From e85bd6b8716a6fb6245c03808c26b106481b0162 Mon Sep 17 00:00:00 2001
From: Guido Günther <agx@sigxcpu.org>
Date: Thu, 25 Dec 2014 15:18:15 +0100
Subject: Add plugin for combustion chamber temperatures

---
 pellematic-temp2 | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100755 pellematic-temp2

diff --git a/pellematic-temp2 b/pellematic-temp2
new file mode 100755
index 0000000..320103f
--- /dev/null
+++ b/pellematic-temp2
@@ -0,0 +1,158 @@
+#!/usr/bin/python
+# vim: set fileencoding=utf-8 :
+#
+# Munin plugin to monitor the temperature values
+# of the pellematic burning chamber
+#
+# Copyright 2013 Guido Günther <agx@sigxcpu.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# depends: python-requests
+#
+#%# capabilities=autoconf
+#%# family=contrib
+
+import requests
+import os
+import re
+import sys
+import json
+
+username = os.getenv('username', 'oekofen')
+password = os.getenv('password', username)
+debug = os.getenv('debug')
+url = os.getenv('url')
+
+# The items we want to plot:
+items = {
+    "CAPPL:FA[0].L_feuerraumtemperatur":
+    'Combustion Chamber Temp',
+    "CAPPL:FA[0].L_feuerraumtemperatur_soll":
+    'Combustion Chamber Temp Set',
+    "CAPPL:FA[0].L_agt_zuend_flammueb":
+    'Flue Gas Temp Ignition Control',
+}
+
+def fixup(name):
+    return name
+
+def canon(name):
+    return re.sub(r"[^a-zA-Z0-9_]", "_", name)
+
+def get_name(item):
+    if item['shortText'] != '???':
+        return fixup(item['shortText'])
+    else:
+        return items[item['name']]
+
+def print_config(url):
+    print """graph_title Pellematic Combustion Chamber Temperature values
+graph_vlabel Temperature in Degree Celsius
+graph_category Heating
+graph_info This graph shows the temperature values of the combustion chamber of a pellematic"""
+
+    out = fetch_raw(url)
+    for item in out:
+        name = get_name(item)
+        if name:
+            print "%s.label %s" % (canon(name), name)
+            print "%s.type GAUGE" % canon(name)
+            thickness = 1 if name.endswith(' Set') else 2
+            print "%s.draw LINE%d" % (canon(name), thickness)
+
+def degree_celsius(val):
+    return float(int(val['value'])) / float(val['divisor'])
+
+def fetch_raw(url):
+    # Perform authentication and get the cookie
+    auth_formdata = {'language': 'en',
+                     'username': username,
+                     'password': password,
+                     'submit': 'Login',
+                     }
+    r = requests.post(url, data=auth_formdata)
+
+    pksession = r.cookies['pksession']
+    cookies = { 'pksession': pksession,
+                'language': 'en' }
+    params = { 'action': 'get',
+               'attr': '1',
+             }
+
+    # These are the headers used by the supplied application
+    # It mostly doesn't matter what we pass but the backend
+    # breaks with a lua error without a Accept-Language header:
+    headers = {'Accept': 'application/json',
+               'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
+               'Accept-Language': 'en',
+              }
+
+    # The items to fetch are passed as simple json string
+    payload = json.dumps(items.keys())
+    r = requests.post(url,
+                      data=payload,
+                      params=params,
+                      cookies=cookies,
+                      headers=headers)
+
+    if hasattr(r.json, '__call__'):
+        ret = r.json()
+    else: # in requests 0.12 json isn't a callable
+        ret = r.json
+
+    if debug:
+        print >>sys.stderr, ret
+
+    return ret
+
+def fetch_values(url):
+    out = fetch_raw(url)
+    for item in out:
+        name = get_name(item)
+        if name:
+            print "%s.value %.2f" % (name,
+                                     degree_celsius(item))
+
+
+def main(args):
+    if not url:
+        print >>sys.stderr, "No url< configured"
+        return 1
+    if len(args) > 1:
+        if args[1] in [ 'autoconf', 'detect' ]:
+            try:
+                fetch_raw(url)
+                print "yes"
+                return 0
+            except:
+                print "no"
+                return 1
+        elif args[1] == 'config':
+            try:
+                print_config(url)
+            except Exception as e:
+                print >>sys.stderr, "Failed to fetch config: '%s'" % e
+                return 1
+            return 0
+    try:
+        fetch_values(url)
+    except Exception as e:
+        print >>sys.stderr, "Failed to fetch values: '%s'" % e
+        return 1
+    return 0
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))
-- 
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