 my ($len, $string) = $s->read(9);
27 my $t = int( Time::HiRes::time() * 1_000_000_000 );
28 die $! if ! defined($len);
30 my @v = unpack('C*', $string);
31 #warn "# $len ",dump($string), dump( @v ), $/;
34 # -2 is specified in datasheet, next byte is 0 so it's same as -1
35 foreach my $i ( 0 .. $#v - 2 ) {
42 my $pcnt = $v[3] + ( $v[4] / 100 );
43 if ( $v[0] == 0xff && $sum == $checksum ) {
44 my $influx = "zph02,dc=trnjanska pm25_pcnt=$pcnt $t";
46 system "curl --silent -XPOST '$influx_url' --data-binary '$influx'"