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Bernd Wurst authored on08/03/2012 15:58:38
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+                    GNU GENERAL PUBLIC LICENSE
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+                       Version 3, 29 June 2007
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+
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+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+patent against the party.
498
+
499
+  If you convey a covered work, knowingly relying on a patent license,
500
+and the Corresponding Source of the work is not available for anyone
501
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502
+publicly available network server or other readily accessible means,
503
+then you must either (1) cause the Corresponding Source to be so
504
+available, or (2) arrange to deprive yourself of the benefit of the
505
+patent license for this particular work, or (3) arrange, in a manner
506
+consistent with the requirements of this License, to extend the patent
507
+license to downstream recipients.  "Knowingly relying" means you have
508
+actual knowledge that, but for the patent license, your conveying the
509
+covered work in a country, or your recipient's use of the covered work
510
+in a country, would infringe one or more identifiable patents in that
511
+country that you have reason to believe are valid.
512
+
513
+  If, pursuant to or in connection with a single transaction or
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+arrangement, you convey, or propagate by procuring conveyance of, a
515
+covered work, and grant a patent license to some of the parties
516
+receiving the covered work authorizing them to use, propagate, modify
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+or convey a specific copy of the covered work, then the patent license
518
+you grant is automatically extended to all recipients of the covered
519
+work and works based on it.
520
+
521
+  A patent license is "discriminatory" if it does not include within
522
+the scope of its coverage, prohibits the exercise of, or is
523
+conditioned on the non-exercise of one or more of the rights that are
524
+specifically granted under this License.  You may not convey a covered
525
+work if you are a party to an arrangement with a third party that is
526
+in the business of distributing software, under which you make payment
527
+to the third party based on the extent of your activity of conveying
528
+the work, and under which the third party grants, to any of the
529
+parties who would receive the covered work from you, a discriminatory
530
+patent license (a) in connection with copies of the covered work
531
+conveyed by you (or copies made from those copies), or (b) primarily
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+for and in connection with specific products or compilations that
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+contain the covered work, unless you entered into that arrangement,
534
+or that patent license was granted, prior to 28 March 2007.
535
+
536
+  Nothing in this License shall be construed as excluding or limiting
537
+any implied license or other defenses to infringement that may
538
+otherwise be available to you under applicable patent law.
539
+
540
+  12. No Surrender of Others' Freedom.
541
+
542
+  If conditions are imposed on you (whether by court order, agreement or
543
+otherwise) that contradict the conditions of this License, they do not
544
+excuse you from the conditions of this License.  If you cannot convey a
545
+covered work so as to satisfy simultaneously your obligations under this
546
+License and any other pertinent obligations, then as a consequence you may
547
+not convey it at all.  For example, if you agree to terms that obligate you
548
+to collect a royalty for further conveying from those to whom you convey
549
+the Program, the only way you could satisfy both those terms and this
550
+License would be to refrain entirely from conveying the Program.
551
+
552
+  13. Use with the GNU Affero General Public License.
553
+
554
+  Notwithstanding any other provision of this License, you have
555
+permission to link or combine any covered work with a work licensed
556
+under version 3 of the GNU Affero General Public License into a single
557
+combined work, and to convey the resulting work.  The terms of this
558
+License will continue to apply to the part which is the covered work,
559
+but the special requirements of the GNU Affero General Public License,
560
+section 13, concerning interaction through a network will apply to the
561
+combination as such.
562
+
563
+  14. Revised Versions of this License.
564
+
565
+  The Free Software Foundation may publish revised and/or new versions of
566
+the GNU General Public License from time to time.  Such new versions will
567
+be similar in spirit to the present version, but may differ in detail to
568
+address new problems or concerns.
569
+
570
+  Each version is given a distinguishing version number.  If the
571
+Program specifies that a certain numbered version of the GNU General
572
+Public License "or any later version" applies to it, you have the
573
+option of following the terms and conditions either of that numbered
574
+version or of any later version published by the Free Software
575
+Foundation.  If the Program does not specify a version number of the
576
+GNU General Public License, you may choose any version ever published
577
+by the Free Software Foundation.
578
+
579
+  If the Program specifies that a proxy can decide which future
580
+versions of the GNU General Public License can be used, that proxy's
581
+public statement of acceptance of a version permanently authorizes you
582
+to choose that version for the Program.
583
+
584
+  Later license versions may give you additional or different
585
+permissions.  However, no additional obligations are imposed on any
586
+author or copyright holder as a result of your choosing to follow a
587
+later version.
588
+
589
+  15. Disclaimer of Warranty.
590
+
591
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599
+
600
+  16. Limitation of Liability.
601
+
602
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610
+SUCH DAMAGES.
611
+
612
+  17. Interpretation of Sections 15 and 16.
613
+
614
+  If the disclaimer of warranty and limitation of liability provided
615
+above cannot be given local legal effect according to their terms,
616
+reviewing courts shall apply local law that most closely approximates
617
+an absolute waiver of all civil liability in connection with the
618
+Program, unless a warranty or assumption of liability accompanies a
619
+copy of the Program in return for a fee.
620
+
621
+                     END OF TERMS AND CONDITIONS
622
+
623
+            How to Apply These Terms to Your New Programs
624
+
625
+  If you develop a new program, and you want it to be of the greatest
626
+possible use to the public, the best way to achieve this is to make it
627
+free software which everyone can redistribute and change under these terms.
628
+
629
+  To do so, attach the following notices to the program.  It is safest
630
+to attach them to the start of each source file to most effectively
631
+state the exclusion of warranty; and each file should have at least
632
+the "copyright" line and a pointer to where the full notice is found.
633
+
634
+    <one line to give the program's name and a brief idea of what it does.>
635
+    Copyright (C) <year>  <name of author>
636
+
637
+    This program is free software: you can redistribute it and/or modify
638
+    it under the terms of the GNU General Public License as published by
639
+    the Free Software Foundation, either version 3 of the License, or
640
+    (at your option) any later version.
641
+
642
+    This program is distributed in the hope that it will be useful,
643
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
644
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645
+    GNU General Public License for more details.
646
+
647
+    You should have received a copy of the GNU General Public License
648
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
649
+
650
+Also add information on how to contact you by electronic and paper mail.
651
+
652
+  If the program does terminal interaction, make it output a short
653
+notice like this when it starts in an interactive mode:
654
+
655
+    <program>  Copyright (C) <year>  <name of author>
656
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657
+    This is free software, and you are welcome to redistribute it
658
+    under certain conditions; type `show c' for details.
659
+
660
+The hypothetical commands `show w' and `show c' should show the appropriate
661
+parts of the General Public License.  Of course, your program's commands
662
+might be different; for a GUI interface, you would use an "about box".
663
+
664
+  You should also get your employer (if you work as a programmer) or school,
665
+if any, to sign a "copyright disclaimer" for the program, if necessary.
666
+For more information on this, and how to apply and follow the GNU GPL, see
667
+<http://www.gnu.org/licenses/>.
668
+
669
+  The GNU General Public License does not permit incorporating your program
670
+into proprietary programs.  If your program is a subroutine library, you
671
+may consider it more useful to permit linking proprietary applications with
672
+the library.  If this is what you want to do, use the GNU Lesser General
673
+Public License instead of this License.  But first, please read
674
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
0 675
new file mode 100644
... ...
@@ -0,0 +1,39 @@
1
+This document is in german language. Feel free to translate.
2
+
3
+
4
+Unter dem Markennamen "SolarMax" vertreibt die schweizer Firma 
5
+Sputnik Engineering AG Fotovoltaik-Wechselrichter.
6
+
7
+Die SolarMax-Wechselrichter lassen sich mit normaler Ethernet-Verbindung 
8
+abfragen und nutzen dabei ein (gewissermaßen) Text-basiertes Protokoll über
9
+eine TCP-Verbindung.
10
+
11
+Das verwendete Protokoll wurde von mir reverse engineered (mittels 
12
+Netzwerk-capturing bei Verwendung der MaxTalk-Software).
13
+
14
+Erst nach Implementierung der Basisfunktionalität erhielt ich doch
15
+noch eine Dokumentation des verwendeten Protokolls vom Hersteller.
16
+Die Lizenz dieser Schnittstellenbeschreibung erlaubt es jedoch nicht, 
17
+diese öffentlich zu machen:
18
+| Der Nutzer sieht davon ab, das Datenprotokoll Dritten 
19
+| gegenüber offenzulegen. Weiter sieht er davon ab, das 
20
+| MaxComm Datenprotokoll zur serienmässigen Herstellung 
21
+| von Datenvisualisierungs und –überwachungsgeräten sowie 
22
+| von Alarmierungsgeräten für Wechselrichteranlagen zu 
23
+| verwenden, welche die entsprechenden Standardlösungen 
24
+| des Lieferers konkurrenzieren. Erlaubt ist dagegen die 
25
+| Verwendung für die Herstellung von derartigen Geräten 
26
+| für den eigenen Gebrauch oder im Rahmen von massge-
27
+| schneiderten Datenkommunikations-System-Einzellösungen 
28
+| für bestimmte Kunden. Im Zweifelsfall ist Sputnik 
29
+| anzufragen.
30
+
31
+Kontaktdaten des Herstellers:
32
+  Sputnik Engineering AG
33
+  CH-Biel
34
+  www.solarmax.com
35
+
36
+
37
+
38
+Die hier vorliegende Python-Bibliothek basiert jedoch nicht auf dieser
39
+Schnittstellenbeschreibung und unterliegt daher nicht dieser Einschränkung.
0 40
new file mode 100755
... ...
@@ -0,0 +1,107 @@
1
+#!/usr/bin/python
2
+# -* coding: utf-8 *-
3
+
4
+# This program is free software: you can redistribute it and/or modify
5
+# it under the terms of the GNU General Public License as published by
6
+# the Free Software Foundation, either version 3 of the License, or
7
+# (at your option) any later version.
8
+# This program is distributed in the hope that it will be useful,
9
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
+# GNU General Public License for more details.
12
+
13
+# You should have received a copy of the GNU General Public License
14
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
15
+
16
+# Developed 2009-2010 by Bernd Wurst <bernd@schokokeks.org> 
17
+# for own use.
18
+# Released to the public in 2012.
19
+
20
+
21
+import time, sys, os
22
+from solarmax import SolarMax
23
+
24
+from sqlite3 import dbapi2 as sqlite
25
+DB_FILE=sys.argv[1]
26
+
27
+inverters = { '192.168.0.201': [1,],
28
+              '192.168.0.202': [2,],
29
+              '192.168.0.203': [3,],
30
+              '192.168.0.204': [4,],
31
+            }
32
+
33
+
34
+smlist = []
35
+for host in inverters.keys():
36
+  sm = SolarMax(host, 12345)
37
+  sm.use_inverters(inverters[host])
38
+  smlist.append(sm)
39
+
40
+
41
+allinverters = []
42
+for host in inverters.keys():
43
+  allinverters.extend(inverters[host])
44
+
45
+dbconn = sqlite.connect(DB_FILE)
46
+db = dbconn.cursor()
47
+
48
+while True:
49
+  pac_gesamt = 0.0
50
+  daysum_gesamt = 0.0
51
+
52
+  count = 0
53
+  for sm in smlist:
54
+    for (no, ivdata) in sm.inverters().iteritems():
55
+      try:
56
+        (inverter, current) = sm.query(no, ['PAC', 'KDY', 'KT0', 'IDC', 'UDC', 'IL1', 'UL1', 'FDAT', 'SYS'])
57
+        count += 1
58
+      except:
59
+        # Kommunikationsfehler, evtl. Wechselrichter aus
60
+        print 'Kommunikationsfehler, WR %i' % no
61
+        continue
62
+    
63
+      ivmax = ivdata['installed']
64
+      ivname = ivdata['desc']
65
+      PAC = current['IL1'] * current['UL1']
66
+      percent = int((PAC/ivmax) * 100)
67
+      PDC = current['IDC'] * current['UDC']
68
+      (status, errors) = sm.status(no)
69
+      if errors:
70
+        print 'WR %i: %s (%s)' % (no, status, errors)
71
+      
72
+
73
+      #print '''
74
+      #WR %i (%s)
75
+        #Status: %s
76
+        #Aktuell: %9.1f Watt / errechnet: %8.1f W (%i %% von %i Watt)
77
+        #P_DC:    %9.1f Watt (Wirkungsgrad: %i %%)
78
+        #Gesamt heute:   %8.1f   kWh
79
+        #Gesamt bisher:  %8.1f   kWh (seit %s)
80
+      #''' % (inverter, ivname, status, current['PAC'], PAC, percent, ivmax, PDC, int((float(PAC)/PDC) * 100), current['KDY'], current['KT0'], current['FDAT'].date())
81
+      try:
82
+        # Könnte gelocked sein
83
+        # System ist 2 in diesem Fall. Fix.
84
+        db.execute('''INSERT INTO performance (time, inverter, system, pac, daysum, total) VALUES (strftime('%%s','now'), %i, 2, %i, %i, %i)'''
85
+                  % (inverter, int(current['PAC']), int(current['KDY']*1000), int(current['KT0']*1000)))
86
+      except:
87
+        pass
88
+      pac_gesamt += current['PAC']
89
+      daysum_gesamt += current['KDY']
90
+  try:
91
+    dbconn.commit()
92
+  except:
93
+    pass
94
+  if count < len(allinverters):
95
+    print 'Zu wenig Wechselrichter (%i < %i)' % (count, len(allinverters))
96
+
97
+  #print '='*80
98
+  #print 'GESAMT:  %9.2f Watt    / Heute: %8.1f kWh' % (pac_gesamt, daysum_gesamt)
99
+  time.sleep(10)
100
+
101
+
102
+
103
+
104
+
105
+
106
+
107
+
0 108
new file mode 100644
... ...
@@ -0,0 +1,366 @@
1
+#!/usr/bin/python
2
+# -* coding: utf-8 *-
3
+
4
+# This program is free software: you can redistribute it and/or modify
5
+# it under the terms of the GNU General Public License as published by
6
+# the Free Software Foundation, either version 3 of the License, or
7
+# (at your option) any later version.
8
+# This program is distributed in the hope that it will be useful,
9
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
+# GNU General Public License for more details.
12
+
13
+# You should have received a copy of the GNU General Public License
14
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
15
+
16
+# Developed 2009-2010 by Bernd Wurst <bernd@schokokeks.org> 
17
+# for own use.
18
+# Released to the public in 2012.
19
+
20
+
21
+import socket, datetime
22
+
23
+
24
+# Konstanten
25
+inverter_types = {
26
+      20010: { 'desc': 'SolarMax 2000S', 'max': 2000, }, # Nur geraten
27
+      20020: { 'desc': 'SolarMax 3000S', 'max': 3000, },
28
+      20030: { 'desc': 'SolarMax 4200S', 'max': 4200, },
29
+      20040: { 'desc': 'SolarMax 6000S', 'max': 6000, },
30
+    }
31
+
32
+
33
+query_types = ['KDY', 'KYR', 'KMT', 'KT0', 'IL1', 'IDC', 'PAC', 'PRL',
34
+               'SYS', 'SAL', 'TNF', 'PAC', 'PRL', 'TKK', 'UL1', 'UDC',
35
+               'ADR', 'TYP', 'PIN', 'MAC', 'CAC', 'KHR', 'EC00', 'EC01',
36
+               'EC02', 'EC03', 'EC04', 'EC05', 'EC06', 'EC07', 'EC08',
37
+               'BDN', 'SWV', 'DIN', 'LAN', 'SDAT', 'FDAT']
38
+
39
+
40
+status_codes = {
41
+      20000: 'Keine Kommunikation',
42
+      20001: 'In Betrieb',
43
+      20002: 'Zu wenig Einstrahlung',
44
+      20003: 'Anfahren',
45
+      20004: 'Betrieb auf MPP',
46
+      20005: 'Ventilator läuft',
47
+      20006: 'Betrieb auf Maximalleistung',
48
+      20007: 'Temperaturbegrenzung',
49
+      20008: 'Netzbetrieb',
50
+    }
51
+
52
+
53
+alarm_codes = {
54
+          0: 'kein Fehler',
55
+          1: 'Externer Fehler 1',
56
+          2: 'Isolationsfehler DC-Seite',
57
+          4: 'Fehlerstrom Erde zu Groß',
58
+          8: 'Sicherungsbruch Mittelpunkterde',
59
+         16: 'Externer Alarm 2',
60
+         32: 'Langzeit-Temperaturbegrenzung',
61
+         64: 'Fehler AC-Einspeisung',
62
+        128: 'Externer Alarm 4',
63
+        256: 'Ventilator defekt',
64
+        512: 'Sicherungsbruch',
65
+       1024: 'Ausfall Temperatursensor',
66
+       2048: 'Alarm 12',
67
+       4096: 'Alarm 13',
68
+       8192: 'Alarm 14',
69
+      16384: 'Alarm 15',
70
+      32768: 'Alarm 16',
71
+      65536: 'Alarm 17',
72
+  }
73
+
74
+
75
+
76
+# Hilfs-Routine (DEBUG)
77
+
78
+def DEBUG(*s):
79
+  out = [datetime.datetime.now().isoformat()+':',] + [str(x) for x in s]
80
+  print(' '.join(out))
81
+
82
+
83
+
84
+####################################
85
+## Haupt-Klasse
86
+####################################
87
+
88
+
89
+class SolarMax ( object ):
90
+  def __init__(self, host, port):
91
+    self.__host = host
92
+    self.__port = port
93
+    self.__inverters = {}
94
+    self.__socket = None
95
+    self.__connected = False
96
+    self.__allinverters = False
97
+    self.__inverter_list = []
98
+    self.__connect()
99
+
100
+  def __repr__(self):
101
+    return 'SolarMax[%s:%s / socket=%s]' % (self.__host, self.__port, self.__socket)
102
+
103
+  def __str__(self):
104
+    return 'SolarMax[%s:%s / socket=%s / inverters=%s]' % (self.__host, self.__port, self.__socket, self.inverters())
105
+
106
+  def __disconnect(self):
107
+    try:
108
+      DEBUG('Closing open connection to %s:%s' % (self.__host, self.__port))
109
+      self.__socket.shutdown(socket.SHUT_RDWR)
110
+      self.__socket.close()
111
+      del self.__socket
112
+    except:
113
+      pass
114
+    finally:
115
+      self.__connected = False
116
+      self.__allinverters = False
117
+      self.__socket = None
118
+
119
+  def __del__(self):
120
+    DEBUG('destructor called')
121
+    self.__disconnect()
122
+
123
+  def __connect(self):
124
+    self.__disconnect()
125
+    DEBUG('establishing connection to %s:%i...' % (self.__host, self.__port))
126
+    try:
127
+      # Python 2.5
128
+      self.__socket = socket.socket()
129
+      s = self.__socket
130
+      s.settimeout(2)
131
+      s.connect((self.__host, self.__port))
132
+      s.settimeout(10)
133
+      self.__connected = True
134
+      DEBUG('connected.')
135
+    except:
136
+      DEBUG('connection to %s:%i failed' % (self.__host, self.__port))
137
+      self.__connected = False
138
+      self.__allinverters = False
139
+
140
+    # Python 2.6
141
+    ## Socket-timeout: 5 secs
142
+    #self.__socket = socket.create_connection((self.__host, self.__port), 5)
143
+
144
+
145
+  # Utility-functions
146
+  def hexval(self, i):
147
+    return (hex(i)[2:]).upper()
148
+
149
+
150
+  def checksum(self, s):
151
+    total = 0
152
+    for c in s:
153
+      total += ord(c)
154
+    h = self.hexval(total)
155
+    while len(h) < 4:
156
+      h = '0'+h
157
+    return h
158
+
159
+
160
+  def __receive(self):
161
+    try:
162
+      data = ''
163
+      tmp = ''
164
+      while True:
165
+         tmp = self.__socket.recv(1)
166
+         data += tmp
167
+         if len(tmp) < 1 or tmp == '}':
168
+           break
169
+         tmp = ''
170
+      return data
171
+    except:
172
+      self.__allinverters = False
173
+      return ""
174
+
175
+
176
+  def __parse(self, answer):
177
+    # convenience checks
178
+    if answer[0] != '{' or answer[-1] != '}':
179
+      raise ValueError('malformed answer: %s' % answer)
180
+    raw_answer = answer
181
+    answer = answer[1:-1]
182
+    checksum = answer[-4:]
183
+    content = answer[:-4]
184
+    # checksum
185
+    if checksum != self.checksum(content):
186
+      raise ValueError('checksum error')
187
+
188
+    (header, content) = content[:-1].split('|', 2)
189
+    (inverter, fb, length) = header.split(';', 3)
190
+    if fb != 'FB':
191
+      raise ValueError('answer not understood')
192
+    # length
193
+    length = int(length, 16)
194
+    if length != len(raw_answer):
195
+      raise ValueError('length mismatch')
196
+
197
+    inverter = int(inverter)
198
+
199
+    # Bei schreibzugriff antwortet der WR mit 'C8'
200
+    #if not content.startswith('64:'):
201
+    #  raise ValueError('Inverter did not understand our query')
202
+
203
+    content = content[3:]
204
+    data = {}
205
+    
206
+    for item in content.split(';'):
207
+      (key, value) = item.split('=')
208
+      if key not in query_types:
209
+        raise NotImplementedError("Don't know %s" % item)
210
+      data[key] = value
211
+    return (inverter, data)
212
+
213
+
214
+
215
+
216
+  def __build_query(self, id, values, qtype=100):
217
+    qtype = self.hexval(qtype)
218
+    if type(values) == list:
219
+      for v in values:
220
+        if v not in query_types:
221
+          raise ValueError('Unknown data type »'+v+'«')
222
+      values = ';'.join(values)
223
+    elif type(values) in [str, unicode]:
224
+      pass
225
+    else:
226
+      raise ValueError('value has unsupported type')
227
+
228
+    querystring = '|' + qtype + ':' + values + '|'
229
+    # Länge vergrößern um: 2 x { (2), WR-Nummer (2), "FB" (2), zwei Semikolon (2), Länge selbst (2), checksumme (4)
230
+    l = len(querystring) + 2 + 2 + 2 + 2 +2 + 4
231
+    querystring = 'FB;%02i;%s%s' % (int(id), self.hexval(l), querystring)
232
+    querystring += self.checksum(querystring)
233
+    return '{%s}' % querystring
234
+
235
+
236
+  def __send_query(self, querystring):
237
+    try:
238
+      DEBUG(self.__host, '=>', querystring)
239
+      self.__socket.send(querystring)
240
+    except socket.timeout:
241
+      self.__allinverters = False
242
+    except socket.error:
243
+      self.__connected = False
244
+
245
+
246
+
247
+  def query(self, id, values, qtype=100):
248
+    q = self.__build_query(id, values, qtype)
249
+    #DEBUG("WR %i: %s" % (id, q))
250
+    self.__send_query(q)
251
+    answer = self.__receive()
252
+    if answer:
253
+      (inverter, data) = self.__parse(answer)
254
+      for d in data.keys():
255
+        data[d] = self.normalize_value(d, data[d])
256
+      return (inverter, data)
257
+    else:
258
+      self.__allinverters = False
259
+
260
+    if not self.__allinverters and not self.__detection_running:
261
+      self.detect_inverters()
262
+    elif not self.__connected:
263
+      self.__connect()
264
+    else:
265
+      raise socket.timeout
266
+    return None
267
+      
268
+
269
+
270
+  def normalize_value(self, key, value):
271
+    if key in [ 'KDY', 'UL1', 'UDC']:
272
+      return float(int(value, 16)) / 10
273
+    elif key in [ 'IL1', 'IDC', 'TNF', ]:
274
+      return float(int(value, 16)) / 100
275
+    elif key in [ 'PAC', 'PIN', ]:
276
+      return float(int(value, 16)) / 2
277
+    elif key in [ 'SAL', ]:
278
+      return int(value, 16)
279
+    elif key in [ 'SYS', ]:
280
+      (x,y) = value.split(',',2)
281
+      x = int(x, 16)
282
+      y = int(y, 16)
283
+      return (x,y)
284
+    elif key in [ 'SDAT', 'FDAT' ]:
285
+      (date, time) = value.split(',',2)
286
+      time = int(time, 16)
287
+      return datetime.datetime(int(date[:3], 16), int(date[3:5], 16), int(date[5:], 16), time/3600, (time % 3600) / 60, time % (3600*60))
288
+    else:
289
+      return int(value, 16)
290
+
291
+
292
+  def write_setting(self, inverter, data):
293
+    rawdata = []
294
+    for key,value in data.iteritems():
295
+      key = key.upper()
296
+      if key not in query_types:
297
+        raise ValueError('unknown type')
298
+      value = self.hexval(value)
299
+      rawdata.append('%s=%s' % (key, value))
300
+    DEBUG(self.query(inverter, ';'.join(rawdata), 200))
301
+
302
+
303
+  def status(self, inverter):
304
+    result = self.query(inverter, ['SYS', 'SAL'])
305
+    if not result:
306
+      return ('Offline', 'Offline')
307
+    result = result[1]
308
+    errors = []
309
+    if result['SAL'] > 0:
310
+      for (code, descr) in alarm_codes.iteritems():
311
+        if code & result['SAL']:
312
+          errors.append(descr)
313
+
314
+    status = status_codes[result['SYS'][0]]
315
+    return (status, ', '.join(errors))
316
+
317
+
318
+  def use_inverters(self, list_of):
319
+    self.__inverter_list = list_of
320
+    self.detect_inverters()
321
+
322
+
323
+  def detect_inverters(self):
324
+    self.__inverters = {}
325
+    if not self.__connected:
326
+      self.__connect()
327
+    self.__detection_running = True
328
+    for inverter in self.__inverter_list:
329
+      try:
330
+        DEBUG('searching for #%i (socket: %s)' % (inverter, self.__socket))
331
+        (inverter, data) = self.query(inverter, [ 'ADR', 'TYP', 'PIN' ])
332
+        if data['TYP'] in inverter_types.keys():
333
+          self.__inverters[inverter] = inverter_types[data['TYP']].copy()
334
+          self.__inverters[inverter]['installed'] = data['PIN']
335
+        else:
336
+          DEBUG('Unknown inverter type: %s (ID #%i)' % (data['TYP'], data['ADR']))
337
+      except:
338
+        DEBUG('Inverter #%i not found' % inverter)
339
+        self.__allinverters = False
340
+    self.__detection_running = False
341
+    if len(self.__inverters) == len(self.__inverter_list):
342
+      self.__allinverters = True
343
+      DEBUG('found all inverters:')
344
+      DEBUG(self.__inverters)
345
+    else:
346
+      DEBUG('not all invertes found, reconnection!')
347
+      self.__connect()
348
+      
349
+
350
+  def inverters(self):
351
+    if not self.__allinverters:
352
+      self.detect_inverters()
353
+    return self.__inverters
354
+
355
+  
356
+
357
+
358
+
359
+
360
+
361
+
362
+
363
+
364
+
365
+
366
+