Sending UDP Packets from Perl Script to SImulink
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Hello Everyone ,
I have bunch of numbers which I get from a hardware which needs to be sent to Simulink via UDP-Ethernet connection. I tried to use UDP Receive block in Simulink and exported the data to workspace. But I am not able to get any data .. What i get is all zeros.
Here is the sample Perl Script
#!/usr/bin/perl
#udpclient.pl
use IO::Socket;
use warnings;
use Time::HiRes qw (sleep);
my ($socket,$data);
#my $in_file_name = $ARGV[0];
$in_file_name='C:\Users\PQRST\Documents\Example.csv';
open(INFILE,"<",$in_file_name) or die "Not able to open test file $!";
$socket = IO::Socket::INET->new (PeerAddr => 'localhost',
PeerPort => 5005,
Type => SOCK_DGRAM,
Proto => 'udp') or die "ERROR in
+ Socket Creation : $!\n";
while (<INFILE>)
{
chomp;
if($. != 1) #skip first line
{
$data=$_; # Data would be in String format
$socket->send("$data");
sleep(0.25);
}
}
$socket->close();
Instead of directly running the script on hardware , I am just sending the data to myself ("localhost") and I am keeping '0.0.0.0' at port 5005 to receive data from all. Can anyone give me insight on this .. Any help would be appreciated...
2 commentaires
Walter Roberson
le 25 Août 2016
Did you experiment with sending a constant string and seeing what comes out?
Réponses (1)
Pawel Ladosz
le 25 Août 2016
Hi A P S,
Usually when we had this type of problem it was either of two things:
1. Your data type/length is not defined correctly on UDP receive end (less likely as you have managed to have some success before)
2. Your data is not being received/send on right ip adress/port. Instead of defining your address as localhost in your pearl script I recommend you define it as actual IP address (IP address of machine you are on). Same goes for UDP receive, just define IP of receiver as the machine you are on.
Let me know if this worked for you
4 commentaires
Pawel Ladosz
le 26 Août 2016
Change your "data Type" to Double and leave length as 1 in UDP receive2 block. Also for testing I recommend you attach a Display block and see what is going on much quicker
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