From 72d2ded0ea9c38f3ae9d498134c89ee749aa71e4 Mon Sep 17 00:00:00 2001
From: Michael Gernoth <michael@gernoth.net>
Date: Wed, 30 Jan 2019 17:32:31 +0100
Subject: [PATCH] Implement fetching values from IFM IoTcore

Sample configuration is in ifmdl-temperature.conf, AL13xx with
attached TD2501 on port 1.
---
 ifmdl-temperature.conf | 25 +++++++++++++++++++++++++
 upsgraph.pl            | 21 +++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 ifmdl-temperature.conf

diff --git a/ifmdl-temperature.conf b/ifmdl-temperature.conf
new file mode 100644
index 0000000..3f9dd94
--- /dev/null
+++ b/ifmdl-temperature.conf
@@ -0,0 +1,25 @@
+package UPSGRAPH;
+
+$outdir="/var/www/html/temperature/";
+$step=60;
+
+$hosts = [
+	{
+		'address' => "10.133.0.9",
+		'name' => "al13-og",
+		'rrdfile' => "/var/spool/upsgraph/temp.al13-og.rrd",
+
+		'fields' => [ 'TD2501' ],
+
+		'vars' => {
+			'TD2501' => {
+				'name' => 'TD2501',
+				'url' => 'http://10.133.0.9/iolinkmaster/port[1]/iolinkdevice/pdin/getdata',
+				'proto' => 'iotcore',
+				'factor' => 1/10,
+			},
+		}
+	},
+];
+
+1;
diff --git a/upsgraph.pl b/upsgraph.pl
index adf33c9..55c6a62 100755
--- a/upsgraph.pl
+++ b/upsgraph.pl
@@ -15,6 +15,8 @@ use IO::Select;
 use RRDs;
 use File::Copy;
 use Data::Dumper;
+use LWP::UserAgent;
+use JSON;
 
 $UPSGRAPH::outdir = "";
 $UPSGRAPH::daysCovered = 370;
@@ -186,6 +188,23 @@ sub fetch_tcp_multi(@) {
 	%values;
 }
 
+sub fetch_iotcore(@) {
+	my $url = shift;
+
+	my $ua = LWP::UserAgent->new;
+	$ua->timeout(1);
+
+	my $resp = $ua->get($url);
+	return undef if (!$resp->is_success);
+
+	my $pdin = decode_json($resp->decoded_content);
+	return undef if (!defined($pdin));
+
+	my $value = hex($pdin->{'data'}->{'value'});
+
+	$value;
+}
+
 sub dayGraphFunc {
 	my $dataSrc = shift;
 	my $mode = shift;
@@ -477,6 +496,8 @@ while(1) {
 					@multi_values{keys %values} = values %values;
 					$result = $multi_values{$vars->{$var}->{'multi_id'}};
 				}
+			} elsif ($vars->{$var}->{'proto'} eq 'iotcore') {
+				$result = fetch_iotcore($vars->{$var}->{'url'});
 			}
 
 			next unless (defined $result);
-- 
2.39.2