X-Git-Url: http://dxcluster.net/gitweb/gitweb.cgi?a=blobdiff_plain;f=loop.pl;h=1a677d52360866d28f8e247bffbf1ca7dd406e21;hb=cbf57212d7962476d2f2e7bb966283ab4fc1e5ba;hp=8a33ba72ce797146e6b6c81e7c1de65c4c35687e;hpb=9a9679bb16f6676d568db58d46ac0bbe85da2a4c;p=dweather.git diff --git a/loop.pl b/loop.pl index 8a33ba7..1a677d5 100755 --- a/loop.pl +++ b/loop.pl @@ -3,22 +3,47 @@ use strict; use v5.10.1; +use Mojolicious::Lite; use Serial; use Mojo::IOLoop; use Mojo::IOLoop::Stream; -use Mojo::JSON qw(decode_json encode_json); +use Mojo::Transaction::WebSocket; +#use Mojo::JSON qw(decode_json encode_json); +use JSON; use Debug; use SMGLog; +use Math::Round qw(nearest); +use File::Copy; +use Data::Random qw(rand_chars); +use IO::File; + +use constant pi => 3.14159265358979; my $devname = "/dev/davis"; -my $rain_mult = 0.1; # 0.1 or 0.2 mm or 0.01 inches +my $datafn = ".loop_data"; +my $dataf; + +my $poll_interval = 2.5; +my $rain_mult = 0.2; # 0.1 or 0.2 mm or 0.01 inches my $tid; my $rid; -my $count; +our $did; +my $nlcount; my $state = "ready"; my $buf; my $dbg; -my $last_reading; +my $ser; # the serial port Mojo::IOLoop::Stream +my $last_min_h; +my $last_hour_h; + +our $json = JSON->new->canonical(1); +our $WS = {}; # websocket connections + +our $ld = {}; +our @last10minsr = (); +our @last5daysh = (); + +our $loop_count; # how many LOOPs we have done, used as start indicator our @crc_table = ( 0x0, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, @@ -65,40 +90,129 @@ $bar_trend{0} = "Steady"; $bar_trend{20} = "Rising Slowly"; $bar_trend{60} = "Rising Rapidly"; -#$SIG{TERM} = $SIG{INT} = sub {Mojo::IOLoop->stop if Mojo::IOLoop->is_running && !$DB::VERSION}; - -my $dlog = SMGLog->new("day"); -$dlog->mode('a'); +our $ending = 0; + +$SIG{TERM} = $SIG{INT} = sub {++$ending; Mojo::IOLoop->stop;}; +$SIG{HUP} = 'IGNORE'; + + +# WebSocket weather service +websocket '/weather' => sub { + my $c = shift; + my $msg = shift; + my $tx = $c->tx; + + # Opened + app->log->debug('WebSocket opened.'); + dbg 'WebSocket opened' if isdbg 'chan'; + $WS->{$tx} = $tx; + + # send historical data + $c->send($ld->{lasthour_h}) if exists $ld->{lasthour_h}; + $c->send($ld->{lastmin_h}) if exists $ld->{lastmin_h}; + + # disable timeout + $c->inactivity_timeout(3615); + + # Incoming message + $c->on( + message => sub { + my ($c, $msg) = @_; + dbg "websocket: text $msg" if isdbg 'chan'; + }, + json => sub { + my ($c, $msg) = @_; + dbg "websocket: json $msg" if isdbg 'chan'; + } + ); + + # Closed + $c->on(finish => sub { + my ($c, $code, $reason) = @_; + app->log->debug("WebSocket closed with status $code."); + dbg "websocket closed with status $code" if isdbg 'chan'; + delete $WS->{$tx}; + }); +}; + +get '/' => {template => 'index'}; + + +dbginit(); +if (@ARGV) { + dbgadd(@ARGV); +} +dbgadd('chan'); + +dbg '***'; +dbg "*** starting $0"; +dbg '***'; + +read_ld(); + +my $tnow = time; +my $dayno = int ($tnow/86400); +@last5daysh = grab_history(SMGLog->new("day"), "h", $tnow-(86400*5), $_) for ($dayno-4, $dayno-3, $dayno-2, $dayno-1, $dayno); +@last10minsr = map {my ($t, $js) = split(/\s/, $_, 2); $js} grab_history(SMGLog->new("debug"), "r", $tnow-(60*3), $dayno); + +our $dlog = SMGLog->new("day"); +dbg "before next tick"; +Mojo::IOLoop->next_tick(sub { loop() }); +dbg "before app start"; +app->start; +dbg "after app start"; + +write_ld(); +$dataf->close if $dataf; +undef $dataf; + + +# move all the files along one +cycle_loop_data_files(); + +dbg '***'; +dbg "*** ending $0"; +dbg '***'; -my $s = do_open($devname); -start_loop(); +exit 0; -Mojo::IOLoop->recurring(0.1 => sub { $dlog->flushall }); +################################################################################## + +sub loop +{ + dbg "last_min: " . scalar gmtime($ld->{last_min}); + dbg "last_hour: " . scalar gmtime($ld->{last_hour}); + + $did = Mojo::IOLoop->recurring(1 => sub {$dlog->flushall}); + + do_reopen($devname); +} -Mojo::IOLoop->start unless Mojo::IOLoop->is_running; -exit 0; sub on_read { - my ($str, $d) = @_; + my ($ser, $d) = @_; $buf .= $d; $d =~ s/([\%\x00-\x1f\x7f-\xff])/sprintf("%%%02X", ord($1))/eg; -# say "read added '$d' buf lth=" . length $buf if $dbg; + dbg "read added '$d' buf lth=" . length $buf if isdbg 'raw'; if ($state eq 'waitnl' && $buf =~ /[\cJ\cM]+/) { - Mojo::IOLoop->remove($tid); + dbg "Got \\n" if isdbg 'state'; + Mojo::IOLoop->remove($tid) if $tid; + undef $tid; undef $buf; - $s->write("LPS 1 1\n"); + $nlcount = 0; + $ser->write("LPS 1 1\n"); chgstate("waitloop"); } elsif ($state eq "waitloop") { if ($buf =~ /\x06/) { + dbg "Got ACK 0x06" if isdbg 'state'; chgstate('waitlooprec'); undef $buf; } } elsif ($state eq 'waitlooprec') { if (length $buf >= 99) { - say "got loop record\n" if $dbg; - + dbg "got loop record" if isdbg 'chan'; chgstate(''); process($buf); undef $buf; @@ -108,146 +222,322 @@ sub on_read sub start_loop { - say "writing \\n" if $dbg; - - $s->write("\n"); - $tid = Mojo::IOLoop->recurring(0.6 => sub {say "writing \\n" if $dbg; $s->write("\n")}); - + $nlcount = 1; + dbg "start_loop writing $nlcount \\n" if isdbg 'state'; + $ser->write("\n"); + Mojo::IOLoop->remove($tid) if $tid; + undef $tid; + $tid = Mojo::IOLoop->recurring(0.6 => sub { + if (++$nlcount > 10) { + dbg "\\n count > 10, closing connection" if isdbg 'chan'; + do_reopen($devname); + return; + } + dbg "writing $nlcount \\n" if isdbg 'state'; + $ser->write("\n"); + }); chgstate("waitnl"); } sub chgstate { - say "state '$state' -> '$_[0]'" if $dbg; - + dbg "state '$state' -> '$_[0]'" if isdbg 'state'; $state = $_[0]; } +sub do_reopen +{ + my $name = shift; + dbg "do reopen on '$name' ending $ending"; + unless ($ending) { + $ser = do_open($name); + start_loop(); + chgstate(''); + $nlcount = 0; + Mojo::IOLoop->start unless Mojo::IOLoop->is_running; + } +} + sub do_open { my $name = shift; + + $ser->close if $ser; + undef $ser; + my $ob = Serial->new($name, 19200) || die "$name $!\n"; - say "streaming $name fileno(", fileno($ob), ")" if $dbg; - - my $str = Mojo::IOLoop::Stream->new($ob); - $str->on(error=>sub {say "serial $_[1]"; undef $s; Mojo::IOLoop->reset;}); + dbg "streaming $name fileno(" . fileno($ob) . ")" if isdbg 'chan'; - $str->on(close=>sub {say "serial closing"; undef $s; Mojo::IOLoop->reset;}); - $str->on(timeout=>sub {say "serial timeout";}); - $str->on(read=>sub {on_read(@_)}); - $str->start; - - $rid = Mojo::IOLoop->recurring(2.5 => sub { - start_loop() if !$state || $state eq "waitnl"; + my $ser = Mojo::IOLoop::Stream->new($ob); + $ser->on(error=>sub {dbg "serial $_[1]"; do_reopen($name) unless $ending}); + $ser->on(close=>sub {dbg "serial closing"; do_reopen($name) unless $ending}); + $ser->on(timeout=>sub {dbg "serial timeout";}); + $ser->on(read=>sub {on_read(@_)}); + $ser->start; + + Mojo::IOLoop->remove($tid) if $tid; + undef $tid; + Mojo::IOLoop->remove($rid) if $rid; + undef $rid; + $rid = Mojo::IOLoop->recurring($poll_interval => sub { + start_loop() if !$state; }); - - return $str; + chgstate(''); + $nlcount = 0; + + return $ser; } -my $last_time; +my @min; +my @hour; sub process { my $blk = shift; my $loo = substr $blk,0,3; unless ( $loo eq 'LOO') { - say "Block invalid loo -> $loo" if $dbg; return; + dbg "Block invalid loo -> $loo" if isdbg 'chan'; return; } - my $t; + my $tmp; + my $temp; + my $rain; my %h; - # Common ones - $h{Pressure_Trend} = unpack("C", substr $blk,3,1); - $h{Pressure_Trend_txt} = $bar_trend{$h{'Pressure_Trend'}}; - $t = unpack("s", substr $blk,7,2) / 1000; - $h{Pressure} = sprintf("%.0f",in2mb($t))+0; + my $crc_calc = CRC_CCITT($blk); - $t = unpack("s", substr $blk,9,2) / 10; - $h{Temp_In} = sprintf("%.1f", f2c($t))+0; - - $t = unpack("s", substr $blk,12,2) / 10; - $h{Temp_Out} = sprintf("%.1f", f2c($t))+0; + if ($crc_calc==0) { - $t = unpack("C", substr $blk,14,1); - $h{Wind} = sprintf("%.1f",mph2mps($t))+0; - $h{Dir} = unpack("s", substr $blk,16,2)+0; + # Common ones + $tmp = unpack("s", substr $blk,7,2) / 1000; + $h{Pressure} = nearest(1, in2mb($tmp)); + $tmp = unpack("s", substr $blk,9,2) / 10; + $h{Temp_In} = nearest(0.1, f2c($tmp)); - $h{'Humidity_Out'} = unpack("C", substr $blk,33,1)+0; - $h{'Humidity_In'} = unpack("C", substr $blk,11,1)+0; + $temp = nearest(0.1, f2c(unpack("s", substr $blk,12,2) / 10)); + $h{Temp_Out} = $temp; + if ($temp > 75 || $temp < -75) { + dbg "LOOP Temperature out of range ($temp), record ignored"; + return; + } - $t = unpack("C", substr $blk,43,1)+0; - $h{'UV'} = $t unless $t >= 255; - $t = unpack("s", substr $blk,44,2)+0; # watt/m**2 - $h{'Solar'} = $t unless $t >= 32767; + $tmp = unpack("C", substr $blk,14,1); + $h{Wind} = nearest(0.1, mph2mps($tmp)); + $h{Dir} = unpack("s", substr $blk,16,2)+0; - $h{'Rain_Rate'} = sprintf("%0.1f",unpack("s", substr $blk,41,2) * $rain_mult)+0; - $h{'Rain_Day'} = sprintf("%0.1f", unpack("s", substr $blk,50,2) * $rain_mult)+0; + my $wind = {w => $h{Wind}, d => $h{Dir}}; + $wind = 0 if $wind == 255; + push @{$ld->{wind_min}}, $wind; - # what sort of packet is it? + $tmp = int(unpack("C", substr $blk,33,1)+0); + if ($tmp > 100) { + dbg "LOOP Outside Humidity out of range ($tmp), record ignored"; + return; + } + $h{Humidity_Out} = $tmp; + $tmp = int(unpack("C", substr $blk,11,1)+0); + if ($tmp > 100) { + dbg "LOOP Inside Humidity out of range ($tmp), record ignored"; + return; + } + $h{Humidity_In} = $tmp; + - $t = unpack("C", substr $blk,4,1); - if ($t) { + $tmp = unpack("C", substr $blk,43,1)+0; + $h{UV} = $tmp unless $tmp >= 255; + $tmp = unpack("s", substr $blk,44,2)+0; # watt/m**2 + $h{Solar} = $tmp unless $tmp >= 32767; + + # $h{Rain_Rate} = nearest(0.1,unpack("s", substr $blk,41,2) * $rain_mult); + $rain = $h{Rain_Day} = nearest(0.1, unpack("s", substr $blk,50,2) * $rain_mult); + my $delta_rain = $h{Rain} = nearest(0.1, ($rain >= $ld->{last_rain} ? $rain - $ld->{last_rain} : $rain)) if $loop_count; + $ld->{last_rain} = $rain; + + # what sort of packet is it? + my $sort = unpack("C", substr $blk,4,1); + if ($sort) { + + # Newer LOOP2 packet + $tmp = unpack("C", substr $blk,18,2); + # $h{Wind_Avg_10} = nearest(0.1,mph2mps($tmp/10)); + $tmp = unpack("C", substr $blk,20,2); + # $h{Wind_Avg_2} = nearest(0.1,mph2mps($tmp/10)); + $tmp = unpack("C", substr $blk,22,2); + # $h{Wind_Gust_10} = nearest(0.1,mph2mps($tmp/10)); + + # $h{Dir_Avg_10} = unpack("C", substr $blk,24,2)+0; + $tmp = unpack("C", substr $blk,30,2); + $h{Dew_Point} = nearest(0.1, f2c($tmp)); + + } else { + + # Older LOOP packet + $tmp = unpack("C", substr $blk,15,1); + # $h{Wind_Avg_10} = nearest(0.1,mph2mps($tmp)); + $h{Dew_Point} = nearest(0.1, dew_point($h{Temp_Out}, $h{Humidity_Out})); + $h{Rain_Month} = nearest(0.1, unpack("s", substr $blk,52,2) * $rain_mult); + $h{Rain_Year} = nearest(0.1, unpack("s", substr $blk,54,2) * $rain_mult); + } - # Newer LOOP2 packet - $t = unpack("C", substr $blk,18,2); - $h{Wind_Avg_10} = sprintf("%.1f",mph2mps($t/10))+0; - $t = unpack("C", substr $blk,20,2); - $h{Wind_Avg_2} = sprintf("%.1f",mph2mps($t/10))+0; - $t = unpack("C", substr $blk,22,2); - $h{Wind_Gust_10} = sprintf("%.1f",mph2mps($t/10))+0; - - $h{Dir_Avg_10} = unpack("C", substr $blk,24,2)+0; - $t = unpack("C", substr $blk,30,2); - $h{Dew_Point} = sprintf("%0.1f", f2c($t))+0; + my $ts = time; + my $s; + my $dayno = int($ts/86400); + if ($dayno > $ld->{last_day}) { + $ld->{Temp_Out_Max} = $ld->{Temp_Out_Min} = $temp; + $ld->{Temp_Out_Max_T} = $ld->{Temp_Out_Min_T} = clocktime($ts, 0); + $ld->{last_day} = $dayno; + write_ld(); + cycle_loop_data_files(); + } + if ($temp > $ld->{Temp_Out_Max}) { + $ld->{Temp_Out_Max} = $temp; + $ld->{Temp_Out_Max_T} = clocktime($ts, 0); + write_ld(); + } + if ($temp < $ld->{Temp_Out_Min}) { + $ld->{Temp_Out_Min} = $temp; + $ld->{Temp_Out_Min_T} = clocktime($ts, 0); + write_ld(); + } - } else { - - # Older LOOP packet - $t = unpack("C", substr $blk,15,1); - $h{Wind_Avg_10} = sprintf("%.1f",mph2mps($t))+0; - $h{'Dew_Point'} = sprintf("%0.1f", dew_point($h{Temp_Out}, $h{'Humidity_Out'}))+0; + if ($ts >= $ld->{last_hour} + 1800) { + $h{Pressure_Trend} = unpack("C", substr $blk,3,1); + $h{Pressure_Trend_txt} = $bar_trend{$h{Pressure_Trend}}; + $h{Batt_TX_OK} = (unpack("C", substr $blk,86,1)+0) ^ 1; + $h{Batt_Console} = nearest(0.01, unpack("s", substr $blk,87,2) * 0.005859375); + $h{Forecast_Icon} = unpack("C", substr $blk,89,1); + $h{Forecast_Rule} = unpack("C", substr $blk,90,1); + $h{Sunrise} = sprintf( "%04d", unpack("S", substr $blk,91,2) ); + $h{Sunrise} =~ s/(\d{2})(\d{2})/$1:$2/; + $h{Sunset} = sprintf( "%04d", unpack("S", substr $blk,93,2) ); + $h{Sunset} =~ s/(\d{2})(\d{2})/$1:$2/; + $h{Temp_Out_Max} = $ld->{Temp_Out_Max}; + $h{Temp_Out_Min} = $ld->{Temp_Out_Min}; + $h{Temp_Out_Max_T} = $ld->{Temp_Out_Max_T}; + $h{Temp_Out_Min_T} = $ld->{Temp_Out_Min_T}; + - $h{'Rain_Month'} = sprintf("%0.1f", unpack("s", substr $blk,52,2) * $rain_mult)+0; - $h{'Rain_Year'} = sprintf("%0.1f", unpack("s", substr $blk,54,2) * $rain_mult)+0; + if ($loop_count) { # i.e not the first + my $a = wind_average(scalar @{$ld->{wind_hour}} ? @{$ld->{wind_hour}} : {w => $h{Wind}, d => $h{Dir}}); + $h{Wind_1h} = nearest(0.1, $a->{w}); + $h{Dir_1h} = nearest(0.1, $a->{d}); - $h{'Batt_TX_OK'} = (unpack("C", substr $blk,86,1)+0) ^ 1; - $h{'Batt_Console'} = sprintf("%0.2f", unpack("s", substr $blk,87,2) * 0.005859375)+0; - $h{'Forecast_Icon'} = unpack("C", substr $blk,89,1); - $h{'Forecast_Rule'} = unpack("C", substr $blk,90,1); - - $h{'Sunrise'} = sprintf( "%04d", unpack("S", substr $blk,91,2) ); - $h{'Sunrise'} =~ s/(\d{2})(\d{2})/$1:$2/; - $h{'Sunset'} = sprintf( "%04d", unpack("S", substr $blk,93,2) ); - $h{'Sunset'} =~ s/(\d{2})(\d{2})/$1:$2/; - } + $a = wind_average(@{$ld->{wind_min}}); + $h{Wind_1m} = nearest(0.1, $a->{w}); + $h{Dir_1m} = nearest(1, $a->{d}); - my $crc = unpack "%n", substr($blk,97,2); - my $crc_calc = CRC_CCITT($blk); + ($h{Rain_1m}, $h{Rain_1h}, $h{Rain_24h}) = calc_rain($rain); + } + $ld->{last_rain_min} = $ld->{last_rain_hour} = $rain; - if ($crc_calc==0) { - my $o = gen_hash_diff($last_reading, \%h); - $last_reading = \%h; - my $t = time; - my $j; - my $s; - if ($t >= $last_time + 60) { - $j = encode_json(\%h); - $s = qq|{"t":$t,"m":$j}|; - $last_time = $t; - } elsif ($o) { - $j = encode_json($o); - $s = qq|{"t":$t,"r":$j}|; - } - if ($s) { - say $s; - $dlog->writenow($s); + $last_hour_h = {%h}; + $s = genstr($ts, 'h', \%h); + $ld->{lasthour_h} = $s; + + $ld->{last_hour} = int($ts/1800)*1800; + $ld->{last_min} = int($ts/60)*60; + @{$ld->{wind_hour}} = (); + @{$ld->{wind_min}} = (); + + if ($s) { + output_str($s, 1); + push @last5daysh, $s; + shift @last5daysh if @last5daysh > 5*24; + } + write_ld(); + + } elsif ($ts >= $ld->{last_min} + 60) { + my $a = wind_average(@{$ld->{wind_min}}); + my %save; + + push @{$ld->{wind_hour}}, $a; + + if ($loop_count) { # i.e not the first + my $rm; + + $h{Wind_1m} = nearest(0.1, $a->{w}); + $h{Dir_1m} = nearest(1, $a->{d}); + ($h{Rain_1m}, $h{Rain_1h}, $h{Rain_24h}) = calc_rain($rain); + } + $ld->{last_rain_min} = $rain; + + $h{Temp_Out_Max} = $ld->{Temp_Out_Max}; + $h{Temp_Out_Min} = $ld->{Temp_Out_Min}; + $h{Temp_Out_Max_T} = $ld->{Temp_Out_Max_T}; + $h{Temp_Out_Min_T} = $ld->{Temp_Out_Min_T}; + + $last_min_h = {%h}; + $s = genstr($ts, 'm', \%h); + $ld->{lastmin_h} = $s; + + $ld->{last_min} = int($ts/60)*60; + @{$ld->{wind_min}} = (); + + output_str($s, 1) if $s; + write_ld(); + + } else { + my $o = gen_hash_diff($ld->{last_h}, \%h); + if ($o) { + $s = genstr($ts, 'r', $o); + push @last10minsr, $s; + shift @last10minsr if @last10minsr > 240; + } + else { + dbg "loop rec not changed" if isdbg 'chan'; + } + output_str($s, 0) if $s; } + $ld->{last_h} = \%h; + ++$loop_count; } else { - say "CRC check failed for LOOP data!"; - return 1; + dbg "CRC check failed for LOOP data!"; + } + return; +} + +sub genstr +{ + my $ts = shift; + my $let = shift; + my $h = shift; + + my $j = $json->encode($h); + my $tm = clocktime($ts, 1); + return qq|{"tm":"$tm","t":$ts,"$let":$j}|; +} + +sub clocktime +{ + my $ts = shift; + my $secsreq = shift; + my ($sec,$min,$hr) = (gmtime $ts)[0,1,2]; + my $s; + if ($secsreq) { + $s = sprintf "%02d:%02d:%02d", $hr, $min, $sec; + } else { + $s = sprintf "%02d:%02d", $hr, $min; + } + return $s; +} + +sub output_str +{ + my $s = shift; + my $logit = shift; + + dbg $s; +# say $s; + $dlog->writenow($s) if $logit; + foreach my $ws (keys $WS) { + my $tx = $WS->{$ws}; + if ($tx) { + $tx->send($s); + } else { + delete $WS->{$tx}; + } } } @@ -259,7 +549,7 @@ sub gen_hash_diff my $count; while (my ($k, $v) = each %$now) { - if ($last->{$k} ne $now->{$k}) { + if (!exists $last->{$k} || $last->{$k} ne $now->{$k}) { $o{$k} = $v; ++$count; } @@ -325,3 +615,130 @@ sub in2mb { return $_[0] * 33.8637526; } + +sub wind_average +{ + my ($sindir, $cosdir, $wind); + my $count; + + foreach my $r (@_) { + $wind += $r->{w}; + $sindir += sin(d2r($r->{d})) * $r->{w}; + $cosdir += cos(d2r($r->{d})) * $r->{w}; + ++$count; + } + + my $avhdg = r2d(atan2($sindir, $cosdir)); + $avhdg += 360 if $avhdg < 0; + return {w => nearest(0.1,$wind / $count), d => nearest(0.1,$avhdg)}; +} + +# radians to degrees +sub r2d +{ + my $n = shift; + return ($n / pi) * 180; +} + +# degrees to radians +sub d2r +{ + my $n = shift; + return ($n / 180) * pi; +} + +sub calc_rain +{ + my $rain = shift; + + $ld->{rain24} ||= []; + + my $Rain_1h = nearest(0.1, $rain >= $ld->{last_rain_hour} ? $rain - $ld->{last_rain_hour} : $rain); # this is the rate for this hour, so far + my $rm = nearest(0.1, $rain >= $ld->{last_rain_min} ? $rain - $ld->{last_rain_min} : $rain); + my $Rain_1m = nearest(0.1, $rm); + push @{$ld->{rain24}}, $Rain_1m; + $ld->{rain_24} += $rm; + while (@{$ld->{rain24}} > 24*60) { + $ld->{rain_24} -= shift @{$ld->{rain24}}; + } + my $Rain_24h = nearest(0.1, $ld->{rain_24}); + return ($Rain_1m, $Rain_1h, $Rain_24h); +} + +sub read_ld +{ + unless ($dataf) { + $dataf = IO::File->new("+>> $datafn") or die "cannot open $datafn $!"; + $dataf->autoflush(1); + } + + seek $dataf, 0, 0; + my $s = <$dataf>; + chomp $s; + dbg "read loop data: $s" if isdbg 'json'; + $ld = $json->decode($s) if length $s; + + # sort out rain stats + my $c; + if ($ld->{rain24} && ($c = @{$ld->{rain24}}) < 24*60) { + my $diff = 24*60 - $c; + unshift @{$ld->{rain24}}, 0 for 0 .. $diff; + } + my $rain; + + if ($ld->{rain24}) { + $rain += $_ for @{$ld->{rain24}}; + } + + $ld->{rain_24} = nearest(0.1, $rain); + delete $ld->{hour}; + delete $ld->{min}; +} + +sub write_ld +{ + unless ($dataf) { + $dataf = IO::File->new("+>> $datafn") or die "cannot open $datafn $!"; + $dataf->autoflush(1); + } + + seek $dataf, 0, 0; + truncate $dataf, 0; + $ld->{ts} = time; + my $s = $json->encode($ld); + dbg "write loop data: $s" if isdbg 'json'; + print $dataf "$s\n"; +} + +sub cycle_loop_data_files +{ + $dataf->close if $dataf; + undef $dataf; + + rename "$datafn.oooo", "$datafn.ooooo"; + rename "$datafn.ooo", "$datafn.oooo"; + rename "$datafn.oo", "$datafn.ooo"; + rename "$datafn.o", "$datafn.oo"; + copy $datafn, "$datafn.o"; +} + +sub grab_history +{ + my $lg = shift; + my $let = shift; + my $start = shift || time - 86400; + my $dayno = shift; + my @out; + + if ($lg->open($dayno, 'r+')) { + while (my $l = $lg->read) { + next unless $l =~ /,"$let":/; + my ($t) = $l =~ /"t":(\d+)/; + if ($t && $t >= $start) { + push @out, $l; + } + } + $lg->close; + } + return @out; +}