Update temperature script
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46c8478c12
commit
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1 changed files with 130 additions and 64 deletions
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@ -1,95 +1,161 @@
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#!/usr/bin/env python
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try:
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import gobject # Python 2.x
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except:
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from gi.repository import GLib as gobject # Python 3.x
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import platform
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# import normal packages
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import platform
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import logging
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import sys
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import os
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import sys
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if sys.version_info.major == 2:
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import gobject
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else:
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from gi.repository import GLib as gobject
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import sys
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import time
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import requests # for http GET
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try:
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import thread # for daemon = True / Python 2.x
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except:
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import _thread as thread # for daemon = True / Python 3.x
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# our own packages
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sys.path.insert(1, os.path.join(os.path.dirname(__file__), '../ext/velib_python'))
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# our own packages from victron
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sys.path.insert(1, os.path.join(os.path.dirname(__file__), '/opt/victronenergy/dbus-systemcalc-py/ext/velib_python'))
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from vedbus import VeDbusService
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path_UpdateIndex = '/UpdateIndex'
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class NodeRedTempOutside:
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def __init__(self, servicename, deviceinstance, paths, productname='External temp sensor', connection='NodeRED local'):
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self._dbusservice = VeDbusService(servicename)
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class NodeRedMeterTemperature:
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def __init__(self, servicename, deviceinstance, paths, productname='External temp sensor', connection='Node RED HTTP JSON service'):
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self._dbusservice = VeDbusService("{}.http_{:02d}".format(servicename, deviceinstance))
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self._paths = paths
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logging.debug("%s /DeviceInstance = %d" % (servicename, deviceinstance))
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# Create the management objects, as specified in the ccgx dbus-api document
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self._dbusservice.add_path('/Mgmt/ProcessName', __file__)
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self._dbusservice.add_path('/Mgmt/ProcessVersion', 'Python ' + platform.python_version())
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self._dbusservice.add_path('/Mgmt/Connection', connection)
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# Create the mandatory objects
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self._dbusservice.add_path('/DeviceInstance', deviceinstance)
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self._dbusservice.add_path('/ProductId', 0xFFFF) # like ruvii sensors, for symbol only
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self._dbusservice.add_path('/ProductId', 41314)
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self._dbusservice.add_path('/FilterLength', 10)
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self._dbusservice.add_path('/Offset', 0)
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self._dbusservice.add_path('/Scale', 1)
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self._dbusservice.add_path('/ProductName', productname)
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self._dbusservice.add_path('/CustomName', "Temperatur Außen")
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self._dbusservice.add_path('/TemperatureType', 2) # 0=battery; 1=fridge; 2=generic
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self._dbusservice.add_path('/FirmwareVersion', 1.0)
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self._dbusservice.add_path('/HardwareVersion', 0)
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self._dbusservice.add_path('/Connected', 1)
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self._dbusservice.add_path('/Serial', 1337)
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self._dbusservice.add_path('/UpdateIndex', 0)
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# add path values to dbus
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for path, settings in self._paths.items():
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self._dbusservice.add_path(
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path, settings['initial'], writeable=True, onchangecallback=self._handlechangedvalue)
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path, settings['initial'], gettextcallback=settings['textformat'], writeable=True, onchangecallback=self._handlechangedvalue)
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# last update
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self._lastUpdate = 0
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# add _update function 'timer'
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gobject.timeout_add(2000, self._update) # pause 2000ms before the next request
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def _update(self):
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try:
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nodered_url = "http://localhost:1880/temps"
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nodered_r = requests.get(url=nodered_url) # request data from Node RED HTTP JSON API
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nodered_data = nodered_r.json() # convert JSON data
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nodered_temperature = nodered_data['outside']
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self._dbusservice['/Temperature'] = float(nodered_temperature)
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self._dbusservice['/TemperatureType'] = 2 # 0=battery; 1=fridge; 2=generic
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self._dbusservice['/CustomName'] = "Temperatur Außen"
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logging.info("Temperature reading: {:.0f}".format(nodered_temperature))
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except:
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logging.info("WARNING: Could not read from Node Red, check if Node Red service is running")
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index = self._dbusservice[path_UpdateIndex] + 1 # increment index
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if index > 255: # maximum value of the index
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index = 0 # overflow from 255 to 0
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self._dbusservice[path_UpdateIndex] = index
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# add _signOfLife 'timer' to get feedback in log every 5minutes
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gobject.timeout_add(self._getSignOfLifeInterval()*60*1000, self._signOfLife)
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def _getSignOfLifeInterval(self):
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value = 1
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if not value:
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value = 0
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return int(value)
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def _getNodeRedData(self):
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URL = "http://localhost:1880/temps"
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temperature_r = requests.get(url = URL)
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# check for response
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if not temperature_r:
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raise ConnectionError("No response from NodeRed - %s" % (URL))
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meter_data = temperature_r.json()
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# check for Json
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if not meter_data:
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raise ValueError("Converting response to JSON failed")
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return meter_data
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def _signOfLife(self):
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logging.info("--- Start: sign of life ---")
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logging.info("Last _update() call: %s" % (self._lastUpdate))
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logging.info("Last '/Temperature': %s" % (self._dbusservice['/Temperature']))
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logging.info("--- End: sign of life ---")
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return True
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def _update(self):
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try:
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#get data from NodeRed 3em
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meter_data = self._getNodeRedData()
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#send data to DBus
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self._dbusservice['/Temperature'] = meter_data['outside']
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#logging
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logging.debug("Temperature Outside (/Temperature): %s" % (self._dbusservice['/Temperature']))
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logging.debug("---");
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# increment UpdateIndex - to show that new data is available
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index = self._dbusservice['/UpdateIndex'] + 1 # increment index
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if index > 255: # maximum value of the index
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index = 0 # overflow from 255 to 0
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self._dbusservice['/UpdateIndex'] = index
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#update lastupdate vars
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self._lastUpdate = time.time()
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except Exception as e:
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logging.critical('Error at %s', '_update', exc_info=e)
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# return true, otherwise add_timeout will be removed from GObject - see docs http://library.isr.ist.utl.pt/docs/pygtk2reference/gobject-functions.html#function-gobject--timeout-add
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return True
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def _handlechangedvalue(self, path, value):
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logging.debug("someone else updated %s to %s" % (path, value))
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return True # accept the change
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def main():
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logging.basicConfig(level=logging.DEBUG) # use .INFO for less logging
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thread.daemon = True # allow the program to quit
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from dbus.mainloop.glib import DBusGMainLoop
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# Have a mainloop, so we can send/receive asynchronous calls to and from dbus
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DBusGMainLoop(set_as_default=True)
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pvac_output = NodeRedTempOutside(
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servicename='com.victronenergy.temperature',
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deviceinstance=28,
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paths={
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'/Temperature': {'initial': 0},
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'/TemperatureType': {'initial': 0},
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'/CustomName': {'initial': 0},
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path_UpdateIndex: {'initial': 0},
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})
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logging.info('Connected to dbus, and switching over to gobject.MainLoop() (= event based)')
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mainloop = gobject.MainLoop()
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mainloop.run()
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#configure logging
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logging.basicConfig( format='%(asctime)s,%(msecs)d %(name)s %(levelname)s %(message)s',
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datefmt='%Y-%m-%d %H:%M:%S',
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level=logging.INFO,
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handlers=[
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logging.FileHandler("%s/current.log" % (os.path.dirname(os.path.realpath(__file__)))),
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logging.StreamHandler()
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])
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try:
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logging.info("Start");
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from dbus.mainloop.glib import DBusGMainLoop
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# Have a mainloop, so we can send/receive asynchronous calls to and from dbus
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DBusGMainLoop(set_as_default=True)
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#formatting
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_celcius = lambda p, v: (str(round(v, 2)) + ' °C')
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#start our main-service
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pvac_output = NodeRedMeterTemperature(
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servicename='com.victronenergy.temperature',
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deviceinstance=18,
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paths={
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'/Temperature': {'initial': 0, 'textformat': _celcius},
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})
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logging.info('Connected to dbus, and switching over to gobject.MainLoop() (= event based)')
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mainloop = gobject.MainLoop()
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mainloop.run()
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except Exception as e:
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logging.critical('Error at %s', 'main', exc_info=e)
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if __name__ == "__main__":
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main()
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