don't send 0 values

diff --git a/zph02.pl b/zph02.pl
index 731a432..10f961e 100755 (executable)
--- a/zph02.pl
+++ b/zph02.pl
@@ -43,7 +43,7 @@ while (1) {
 
                my $checksum = $v[8];
                my $pcnt = $v[3] + ( $v[4] / 100 );
-               if ( $v[0] == 0xff && $sum == $checksum ) {
+               if ( $v[0] == 0xff && $sum == $checksum && $pcnt > 0) {
                        my $influx = "zph02,dc=trnjanska pm25_pcnt=$pcnt $t";
                        print "$influx\n" if -e '/dev/shm/air-debug';
                        system "curl --max-time 2 --silent -XPOST '$influx_url' --data-binary '$influx'";