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__init__.py
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__init__.py
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#! /usr/bin/python
# -*- coding: utf-8 -*-
"""
Copyright (C) 2013 Anders Nylund
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 3 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, see <http://www.gnu.org/licenses/>.
"""
from Pellmonsrv.plugin_categories import protocols
from Pellmonsrv.database import Getsetitem, Storeditem
from logging import getLogger
from threading import Timer
from time import sleep, time
import xml.etree.ElementTree as et
import requests
import ctypes, os
logger = getLogger('pellMon')
CLOCK_MONOTONIC_RAW = 4 # see <linux/time.h>
class timespec(ctypes.Structure):
_fields_ = [
('tv_sec', ctypes.c_long),
('tv_nsec', ctypes.c_long)
]
librt = ctypes.CDLL('librt.so.1', use_errno=True)
clock_gettime = librt.clock_gettime
clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
def monotonic_time():
t = timespec()
if clock_gettime(CLOCK_MONOTONIC_RAW , ctypes.pointer(t)) != 0:
errno_ = ctypes.get_errno()
raise OSError(errno_, os.strerror(errno_))
return t.tv_sec + t.tv_nsec * 1e-9
class mgmplugin(protocols):
def __init__(self):
protocols.__init__(self)
def activate(self, conf, glob, db, *args, **kwargs):
protocols.activate(self, conf, glob, db, *args, **kwargs)
self.itemrefs = []
self.storeditems = {}
self.itemvalues = {}
self.feeder_time = 0
self.errorcounter = 0
def additem(i, item_type='R'):
i.tags = ['All', 'Basic', 'MGM']
i.type = item_type
i.min = ''
i.max = ''
self.db.insert(i)
self.itemrefs.append(i)
i = Storeditem('mgm_ip', '0.0.0.0')
i.label = 'MGM IP'
i.longname = 'MGM IP'
i.description = 'The IP that the MGM controller is reachable on'
additem(i, 'R/W')
config = {}
for index_key, value in self.conf.items():
if '_' in index_key:
index, key = index_key.rsplit('_', 1)
try:
config[index][key] = value
except KeyError:
config[index] = {key:value}
# Get all enumerations
enumerations = {}
for enum_id, enum in config.items():
enum_id = enum_id.split('_')
try:
if enum_id[1] == 'enum':
enumerations[enum_id[0]] = enum
except IndexError:
pass
# Get all item definitions
for index, itemconf in config.items():
try:
itemname = itemconf.pop('item')
itemvalue = itemconf.pop('default', '0')
try:
itemdata = itemconf.pop('data');
try:
scalefactor = itemconf.pop('scalefactor', '1')
scalefactor = float(scalefactor)
except ValueError:
logger.info('MGM plugin: invalid scaling factor %s'%scalefactor)
try:
bitmask = itemconf.pop('bitmask', None)
if bitmask:
bitmask = int(bitmask)
scalefactor = 0
except ValueError:
bitmask = 0
logger.info('MGM plugin: invalid bitmask %s'%bitmask)
itemenumeration = itemconf.pop('enumeration', None)
if itemenumeration:
enum = enumerations[itemenumeration]
if bitmask:
getfunc = lambda item,d=itemdata,e=enum,m=bitmask: e[str(int(self.itemvalues[d]) & m)]
else:
getfunc = lambda item,d=itemdata,e=enum: e[self.itemvalues[d]]
elif scalefactor == 1:
getfunc = lambda item,d=itemdata:self.itemvalues[d]
elif bitmask:
getfunc = lambda item, d=itemdata,s=scalefactor,m=bitmask:str(int(self.itemvalues[d]) & m)
else:
getfunc = lambda item, d=itemdata,s=scalefactor:str(float(self.itemvalues[d])*s)
i = Getsetitem(itemname, itemvalue, getter=getfunc)
additem(i)
i.tags = itemconf.pop('tags').split( )
for key, value in itemconf.items():
setattr(i, key, value)
self.itemvalues[itemname]=itemvalue
except KeyError:
try:
command = itemconf.pop('command')
parameter = itemconf.pop('parameter')
if command == 'boilercmd':
i = Getsetitem(itemname, itemvalue, setter=lambda item, value, p=parameter:self.boiler_cmd(p))
additem(i, 'W')
i.tags = itemconf.pop('tags').split()
for key, value in itemconf.items():
setattr(i, key, value)
except KeyError:
pass
except KeyError:
pass
i = Storeditem('feeder_capacity', '1500')
additem(i, 'R/W')
i.tags = ['All', 'MGM']
i = Storeditem('efficiency', '90')
i.longname = 'Efficiency'
i.unit = '%'
i.description = 'Efficiency used in burner power calculation. Used for pellet consumption calculation.'
additem(i, 'R/W')
i.tags = ['All', 'MGM']
i = Getsetitem('feeder_time', '0', getter=lambda item:str(int(self.feeder_time)))
additem(i, 'R')
i.tags = ['All', 'MGM']
self.state = 'OK'
i = Getsetitem('alarm', '0', getter=lambda item:self.state)
additem(i, 'R')
self.update_interval = 0.1
t = Timer(0, self.update_thread)
t.setDaemon(True)
t.start()
def boiler_cmd(self, param):
try:
boilercmd_url = 'http://' + self.db['mgm_ip'].value + self.conf['boilercmd']
response = requests.get(boilercmd_url +'?'+ param, timeout=5)
except:
logger.info('boiler command failed, "boilercmd" missing from conf?')
def update_thread(self):
last_update = None
self.feeder_time = 0
if self.errorcounter > 100:
self.errorcounter = 0
oldmode = None
while True:
try:
status_url = 'http://' + self.db['mgm_ip'].value + self.conf['status']
except:
time.sleep(10)
continue
sleep(self.update_interval)
try:
response = requests.get(status_url, timeout=8)
if response.status_code == requests.codes.ok:
now = monotonic_time()
if last_update:
time_diff = now - last_update
feeder_capacity = float(self.db['feeder_capacity'].value) / 360
power = float(self.itemvalues['RATED_POWER'])/10
proc_id = self.itemvalues['PROC_ID']
try:
efficiency = float(self.db['efficiency'].value) / 100
except ValueError:
efficiency = 1
if proc_id == '5':
self.feeder_time += (power / 4.8 / 3600) * 1000 * time_diff / feeder_capacity / efficiency
last_update = now
root = et.fromstring(response.text)
if self.state == 'Disconnected':
logger.info('The burner is connected!')
self.state = 'OK'
for element in root:
text = unicode(element.text)
if 'PROC_ID' in self.itemvalues and self.itemvalues['PROC_ID'] != '5' and element.tag == 'RATED_POWER':
text = u'0'
self.itemvalues[element.tag] = text
if not oldmode:
oldmode = self.db['mode'].value
try:
if oldmode != self.db['mode'].value:
logger.info('Mode went from %s to %s'%(oldmode, self.db['mode'].value))
oldmode = self.db['mode'].value
except Exception as e:
pass
else:
response.raise_for_status()
except Exception as e:
print time(), str(e)
if self.update_interval < 60:
self.update_interval = self.update_interval * 2
else:
if self.errorcounter == 0:
self.state = 'Disconnected'
logger.info('The burner is disconnected')
self.errorcounter +=1
else:
self.update_interval = 5
self.errorcounter = 0