loop.pl

   1 #!/usr/bin/perl
   2 use strict;
   3
   4 use v5.10.1;
   5
   6 use Serial;
   7 use Mojo::IOLoop;
   8 use Mojo::IOLoop::Stream;
   9 use Mojo::JSON  qw(decode_json encode_json);
  10 use Debug;
  11 use SMGLog;
  12
  13 my $devname = "/dev/davis";
  14 my $rain_mult = 0.2;                            # 0.1 or 0.2 mm or 0.01 inches
  15 my $tid;
  16 my $rid;
  17 my $count;
  18 my $state = "ready";
  19 my $buf;
  20 my $dbg;
  21 my $last_reading;
  22
  23 our     @crc_table = (
  24                                   0x0, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
  25                                   0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
  26                                   0x1231, 0x210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
  27                                   0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
  28                                   0x2462, 0x3443, 0x420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
  29                                   0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
  30                                   0x3653, 0x2672, 0x1611, 0x630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
  31                                   0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
  32                                   0x48c4, 0x58e5, 0x6886, 0x78a7, 0x840, 0x1861, 0x2802, 0x3823,
  33                                   0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
  34                                   0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0xa50, 0x3a33, 0x2a12,
  35                                   0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
  36                                   0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0xc60, 0x1c41,
  37                                   0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
  38                                   0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0xe70,
  39                                   0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
  40                                   0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
  41                                   0x1080, 0xa1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
  42                                   0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
  43                                   0x2b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
  44                                   0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
  45                                   0x34e2, 0x24c3, 0x14a0, 0x481, 0x7466, 0x6447, 0x5424, 0x4405,
  46                                   0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
  47                                   0x26d3, 0x36f2, 0x691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
  48                                   0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
  49                                   0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x8e1, 0x3882, 0x28a3,
  50                                   0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
  51                                   0x4a75, 0x5a54, 0x6a37, 0x7a16, 0xaf1, 0x1ad0, 0x2ab3, 0x3a92,
  52                                   0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
  53                                   0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0xcc1,
  54                                   0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
  55                                   0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0xed1, 0x1ef0
  56                                  );
  57
  58 our %bar_trend;
  59
  60 $bar_trend{-60} = "Falling Rapidly";
  61 $bar_trend{196} = "Falling Rapidly";
  62 $bar_trend{-20} = "Falling Slowly";
  63 $bar_trend{236} = "Falling Slowly";
  64 $bar_trend{0} = "Steady";
  65 $bar_trend{20} = "Rising Slowly";
  66 $bar_trend{60} = "Rising Rapidly";
  67
  68 #$SIG{TERM} = $SIG{INT} = sub {Mojo::IOLoop->stop if Mojo::IOLoop->is_running && !$DB::VERSION};
  69
  70 dbginit();
  71 if (@ARGV) {
  72         dbgadd(@ARGV);
  73 }
  74 dbgadd('chan');
  75
  76
  77 my $dlog = SMGLog->new("day");
  78 $dlog->mode('a');
  79
  80 my $s = do_open($devname);
  81 start_loop();
  82
  83 Mojo::IOLoop->recurring(0.1 => sub { $dlog->flushall });
  84
  85 Mojo::IOLoop->start unless Mojo::IOLoop->is_running;
  86
  87 exit 0;
  88
  89 sub on_read
  90 {
  91         my ($str, $d) = @_;
  92         $buf .= $d;
  93         $d =~ s/([\%\x00-\x1f\x7f-\xff])/sprintf("%%%02X", ord($1))/eg;
  94         dbg "read added '$d' buf lth=" . length $buf if isdbg('raw');
  95         if ($state eq 'waitnl' && $buf =~ /[\cJ\cM]+/) {
  96                 Mojo::IOLoop->remove($tid);
  97                 undef $buf;
  98                 $s->write("LPS 1 1\n");
  99                 chgstate("waitloop");
 100         } elsif ($state eq "waitloop") {
 101                 if ($buf =~ /\x06/) {
 102                         chgstate('waitlooprec');
 103                         undef $buf;
 104                 }
 105         } elsif ($state eq 'waitlooprec') {
 106                 if (length $buf >= 99) {
 107                         dbg "got loop record\n" if isdbg('chan');
 108
 109                         chgstate('');
 110                         process($buf);
 111                         undef $buf;
 112                 }
 113         }
 114 }
 115
 116 sub start_loop
 117 {
 118         dbg "writing \\n" if isdbg('chan');
 119
 120         $s->write("\n");
 121         $tid = Mojo::IOLoop->recurring(0.6 => sub {dbg "writing \\n" if isdbg('chan'); $s->write("\n")});
 122
 123         chgstate("waitnl");
 124 }
 125
 126 sub chgstate
 127 {
 128         dbg "state '$state' -> '$_[0]'" if isdbg('chan');
 129
 130         $state = $_[0];
 131 }
 132
 133 sub do_open
 134 {
 135         my $name = shift;
 136         my $ob = Serial->new($name, 19200) || die "$name $!\n";
 137         dbg "streaming $name fileno(", fileno($ob), ")" if isdbg('chan');
 138
 139         my $str = Mojo::IOLoop::Stream->new($ob);
 140         $str->on(error=>sub {dbg "serial $_[1]"; undef $s; Mojo::IOLoop->reset;});
 141
 142         $str->on(close=>sub {dbg "serial closing"; undef $s;  Mojo::IOLoop->reset;});
 143         $str->on(timeout=>sub {dbg "serial timeout";});
 144         $str->on(read=>sub {on_read(@_)});
 145         $str->start;
 146
 147         $rid = Mojo::IOLoop->recurring(2.5 => sub {
 148                                                                            start_loop() if !$state || $state eq "waitnl";
 149                                                                    });
 150
 151         return $str;
 152 }
 153
 154 our $last_min = time;
 155 our $last_hour = time;
 156
 157 my @min;
 158 my @hour;
 159
 160 sub process
 161 {
 162         my $blk = shift;
 163         my $loo =  substr $blk,0,3;
 164         unless ( $loo eq 'LOO') {
 165                 dbg "Block invalid loo -> $loo" if isdbg('chan'); return;
 166         }
 167
 168         my $t;
 169         my %h;
 170
 171         # Common ones
 172         $h{Pressure_Trend}    = unpack("C", substr $blk,3,1);
 173         $h{Pressure_Trend_txt} = $bar_trend{$h{'Pressure_Trend'}};
 174         $t = unpack("s", substr $blk,7,2) / 1000;
 175         $h{Pressure} = sprintf("%.0f",in2mb($t))+0;
 176
 177         $t = unpack("s", substr $blk,9,2) / 10;
 178         $h{Temp_In} = sprintf("%.1f", f2c($t))+0;
 179
 180         $t  = unpack("s", substr $blk,12,2) / 10;
 181         $h{Temp_Out}  = sprintf("%.1f", f2c($t))+0;
 182
 183         $t = unpack("C", substr $blk,14,1);
 184         $h{Wind} = sprintf("%.1f",mph2mps($t))+0;
 185         $h{Dir}     = unpack("s", substr $blk,16,2)+0;
 186
 187         my $wind = {w => $h{Wind}, d => $h{Dir}};
 188         push @min, $wind;
 189
 190         $h{'Humidity_Out'} = unpack("C", substr $blk,33,1)+0;
 191         $h{'Humidity_In'}  = unpack("C", substr $blk,11,1)+0;
 192
 193         $t = unpack("C", substr $blk,43,1)+0;
 194         $h{'UV'} = $t unless $t >= 255;
 195         $t = unpack("s", substr $blk,44,2)+0;   # watt/m**2
 196         $h{'Solar'} = $t unless $t >= 32767;
 197
 198         $h{'Rain_Rate'}  = sprintf("%0.1f",unpack("s", substr $blk,41,2) * $rain_mult)+0;
 199         $h{'Rain_Day'}   = sprintf("%0.1f", unpack("s", substr $blk,50,2) * $rain_mult)+0;
 200
 201         # what sort of packet is it?
 202
 203         $t =  unpack("C", substr $blk,4,1);
 204         if ($t) {
 205
 206                 # Newer LOOP2 packet
 207                 $t = unpack("C", substr $blk,18,2);
 208 #               $h{Wind_Avg_10} = sprintf("%.1f",mph2mps($t/10))+0;
 209                 $t = unpack("C", substr $blk,20,2);
 210 #               $h{Wind_Avg_2} = sprintf("%.1f",mph2mps($t/10))+0;
 211                 $t = unpack("C", substr $blk,22,2);
 212 #               $h{Wind_Gust_10} = sprintf("%.1f",mph2mps($t/10))+0;
 213
 214 #               $h{Dir_Avg_10} = unpack("C", substr $blk,24,2)+0;
 215                 $t = unpack("C", substr $blk,30,2);
 216                 $h{Dew_Point} = sprintf("%0.1f", f2c($t))+0;
 217
 218         } else {
 219
 220                 # Older LOOP packet
 221                 $t = unpack("C", substr $blk,15,1);
 222 #               $h{Wind_Avg_10} = sprintf("%.1f",mph2mps($t))+0;
 223                 $h{'Dew_Point'}  = sprintf("%0.1f", dew_point($h{Temp_Out}, $h{'Humidity_Out'}))+0;
 224
 225                 $h{'Rain_Month'}  = sprintf("%0.1f", unpack("s", substr $blk,52,2) * $rain_mult)+0;
 226                 $h{'Rain_Year'}  = sprintf("%0.1f", unpack("s", substr $blk,54,2) * $rain_mult)+0;
 227
 228
 229                 $h{'Batt_TX_OK'}  = (unpack("C", substr $blk,86,1)+0) ^ 1;
 230                 $h{'Batt_Console'}  = sprintf("%0.2f", unpack("s", substr $blk,87,2) * 0.005859375)+0;
 231                 $h{'Forecast_Icon'}  = unpack("C", substr $blk,89,1);
 232                 $h{'Forecast_Rule'}  = unpack("C", substr $blk,90,1);
 233
 234                 $h{'Sunrise'}  = sprintf( "%04d", unpack("S", substr $blk,91,2) );
 235                 $h{'Sunrise'}  =~ s/(\d{2})(\d{2})/$1:$2/;
 236                 $h{'Sunset'}   = sprintf( "%04d", unpack("S", substr $blk,93,2) );
 237                 $h{'Sunset'}  =~ s/(\d{2})(\d{2})/$1:$2/;
 238         }
 239
 240         my $crc = unpack "%n", substr($blk,97,2);
 241         my $crc_calc = CRC_CCITT($blk);
 242
 243         if ($crc_calc==0) {
 244                 my $o = gen_hash_diff($last_reading, \%h);
 245                 $last_reading = \%h;
 246                 my $t = time;
 247                 my $j;
 248                 my $s;
 249                 if ($t >= $last_min + 60) {
 250                         my $a = average(@min);
 251                         push @hour, $a;
 252
 253                         $h{Wind_1m} = sprintf("%0.1f", $a->{w})+0;
 254                         $h{Dir_1m} = sprintf("%0.0f", $a->{d})+0;
 255
 256                         $j = encode_json(\%h);
 257                         $s = qq|{"t":$t,"m":$j}|;
 258                         $last_min = $t;
 259                         if ($t >= $last_hour + 3600) {
 260                                 my $a = average(@hour);
 261
 262                                 delete $h{Wind_1m};
 263                                 delete $h{Dir_1m};
 264                                 $h{Wind_1h} = sprintf("%0.1f", $a->{w})+0;
 265                                 $h{Dir_1h} = sprintf("%0.0f", $a->{d})+0;
 266
 267                                 $j = encode_json(\%h);
 268                                 $s = qq|{"t":$t,"h":$j}|;
 269                                 $last_hour = $t;
 270                         }
 271                 } elsif ($o) {
 272                         $j = encode_json($o);
 273                         $s = qq|{"t":$t,"r":$j}|;
 274                 }
 275                 if ($s) {
 276                         dbg $s;
 277                         $dlog->writenow($s);
 278                 }
 279         } else {
 280                 dbg "CRC check failed for LOOP data!";
 281         }
 282 }
 283
 284 sub gen_hash_diff
 285 {
 286         my $last = shift;
 287         my $now = shift;
 288         my %o;
 289         my $count;
 290
 291         while (my ($k, $v) = each %$now) {
 292                 if ($last->{$k} ne $now->{$k}) {
 293                         $o{$k} = $v;
 294                         ++$count;
 295                 }
 296         }
 297         return $count ? \%o : undef;
 298 }
 299
 300 sub dew_point
 301 {
 302         my $temp = shift @_;
 303         my $rh   = shift @_;
 304
 305         #  Using the simplified approximation for dew point
 306         #  Accurate to 1 degree C for humidities > 50 %
 307         #  http://en.wikipedia.org/wiki/Dew_point
 308
 309         my $dewpoint = $temp - ((100 - $rh) / 5);
 310
 311         # this is the more complete one (which doesn't work)
 312         #my $a = 6.1121;
 313         #my $b = 18.678;
 314         #my $c = 257.14;
 315         #my $ytrh = log(($rh/100) + ($b * $temp) / ($c + $temp));
 316         #my $dewpoint = ($c * $ytrh) / ($b - $ytrh);
 317
 318         return $dewpoint;
 319 }
 320
 321 sub CRC_CCITT
 322 {
 323     # Expects packed data...
 324     my $data_str = shift @_;
 325
 326         my $crc = 0;
 327         my @lst = split //, $data_str;
 328         foreach my $data (@lst) {
 329                 my $data = unpack("c",$data);
 330
 331                 my $crc_prev = $crc;
 332                 my $index = $crc >> 8 ^ $data;
 333                 my $lhs = $crc_table[$index];
 334                 #print "lhs=$lhs, crc=$crc\n";
 335                 my $rhs = ($crc << 8) & 0xFFFF;
 336                 $crc = $lhs ^ $rhs;
 337
 338
 339         }
 340
 341         return $crc;
 342 }
 343
 344 sub f2c
 345 {
 346         return ($_[0] - 32) * 5/9;
 347 }
 348
 349 sub mph2mps
 350 {
 351         return $_[0] * 0.44704;
 352 }
 353
 354 sub in2mb
 355 {
 356         return $_[0] * 33.8637526;
 357 }
 358
 359 sub average
 360 {
 361         my %out;
 362         my $count;
 363
 364         foreach my $r (@_) {
 365                 while (my ($k, $v) = each %$r) {
 366                         $out{$k} += $v;
 367                 }
 368                 ++$count;
 369         }
 370         while (my ($k, $v) = each %out) {
 371                 $out{$k} /= $count;
 372         }
 373
 374         return \%out;
 375 }