95 lines
3.4 KiB
Python
95 lines
3.4 KiB
Python
#!/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 logging
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import sys
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import os
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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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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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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/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('/ProductName', productname)
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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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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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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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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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if __name__ == "__main__":
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main() |