initial commit
This commit is contained in:
Patrick Menschel
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A perl script to communication with a drs110m din rail power meter similar to my
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[pyehz](https://github.com/menschel/pyehz) project. This is considered a pre-step for
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integration in FHEM OBIS Module.
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Use and Copy as you wish.
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253
test_drs110m.pl
Executable file
253
test_drs110m.pl
Executable file
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#!/usr/bin/perl
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#
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# This is actually my first attempt with perl.
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# This script borrows parts of https://wiki.volkszaehler.org/hardware/channels/meters/power/eastron_drs155m
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# which itself borrows parts of http://www.ip-symcon.de/forum/threads/21407-Stromz%C3%A4hler-mit-RS485/page2
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# The general functions have been developed in python3, see https://github.com/menschel/pyehz
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# Use and copy as you wish.
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# Menschel (C) 2019
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use strict;
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use warnings;
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use Device::SerialPort;
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#for time conversion
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use POSIX::strptime qw( strptime );
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use POSIX qw{strftime};
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my $port = Device::SerialPort->new("/dev/ttyUSB0") || die $!;
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$port->baudrate(9600);
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$port->databits(7);
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$port->parity("even");
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$port->stopbits(1);
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$port->handshake("none");
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$port->write_settings;
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$port->purge_all();
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$port->read_char_time(0); # don't wait for each character
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$port->read_const_time(100); # 100 millisecond per unfulfilled "read" call
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my $serialID = "001613300153"; # The serial number of the specific device 12-digits long.
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# It is possible to find out the device id of a single device on RS-485 9600@7E1 by sending "/?!\r\n"
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my $password = "00000000"; # Standard password 0 over 8-digits
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my $verbose = 2 ;
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# ========================================
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sub sendgetserial {
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my ($cmd) = @_;
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my $count;
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my $saw;
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my $x;
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$port->lookclear;
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$port->write( $cmd );
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($count,$saw)=$port->read(84); # will read 84 chars
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$x=uc(unpack('H*',$saw)); # nach hex wandeln
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$cmd =~ s/\n/\\n/mg;
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$cmd =~ s/\r/\\r/mg;
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$saw =~ s/\n/\\n/mg;
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$saw =~ s/\r/\\r/mg;
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if ( $verbose>10 ) {
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printf "+++ sendserial\n" ;
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print " CMD: $cmd \n"; # gibt den Befehl in ASCII aus
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print " COUNT: $count \n"; # gibt die Anzahl der empfangenen Daten aus
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print " HEX: $x \n"; # gibt die empfangenen Daten in Hex aus
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print " ASCII: $saw \n"; # gibt die empfangenen Daten aus
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printf "--- sendserial\n" ;
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}
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return $saw;
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}
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# ========================================
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sub decodeVAL {
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my ($val) = @_;
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if ( $verbose>10 ) {
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printf "+++ decodeVAL\n" ;
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print " val = ( $val ) \n" ;
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}
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if($val =~ m/\((\d+)\)/) {
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if ( $verbose>10 ) {
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print " decoded val = $1\n";
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printf " --- decodeVAL\n" ;
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}
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return $1;
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}
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if($val =~ m/\((\S+)\)/) {#string value for temperature
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if ( $verbose>10 ) {
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print " decoded val = $1\n";
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printf " --- decodeVAL\n" ;
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}
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return $1;
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}
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print " val = ( $val ) \n" ;
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die "NICHTS gefunden!\n";
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print "NICHTS gefunden!\n";
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return -8888;
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}
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sub decodeVal1decimal {
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my ($val) = @_;
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return $val/10;
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}
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sub decodeVal10times {
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my ($val) = @_;
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return $val*10;
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}
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sub decodeVal1to1 {
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my ($val) = @_;
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return $val;
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}
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sub decodeValTime {
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#"19112703192714" => 2019-11-27 19:27:14
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my ($str) = @_;
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#print("$str \n");
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my $fmt = "%y%m%d0%w%H%M%S";
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my @time = (POSIX::strptime($str,$fmt))[0..7];
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#print("@time \n");
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return @time;
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};
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sub decodeValTemp {
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my ($val) = @_;
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my $hex = "";
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foreach (split '',$val){
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$hex .= sprintf("%X", ord($_)-0x30);
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};
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return hex($hex);
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};
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sub calc_bcc {
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my ($val) = @_;
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my $bcc = 0;
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foreach (split'',substr($val,1)){
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$bcc ^= ord($_);
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}
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return $bcc;
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};
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sub generate_r1_msg{
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my %args = @_;
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my $reg = $args{reg};
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my $regstr = sprintf("%08d()",$reg);
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my $msg=generate_programming_command_message("command"=>"R","commandtype"=>1,"data"=>$regstr);
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return $msg;
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};
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sub generate_p1_msg{
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my %args = @_;
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my $passwd = $args{password};
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my $passwdstr = sprintf("(%08d)",$passwd);
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my $msg=generate_programming_command_message("command"=>"P","commandtype"=>1,"data"=>$passwdstr);
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return $msg;
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};
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sub generate_b0_msg{
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my $msg=generate_programming_command_message("command"=>"B","commandtype"=>0,"data"=>"");
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return $msg;
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};
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sub generate_programming_command_message{
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my %args = @_;
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my $command = $args{command};
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my $commandtype = $args{commandtype};
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my $data = $args{data};
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my $cmdstr = sprintf("%s%d",$command,$commandtype);
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my $msg=chr(0x01).$cmdstr.chr(0x02).$data.chr(0x03);
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$msg .= chr(calc_bcc($msg));
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return $msg;
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};
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sub generate_ack_optionselect_msg{
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my %args = @_;
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my $protocol = $args{protocol};
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my $mode = $args{mode};
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my $msgstr = sprintf("%d:%d",$protocol,$mode);#the ':' is the baudrate identifier
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my $msg=chr(0x06).$msgstr.chr(0x0D).chr(0x0A);#Todo: make the special characters nicely, note there is no bcc for this msg type
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return $msg;
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};
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sub generate_request_message{
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my %args = @_;
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my $serialnumber = $args{serialnumber};
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my $msg = sprintf("/?%012d!\r\n",$serialnumber);
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return $msg;
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};
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# ========================================
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#main() starts here
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my $cmd;
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my $res;
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my %vals = ();
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$res = sendgetserial(generate_request_message("serialnumber"=>$serialID));
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#there is an automatic sleep from the serial timeout
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if (!$res){
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#a second wakeup call is not required every time but when the device was asleep.
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$res = sendgetserial(generate_request_message("serialnumber"=>$serialID));
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};
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$res = sendgetserial(generate_ack_optionselect_msg("protocol"=>0,"mode"=>1));#note: mode 1 is programming mode, obvious privileges are needed for register access
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$res = sendgetserial(generate_p1_msg("password"=>$password));
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#read registers, Todo: make this a loop over a HASH for easy usage
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$res = sendgetserial( generate_r1_msg("reg"=>0) );
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$vals { 'Voltage' } = decodeVal1decimal( decodeVAL $res );
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$res = sendgetserial( generate_r1_msg("reg"=>1) );
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$vals { 'Current' } = decodeVal1decimal( decodeVAL $res );
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$res = sendgetserial( generate_r1_msg("reg"=>2) );
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$vals { 'Frequency' } = decodeVal1decimal( decodeVAL $res );
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$res = sendgetserial( generate_r1_msg("reg"=>3) );
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$vals { 'Active Power' } = decodeVal10times( decodeVAL $res );
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$res = sendgetserial( generate_r1_msg("reg"=>4) );
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$vals { 'Reactive Power' } = decodeVal10times( decodeVAL $res );
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$res = sendgetserial( generate_r1_msg("reg"=>5) );
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$vals { 'Apparent Power' } = decodeVal10times( decodeVAL $res );
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$res = sendgetserial( generate_r1_msg("reg"=>6) );
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$vals { 'cosphi' } = decodeVal1to1( decodeVAL $res ) / 1000 ;
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$res = sendgetserial( generate_r1_msg("reg"=>10) );
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$vals { 'Active Energy' } = decodeVal1to1( decodeVAL $res ) * 1 ;
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$res = sendgetserial( generate_r1_msg("reg"=>31) );
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$vals { 'Time' } = strftime("%Y-%m-%d %H:%M:%S",decodeValTime( decodeVAL $res ));
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$res = sendgetserial( generate_r1_msg("reg"=>32) );
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$vals { 'Temperature' } = decodeValTemp( decodeVAL $res ) ;
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$res = sendgetserial(generate_b0_msg());
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while ( my ($key, $value) = each(%vals) ) {
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my $str = sprintf("%15s : %s \n",$key,$value);
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print($str);
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}
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