loop.pl

   1 #!/usr/bin/perl
   2 use strict;
   3
   4 use v5.10.1;
   5
   6 use Mojolicious::Lite;
   7 use Serial;
   8 use Mojo::IOLoop;
   9 use Mojo::IOLoop::Stream;
  10 use Mojo::Transaction::WebSocket;
  11 #use Mojo::JSON  qw(decode_json encode_json);
  12 use JSON;
  13 use Debug;
  14 use SMGLog;
  15 use Math::Round qw(nearest);
  16 use File::Copy;
  17 use Data::Random qw(rand_chars);
  18
  19 use constant pi => 3.14159265358979;
  20
  21 my $devname = "/dev/davis";
  22 my $datafn = ".loop_data";
  23 my $dataf;
  24
  25 my $poll_interval = 2.5;
  26 my $rain_mult = 0.2;                            # 0.1 or 0.2 mm or 0.01 inches
  27 my $tid;
  28 my $rid;
  29 our $did;
  30 my $nlcount;
  31 my $state = "ready";
  32 my $buf;
  33 my $dbg;
  34 my $ser;                                                        # the serial port Mojo::IOLoop::Stream
  35 my $last_min_h;
  36 my $last_hour_h;
  37
  38 our $json = JSON->new->canonical(1);
  39 our $WS = {};                                   # websocket connections
  40
  41 our $ld = {};
  42
  43 our $loop_count;                                # how many LOOPs we have done, used as start indicator
  44
  45 our     @crc_table = (
  46                                   0x0, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
  47                                   0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
  48                                   0x1231, 0x210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
  49                                   0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
  50                                   0x2462, 0x3443, 0x420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
  51                                   0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
  52                                   0x3653, 0x2672, 0x1611, 0x630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
  53                                   0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
  54                                   0x48c4, 0x58e5, 0x6886, 0x78a7, 0x840, 0x1861, 0x2802, 0x3823,
  55                                   0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
  56                                   0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0xa50, 0x3a33, 0x2a12,
  57                                   0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
  58                                   0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0xc60, 0x1c41,
  59                                   0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
  60                                   0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0xe70,
  61                                   0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
  62                                   0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
  63                                   0x1080, 0xa1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
  64                                   0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
  65                                   0x2b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
  66                                   0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
  67                                   0x34e2, 0x24c3, 0x14a0, 0x481, 0x7466, 0x6447, 0x5424, 0x4405,
  68                                   0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
  69                                   0x26d3, 0x36f2, 0x691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
  70                                   0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
  71                                   0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x8e1, 0x3882, 0x28a3,
  72                                   0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
  73                                   0x4a75, 0x5a54, 0x6a37, 0x7a16, 0xaf1, 0x1ad0, 0x2ab3, 0x3a92,
  74                                   0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
  75                                   0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0xcc1,
  76                                   0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
  77                                   0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0xed1, 0x1ef0
  78                                  );
  79
  80 our %bar_trend;
  81
  82 $bar_trend{-60} = "Falling Rapidly";
  83 $bar_trend{196} = "Falling Rapidly";
  84 $bar_trend{-20} = "Falling Slowly";
  85 $bar_trend{236} = "Falling Slowly";
  86 $bar_trend{0} = "Steady";
  87 $bar_trend{20} = "Rising Slowly";
  88 $bar_trend{60} = "Rising Rapidly";
  89
  90 our $ending = 0;
  91
  92 $SIG{TERM} = $SIG{INT} = sub {++$ending; Mojo::IOLoop->stop;};
  93 $SIG{HUP} = 'IGNORE';
  94
  95
  96 # WebSocket weather service
  97 websocket '/weather' => sub {
  98   my $c = shift;
  99   my $msg = shift;
 100   my $tx = $c->tx;
 101
 102   # Opened
 103   app->log->debug('WebSocket opened.');
 104   dbg 'WebSocket opened' if isdbg 'chan';
 105   $WS->{$tx} = $tx;
 106
 107   # send historical data
 108   $c->send($ld->{lasthour_h}) if exists $ld->{lasthour_h};
 109   $c->send($ld->{lastmin_h}) if exists $ld->{lastmin_h};
 110
 111   # disable timeout
 112   $c->inactivity_timeout(3615);
 113
 114   # Incoming message
 115   $c->on(
 116                  message => sub {
 117                          my ($c, $msg) = @_;
 118                          dbg "websocket: text $msg" if isdbg 'chan';
 119                  },
 120                  json => sub {
 121                          my ($c, $msg) = @_;
 122                          dbg "websocket: json $msg" if isdbg 'chan';
 123                  }
 124   );
 125
 126   # Closed
 127   $c->on(finish => sub {
 128     my ($c, $code, $reason) = @_;
 129     app->log->debug("WebSocket closed with status $code.");
 130         dbg 'webwocket closed with status $code' if isdbg 'chan';
 131         delete $WS->{$tx};
 132   });
 133 };
 134
 135 get '/' => {template => 'index'};
 136
 137
 138 dbginit();
 139 if (@ARGV) {
 140         dbgadd(@ARGV);
 141 }
 142 dbgadd('chan');
 143
 144 dbg '***';
 145 dbg "*** starting $0";
 146 dbg '***';
 147
 148 our $dlog = SMGLog->new("day");
 149 dbg "before next tick";
 150 Mojo::IOLoop->next_tick(sub { loop() });
 151 dbg "before app start";
 152 app->start;
 153 dbg "after app start";
 154
 155 write_ld();
 156 close $dataf if $dataf;
 157
 158 # move all the files along one
 159 cycle_loop_data_files();
 160
 161 dbg '***';
 162 dbg "*** ending $0";
 163 dbg '***';
 164
 165 exit 0;
 166
 167 ##################################################################################
 168
 169 sub loop
 170 {
 171         read_ld();
 172
 173         dbg "last_min: " . scalar gmtime($ld->{last_min});
 174         dbg "last_hour: " . scalar gmtime($ld->{last_hour});
 175
 176         $did = Mojo::IOLoop->recurring(1 => sub {$dlog->flushall});
 177
 178         do_reopen($devname);
 179 }
 180
 181
 182
 183 sub on_read
 184 {
 185         my ($ser, $d) = @_;
 186         $buf .= $d;
 187         $d =~ s/([\%\x00-\x1f\x7f-\xff])/sprintf("%%%02X", ord($1))/eg;
 188         dbg "read added '$d' buf lth=" . length $buf if isdbg 'raw';
 189         if ($state eq 'waitnl' && $buf =~ /[\cJ\cM]+/) {
 190                 dbg "Got \\n" if isdbg 'state';
 191                 Mojo::IOLoop->remove($tid) if $tid;
 192                 undef $tid;
 193                 undef $buf;
 194                 $nlcount = 0;
 195                 $ser->write("LPS 1 1\n");
 196                 chgstate("waitloop");
 197         } elsif ($state eq "waitloop") {
 198                 if ($buf =~ /\x06/) {
 199                         dbg "Got ACK 0x06" if isdbg 'state';
 200                         chgstate('waitlooprec');
 201                         undef $buf;
 202                 }
 203         } elsif ($state eq 'waitlooprec') {
 204                 if (length $buf >= 99) {
 205                         dbg "got loop record" if isdbg 'chan';
 206                         chgstate('');
 207                         process($buf);
 208                         undef $buf;
 209                 }
 210         }
 211 }
 212
 213 sub start_loop
 214 {
 215         $nlcount = 1;
 216         dbg "start_loop writing $nlcount \\n" if isdbg 'state';
 217         $ser->write("\n");
 218         Mojo::IOLoop->remove($tid) if $tid;
 219         undef $tid;
 220         $tid = Mojo::IOLoop->recurring(0.6 => sub {
 221                                                                            if (++$nlcount > 10) {
 222                                                                                    dbg "\\n count > 10, closing connection" if isdbg 'chan';
 223                                                                                    do_reopen($devname);
 224                                                                                    return;
 225                                                                            }
 226                                                                            dbg "writing $nlcount \\n" if isdbg 'state';
 227                                                                            $ser->write("\n");
 228                                                                    });
 229         chgstate("waitnl");
 230 }
 231
 232 sub chgstate
 233 {
 234         dbg "state '$state' -> '$_[0]'" if isdbg 'state';
 235         $state = $_[0];
 236 }
 237
 238 sub do_reopen
 239 {
 240         my $name = shift;
 241         dbg "do reopen on '$name' ending $ending";
 242         unless ($ending) {
 243                 $ser = do_open($name);
 244                 start_loop();
 245                 chgstate('');
 246                 $nlcount = 0;
 247                 Mojo::IOLoop->start unless Mojo::IOLoop->is_running;
 248         }
 249 }
 250
 251 sub do_open
 252 {
 253         my $name = shift;
 254
 255         $ser->close if $ser;
 256         undef $ser;
 257
 258         my $ob = Serial->new($name, 19200) || die "$name $!\n";
 259         dbg "streaming $name fileno(" . fileno($ob) . ")" if isdbg 'chan';
 260
 261         my $ser = Mojo::IOLoop::Stream->new($ob);
 262         $ser->on(error=>sub {dbg "serial $_[1]"; do_reopen($name) unless $ending});
 263         $ser->on(close=>sub {dbg "serial closing"; do_reopen($name) unless $ending});
 264         $ser->on(timeout=>sub {dbg "serial timeout";});
 265         $ser->on(read=>sub {on_read(@_)});
 266         $ser->start;
 267
 268         Mojo::IOLoop->remove($tid) if $tid;
 269         undef $tid;
 270         Mojo::IOLoop->remove($rid) if $rid;
 271         undef $rid;
 272         $rid = Mojo::IOLoop->recurring($poll_interval => sub {
 273                                                                            start_loop() if !$state;
 274                                                                    });
 275         chgstate('');
 276         $nlcount = 0;
 277
 278         return $ser;
 279 }
 280
 281 my @min;
 282 my @hour;
 283
 284 sub process
 285 {
 286         my $blk = shift;
 287         my $loo =  substr $blk,0,3;
 288         unless ( $loo eq 'LOO') {
 289                 dbg "Block invalid loo -> $loo" if isdbg 'chan'; return;
 290         }
 291
 292         my $tmp;
 293         my $temp;
 294         my $rain;
 295         my %h;
 296
 297         my $crc_calc = CRC_CCITT($blk);
 298
 299         if ($crc_calc==0) {
 300
 301                 # Common ones
 302                 $tmp = unpack("s", substr $blk,7,2) / 1000;
 303                 $h{Pressure} = nearest(1, in2mb($tmp));
 304
 305                 $tmp = unpack("s", substr $blk,9,2) / 10;
 306                 $h{Temp_In} = nearest(0.1, f2c($tmp));
 307
 308                 $temp  = nearest(0.1, f2c(unpack("s", substr $blk,12,2) / 10));
 309                 $h{Temp_Out}  = $temp;
 310                 if ($temp > 75 || $temp < -75) {
 311                         dbg "LOOP Temperature out of range ($temp), record ignored";
 312                         return;
 313                 }
 314
 315                 $tmp = unpack("C", substr $blk,14,1);
 316                 $h{Wind} = nearest(0.1, mph2mps($tmp));
 317                 $h{Dir}     = unpack("s", substr $blk,16,2)+0;
 318
 319                 my $wind = {w => $h{Wind}, d => $h{Dir}};
 320                 $wind = 0 if $wind == 255;
 321                 push @{$ld->{wind_min}}, $wind;
 322
 323                 $tmp = int(unpack("C", substr $blk,33,1)+0);
 324                 if ($tmp > 100) {
 325                         dbg "LOOP Outside Humidity out of range ($tmp), record ignored";
 326                         return;
 327                 }
 328                 $h{Humidity_Out} = $tmp;
 329                 $tmp = int(unpack("C", substr $blk,11,1)+0);
 330                 if ($tmp > 100) {
 331                         dbg "LOOP Inside Humidity out of range ($tmp), record ignored";
 332                         return;
 333                 }
 334                 $h{Humidity_In}  = $tmp;
 335
 336
 337                 $tmp = unpack("C", substr $blk,43,1)+0;
 338                 $h{UV} = $tmp unless $tmp >= 255;
 339                 $tmp = unpack("s", substr $blk,44,2)+0; # watt/m**2
 340                 $h{Solar} = $tmp unless $tmp >= 32767;
 341
 342                 #       $h{Rain_Rate}  = nearest(0.1,unpack("s", substr $blk,41,2) * $rain_mult);
 343                 $rain = $h{Rain_Day}   = nearest(0.1, unpack("s", substr $blk,50,2) * $rain_mult);
 344                 my $delta_rain = $h{Rain} = nearest(0.1, ($rain >= $ld->{last_rain} ? $rain - $ld->{last_rain} : $rain)) if $loop_count;
 345                 $ld->{last_rain} = $rain;
 346
 347                 # what sort of packet is it?
 348                 my $sort =  unpack("C", substr $blk,4,1);
 349                 if ($sort) {
 350
 351                         # Newer LOOP2 packet
 352                         $tmp = unpack("C", substr $blk,18,2);
 353                         #               $h{Wind_Avg_10} = nearest(0.1,mph2mps($tmp/10));
 354                         $tmp = unpack("C", substr $blk,20,2);
 355                         #               $h{Wind_Avg_2} = nearest(0.1,mph2mps($tmp/10));
 356                         $tmp = unpack("C", substr $blk,22,2);
 357                         #               $h{Wind_Gust_10} = nearest(0.1,mph2mps($tmp/10));
 358
 359                         #               $h{Dir_Avg_10} = unpack("C", substr $blk,24,2)+0;
 360                         $tmp = unpack("C", substr $blk,30,2);
 361                         $h{Dew_Point} = nearest(0.1, f2c($tmp));
 362
 363                 } else {
 364
 365                         # Older LOOP packet
 366                         $tmp = unpack("C", substr $blk,15,1);
 367                         #               $h{Wind_Avg_10} = nearest(0.1,mph2mps($tmp));
 368                         $h{Dew_Point}  = nearest(0.1, dew_point($h{Temp_Out}, $h{Humidity_Out}));
 369                         $h{Rain_Month}  = nearest(0.1, unpack("s", substr $blk,52,2) * $rain_mult);
 370                         $h{Rain_Year}  = nearest(0.1, unpack("s", substr $blk,54,2) * $rain_mult);
 371                 }
 372
 373                 my $ts = time;
 374                 my $s;
 375                 my $dayno = int($ts/86400);
 376                 if ($dayno > $ld->{last_day}) {
 377                         $ld->{Temp_Out_Max} = $ld->{Temp_Out_Min} = $temp;
 378                         $ld->{last_day} = $dayno;
 379                         write_ld();
 380                         cycle_loop_data_files();
 381                 }
 382                 $ld->{Temp_Out_Max} = $temp if $temp > $ld->{Temp_Out_Max};
 383                 $ld->{Temp_Out_Min} = $temp if $temp < $ld->{Temp_Out_Min};
 384
 385                 if ($ts >= $ld->{last_hour} + 1800) {
 386                         $h{Pressure_Trend}    = unpack("C", substr $blk,3,1);
 387                         $h{Pressure_Trend_txt} = $bar_trend{$h{Pressure_Trend}};
 388                         $h{Batt_TX_OK}  = (unpack("C", substr $blk,86,1)+0) ^ 1;
 389                         $h{Batt_Console}  = nearest(0.01, unpack("s", substr $blk,87,2) * 0.005859375);
 390                         $h{Forecast_Icon}  = unpack("C", substr $blk,89,1);
 391                         $h{Forecast_Rule}  = unpack("C", substr $blk,90,1);
 392                         $h{Sunrise}  = sprintf( "%04d", unpack("S", substr $blk,91,2) );
 393                         $h{Sunrise}  =~ s/(\d{2})(\d{2})/$1:$2/;
 394                         $h{Sunset}   = sprintf( "%04d", unpack("S", substr $blk,93,2) );
 395                         $h{Sunset}  =~ s/(\d{2})(\d{2})/$1:$2/;
 396                         $h{Temp_Out_Max} = $ld->{Temp_Out_Max};
 397                         $h{Temp_Out_Min} = $ld->{Temp_Out_Min};
 398
 399                         if ($loop_count) {      # i.e not the first
 400                                 my $a = wind_average(scalar @{$ld->{wind_hour}} ? @{$ld->{wind_hour}} : {w => $h{Wind}, d => $h{Dir}});
 401
 402                                 $h{Wind_1h} = nearest(0.1, $a->{w});
 403                                 $h{Dir_1h} = nearest(0.1, $a->{d});
 404
 405                                 $a = wind_average(@{$ld->{wind_min}});
 406                                 $h{Wind_1m} = nearest(0.1, $a->{w});
 407                                 $h{Dir_1m} = nearest(1, $a->{d});
 408
 409                                 ($h{Rain_1m}, $h{Rain_1h}, $h{Rain_24h}) = calc_rain($rain);
 410                         }
 411                         $ld->{last_rain_min} = $ld->{last_rain_hour} = $rain;
 412
 413                         $last_hour_h = {%h};
 414                         $s = genstr($ts, 'h', \%h);
 415                         $ld->{lasthour_h} = $s;
 416
 417                         $ld->{last_hour} = int($ts/1800)*1800;
 418                         $ld->{last_min} = int($ts/60)*60;
 419                         @{$ld->{wind_hour}} = ();
 420                         @{$ld->{wind_min}} = ();
 421
 422                         write_ld();
 423
 424                 } elsif ($ts >= $ld->{last_min} + 60) {
 425                         my $a = wind_average(@{$ld->{wind_min}});
 426                         my %save;
 427
 428                         push @{$ld->{wind_hour}}, $a;
 429
 430                         if ($loop_count) {      # i.e not the first
 431                                 my $rm;
 432
 433                                 $h{Wind_1m} = nearest(0.1, $a->{w});
 434                                 $h{Dir_1m} = nearest(1, $a->{d});
 435                                 ($h{Rain_1m}, $h{Rain_1h}, $h{Rain_24h}) = calc_rain($rain);
 436                         }
 437                         $ld->{last_rain_min} = $rain;
 438
 439                         $h{Temp_Out_Max} = $ld->{Temp_Out_Max};
 440                         $h{Temp_Out_Min} = $ld->{Temp_Out_Min};
 441
 442                         $last_min_h = {%h};
 443                         $s = genstr($ts, 'm', \%h);
 444                         $ld->{lastmin_h} = $s;
 445
 446                         $ld->{last_min} = int($ts/60)*60;
 447                         @{$ld->{wind_min}} = ();
 448
 449                         write_ld();
 450
 451                 } else {
 452                         my $o = gen_hash_diff($ld->{last_h}, \%h);
 453                         if ($o) {
 454                                 $s = genstr($ts, 'r', $o);
 455                         }
 456                         else {
 457                                 dbg "loop rec not changed" if isdbg 'chan';
 458                         }
 459                 }
 460                 output_str($s) if $s;
 461                 $ld->{last_h} = \%h;
 462                 ++$loop_count;
 463         } else {
 464                 dbg "CRC check failed for LOOP data!";
 465         }
 466         return;
 467 }
 468
 469 sub genstr
 470 {
 471         my $ts = shift;
 472         my $let = shift;
 473         my $h = shift;
 474
 475         my $j =  $json->encode($h);
 476         my ($sec,$min,$hr) = (gmtime $ts)[0,1,2];
 477         my $tm = sprintf "%02d:%02d:%02d", $hr, $min, $sec;
 478
 479         return qq|{"tm":"$tm","t":$ts,"$let":$j}|;
 480 }
 481
 482 sub output_str
 483 {
 484         my $s = shift;
 485         dbg $s;
 486 #       say $s;
 487         $dlog->writenow($s);
 488         foreach my $ws (keys $WS) {
 489                 my $tx = $WS->{$ws};
 490                 if ($tx) {
 491                         $tx->send($s);
 492                 } else {
 493                         delete $WS->{$tx};
 494                 }
 495         }
 496 }
 497
 498 sub gen_hash_diff
 499 {
 500         my $last = shift;
 501         my $now = shift;
 502         my %o;
 503         my $count;
 504
 505         while (my ($k, $v) = each %$now) {
 506                 if ($last->{$k} ne $now->{$k}) {
 507                         $o{$k} = $v;
 508                         ++$count;
 509                 }
 510         }
 511         return $count ? \%o : undef;
 512 }
 513
 514 sub dew_point
 515 {
 516         my $temp = shift @_;
 517         my $rh   = shift @_;
 518
 519         #  Using the simplified approximation for dew point
 520         #  Accurate to 1 degree C for humidities > 50 %
 521         #  http://en.wikipedia.org/wiki/Dew_point
 522
 523         my $dewpoint = $temp - ((100 - $rh) / 5);
 524
 525         # this is the more complete one (which doesn't work)
 526         #my $a = 6.1121;
 527         #my $b = 18.678;
 528         #my $c = 257.14;
 529         #my $ytrh = log(($rh/100) + ($b * $temp) / ($c + $temp));
 530         #my $dewpoint = ($c * $ytrh) / ($b - $ytrh);
 531
 532         return $dewpoint;
 533 }
 534
 535 sub CRC_CCITT
 536 {
 537     # Expects packed data...
 538     my $data_str = shift @_;
 539
 540         my $crc = 0;
 541         my @lst = split //, $data_str;
 542         foreach my $data (@lst) {
 543                 my $data = unpack("c",$data);
 544
 545                 my $crc_prev = $crc;
 546                 my $index = $crc >> 8 ^ $data;
 547                 my $lhs = $crc_table[$index];
 548                 #print "lhs=$lhs, crc=$crc\n";
 549                 my $rhs = ($crc << 8) & 0xFFFF;
 550                 $crc = $lhs ^ $rhs;
 551
 552
 553         }
 554
 555         return $crc;
 556 }
 557
 558 sub f2c
 559 {
 560         return ($_[0] - 32) * 5/9;
 561 }
 562
 563 sub mph2mps
 564 {
 565         return $_[0] * 0.44704;
 566 }
 567
 568 sub in2mb
 569 {
 570         return $_[0] * 33.8637526;
 571 }
 572
 573 sub wind_average
 574 {
 575         my ($sindir, $cosdir, $wind);
 576         my $count;
 577
 578         foreach my $r (@_) {
 579                 $wind += $r->{w};
 580                 $sindir += sin(d2r($r->{d})) * $r->{w};
 581                 $cosdir += cos(d2r($r->{d})) * $r->{w};
 582                 ++$count;
 583         }
 584
 585         my $avhdg = r2d(atan2($sindir, $cosdir));
 586         $avhdg += 360 if $avhdg < 0;
 587         return {w => nearest(0.1,$wind / $count), d => nearest(0.1,$avhdg)};
 588 }
 589
 590 # radians to degrees
 591 sub r2d
 592 {
 593     my $n = shift;
 594     return ($n / pi) * 180;
 595 }
 596
 597 # degrees to radians
 598 sub d2r
 599 {
 600     my $n = shift;
 601     return ($n / 180) * pi;
 602 }
 603
 604 sub calc_rain
 605 {
 606         my $rain = shift;
 607
 608         $ld->{rain24} ||= [];
 609
 610         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
 611         my $rm = nearest(0.1, $rain >= $ld->{last_rain_min} ? $rain - $ld->{last_rain_min} : $rain);
 612         my $Rain_1m = nearest(0.1, $rm);
 613         push @{$ld->{rain24}}, $Rain_1m;
 614         $ld->{rain_24} += $rm;
 615         while (@{$ld->{rain24}} > 24*60) {
 616                 $ld->{rain_24} -= shift @{$ld->{rain24}};
 617         }
 618         my $Rain_24h = nearest(0.1, $ld->{rain_24});
 619         return ($Rain_1m, $Rain_1h, $Rain_24h);
 620 }
 621
 622 sub read_ld
 623 {
 624         unless ($dataf) {
 625                 open $dataf, "+>>", $datafn or die "cannot open $datafn $!";
 626                 $dataf->autoflush(1);
 627         }
 628
 629         seek $dataf, 0, 0;
 630         my $s = <$dataf>;
 631         chomp $s;
 632         dbg "read loop data: $s" if isdbg 'json';
 633         $ld = $json->decode($s) if length $s;
 634
 635         # sort out rain stats
 636         my $c;
 637         if ($ld->{rain24} && ($c = @{$ld->{rain24}}) < 24*60) {
 638                 my $diff = 24*60 - $c;
 639                 unshift @{$ld->{rain24}}, 0 for 0 .. $diff;
 640         }
 641         my $rain;
 642
 643         if ($ld->{rain24}) {
 644                 $rain += $_ for @{$ld->{rain24}};
 645         }
 646
 647         $ld->{rain_24} = nearest(0.1, $rain);
 648         delete $ld->{hour};
 649         delete $ld->{min};
 650 }
 651
 652 sub write_ld
 653 {
 654         unless ($dataf) {
 655                 open $dataf, "+>>", $datafn or die "cannot open $datafn $!";
 656                 $dataf->autoflush(1);
 657         }
 658
 659         seek $dataf, 0, 0;
 660         truncate $dataf, 0;
 661         $ld->{ts} = time;
 662         my $s = $json->encode($ld);
 663         dbg "write loop data: $s" if isdbg 'json';
 664         print $dataf "$s\n";
 665 }
 666
 667 sub cycle_loop_data_files
 668 {
 669         close $dataf if $dataf;
 670
 671         rename "$datafn.oooo", "$datafn.ooooo";
 672         rename "$datafn.ooo", "$datafn.oooo";
 673         rename "$datafn.oo", "$datafn.ooo";
 674         rename "$datafn.o", "$datafn.oo";
 675         copy $datafn, "$datafn.o";
 676 }
 677
 678 __DATA__
 679
 680 @@ index.html.ep
 681 % my $url = url_for 'weather';
 682 <!DOCTYPE html>
 683 <html>
 684   <head>
 685     <title>DWeather</title>
 686     <meta charset="utf-8">
 687     <meta http-equiv="X-UA-Compatible" content="IE=edge">
 688     <meta name="viewport" content="width=device-width, initial-scale=1">
 689
 690     <!-- Latest compiled and minified CSS -->
 691     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
 692
 693     <!-- Optional theme -->
 694     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap-theme.min.css">
 695
 696   </head>
 697   <body>
 698     <center><h1>High View Weather</h1></center>
 699
 700
 701     <script>
 702         var ws;
 703
 704         function process(key,value) {
 705                 var d = document.getElementById(key);
 706                 if (d !== null) {
 707                         d.innerHTML = value;
 708                 }
 709         }
 710
 711     function traverse(o) {
 712                 console.log(o);
 713                 for (var i in o) {
 714                         process(i, o[i]);
 715                         if (o[i] !== null && typeof(o[i])=="object") {
 716                                 traverse(o[i]);
 717                         }
 718                 }
 719         }
 720
 721
 722     ws = new WebSocket('<%= $url->to_abs %>');
 723     document.body.innerHTML += '<center>ws connecting to: <%= $url->to_abs %> type_of: ' + typeof(ws) + '</center><br>';
 724     if (typeof(ws) === 'object') {
 725                 ws.onmessage = function (event) {
 726                         var js = JSON.parse(event.data);
 727                         if (js !== null && typeof(js) === 'object') {
 728                                 traverse(js);
 729                         }
 730                 };
 731                 ws.onopen = function (event) {
 732                         ws.send('WebSocket support works! ♥');
 733                 };
 734         } else {
 735                 document.body.innerHTML += 'Webserver only works with Websocket aware browsers';
 736         }
 737
 738     </script>
 739
 740 <div id="container">
 741 <div id="start-template">
 742 <br><br>
 743 <table border=1 width=80% align="center">
 744 <tr>
 745 <th>Time:<td><span id="tm"> </span>
 746 <th>Sunrise:<td><span id="Sunrise"> </span>
 747 <th>Sunset:<td><span id="Sunset"> </span>
 748 <th>Console Volts:<td><span id="Batt_Console"> </span>
 749 <th>TX Battery OK:<td><span id="Batt_TX_OK"> </span>
 750
 751 <tr>
 752 <th>Pressure:<td><span id="Pressure"> </span>
 753 <th>Trend:<td><span id="Pressure_Trend_txt"> </span>
 754
 755 <tr>
 756 <th>Temperature in:<td> <span id="Temp_In"> </span>
 757 <th>Humidity:<td> <span id="Humidity_In"> </span>
 758
 759 <tr>
 760 <th>Temperature out:<td> <span id="Temp_Out"> </span>
 761 <th>Min:<td> <span id="Temp_Out_Min"> </span>
 762 <th>Max:<td> <span id="Temp_Out_Max"> </span>
 763 <th>Humidity:<td> <span id="Humidity_Out"> </span>
 764 <th>Dew Point:<td> <span id="Dew_Point"> </span>
 765
 766 <tr>
 767 <th>Wind Direction:<td> <span id="Dir"> </span>
 768 <th>Minute Avg:<td> <span id="Dir_1m">  </span>
 769 <th>Speed:<td> <span id="Wind"> </span>
 770 <th>Minute Avg:<td> <span id="Wind_1m">  </span>
 771
 772 <tr>
 773 <th>Rain 30mins:<td> <span id="Rain_1h"> </span>
 774 <th>Day:<td> <span id="Rain_Day"> </span>
 775 <th>24hrs:<td> <span id="Rain_24h"> </span>
 776 <th>Month:<td> <span id="Rain_Month"> </span>
 777 <th>Year:<td> <span id="Rain_Year"> </span>
 778 </table>
 779 </div>
 780 </div>
 781     <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
 782     <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
 783     <!-- Latest compiled and minified JavaScript -->
 784     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
 785 </body>
 786 </html>