#!/usr/bin/env python try: import gobject # Python 2.x except: from gi.repository import GLib as gobject # Python 3.x import platform import logging import sys import os import requests # for http GET try: import thread # for daemon = True / Python 2.x except: import _thread as thread # for daemon = True / Python 3.x # our own packages sys.path.insert(1, os.path.join(os.path.dirname(__file__), '../ext/velib_python')) from vedbus import VeDbusService path_UpdateIndex = '/UpdateIndex' class NodeRedMeterEinspeisung: def __init__(self, servicename, deviceinstance, paths, productname='Einspeisung', connection='NodeRED local'): self._dbusservice = VeDbusService(servicename) self._paths = paths logging.debug("%s /DeviceInstance = %d" % (servicename, deviceinstance)) # Create the management objects, as specified in the ccgx dbus-api document self._dbusservice.add_path('/Mgmt/ProcessName', __file__) self._dbusservice.add_path('/Mgmt/Connection', connection) # Create the mandatory objects self._dbusservice.add_path('/DeviceInstance', deviceinstance) self._dbusservice.add_path('/ProductId', 0xB017) # like a EM24 self._dbusservice.add_path('/DeviceType', 72) # like a EM24 self._dbusservice.add_path('/ProductName', productname) self._dbusservice.add_path('/FirmwareVersion', 1.0) self._dbusservice.add_path('/HardwareVersion', 0) self._dbusservice.add_path('/Connected', 1) for path, settings in self._paths.items(): self._dbusservice.add_path( path, settings['initial'], writeable=True, onchangecallback=self._handlechangedvalue) gobject.timeout_add(1000, self._update) # pause 1000ms before the next request def _update(self): try: self._dbusservice['/ErrorCode'] = 0 nodered_url = "http://localhost:1880/meters" nodered_r = requests.get(url=nodered_url) # request data from the Fronius PV inverter nodered_data = nodered_r.json() # convert JSON data self._dbusservice['/Ac/Power'] = nodered_data['einspeisung']['total_power'] self._dbusservice['/Ac/Current'] = nodered_data['einspeisung']['total_current'] self._dbusservice['/Ac/Energy/Forward'] = nodered_data['einspeisung']['total_import'] self._dbusservice['/Ac/Energy/Reverse'] = nodered_data['einspeisung']['total_export'] self._dbusservice['/Ac/L1/Voltage'] = nodered_data['einspeisung']['l1_voltage'] self._dbusservice['/Ac/L2/Voltage'] = nodered_data['einspeisung']['l2_voltage'] self._dbusservice['/Ac/L3/Voltage'] = nodered_data['einspeisung']['l3_voltage'] self._dbusservice['/Ac/L1/Current'] = nodered_data['einspeisung']['l1_current'] self._dbusservice['/Ac/L2/Current'] = nodered_data['einspeisung']['l2_current'] self._dbusservice['/Ac/L3/Current'] = nodered_data['einspeisung']['l3_current'] self._dbusservice['/Ac/L1/Power'] = nodered_data['einspeisung']['l1_power'] self._dbusservice['/Ac/L2/Power'] = nodered_data['einspeisung']['l2_power'] self._dbusservice['/Ac/L3/Power'] = nodered_data['einspeisung']['l3_power'] self._dbusservice['/Ac/L1/Energy/Forward'] = nodered_data['einspeisung']['l1_import'] self._dbusservice['/Ac/L2/Energy/Forward'] = nodered_data['einspeisung']['l2_import'] self._dbusservice['/Ac/L3/Energy/Forward'] = nodered_data['einspeisung']['l3_import'] self._dbusservice['/Ac/L1/Energy/Reverse'] = nodered_data['einspeisung']['l1_export'] self._dbusservice['/Ac/L2/Energy/Reverse'] = nodered_data['einspeisung']['l2_export'] self._dbusservice['/Ac/L3/Energy/Reverse'] = nodered_data['einspeisung']['l3_export'] logging.debug("House Consumption (/Ac/Power): %s" % (self._dbusservice['/Ac/Power'])) logging.debug("House Forward (/Ac/Energy/Forward): %s" % (self._dbusservice['/Ac/Energy/Forward'])) logging.debug("House Reverse (/Ac/Energy/Revers): %s" % (self._dbusservice['/Ac/Energy/Reverse'])) logging.debug("---"); index = self._dbusservice[path_UpdateIndex] + 1 # increment index if index > 255: # maximum value of the index index = 0 # overflow from 255 to 0 self._dbusservice[path_UpdateIndex] = index except Exception as e: logging.critical("WARNING: Could not read from Node Red, check if Node Red service is running") logging.critical('Error at %s', '_update', exc_info=e) self._dbusservice['/ErrorCode'] = 1 self._dbusservice['/Ac/Power'] = 0 self._dbusservice['/Ac/Current'] = 0 self._dbusservice['/Ac/L1/Voltage'] = 0 self._dbusservice['/Ac/L2/Voltage'] = 0 self._dbusservice['/Ac/L3/Voltage'] = 0 self._dbusservice['/Ac/L1/Current'] = 0 self._dbusservice['/Ac/L2/Current'] = 0 self._dbusservice['/Ac/L3/Current'] = 0 self._dbusservice['/Ac/L1/Power'] = 0 self._dbusservice['/Ac/L2/Power'] = 0 self._dbusservice['/Ac/L3/Power'] = 0 return True def _handlechangedvalue(self, path, value): logging.debug("someone else updated %s to %s" % (path, value)) return True # accept the change def main(): logging.basicConfig( format='%(asctime)s,%(msecs)d %(name)s %(levelname)s %(message)s', datefmt='%Y-%m-%d %H:%M:%S', level=logging.ERROR, handlers=[ logging.FileHandler("%s/current.log" % (os.path.dirname(os.path.realpath(__file__)))), logging.StreamHandler() ]) thread.daemon = True # allow the program to quit try: from dbus.mainloop.glib import DBusGMainLoop # Have a mainloop, so we can send/receive asynchronous calls to and from dbus DBusGMainLoop(set_as_default=True) _kwh = lambda p, v: (str(round(v, 2)) + ' KWh') _A = lambda p, v: (str(round(v, 1)) + ' A') _W = lambda p, v: (str(round(v, 1)) + ' W') _V = lambda p, v: (str(round(v, 1)) + ' V') pvac_output = NodeRedMeterEinspeisung( servicename='com.victronenergy.grid', deviceinstance=40, paths={ '/ErrorCode': {'initial': 0}, '/Ac/Power': {'initial': 0, 'textformat': _W}, '/Ac/Current': {'initial': 0, 'textformat': _A}, '/Ac/L1/Voltage': {'initial': 0, 'textformat': _V}, '/Ac/L2/Voltage': {'initial': 0, 'textformat': _V}, '/Ac/L3/Voltage': {'initial': 0, 'textformat': _V}, '/Ac/L1/Current': {'initial': 0, 'textformat': _A}, '/Ac/L2/Current': {'initial': 0, 'textformat': _A}, '/Ac/L3/Current': {'initial': 0, 'textformat': _A}, '/Ac/L1/Power': {'initial': 0, 'textformat': _W}, '/Ac/L2/Power': {'initial': 0, 'textformat': _W}, '/Ac/L3/Power': {'initial': 0, 'textformat': _W}, '/Ac/Energy/Forward': {'initial': 0, 'textformat': _kwh}, '/Ac/Energy/Reverse': {'initial': 0, 'textformat': _kwh}, '/Ac/L1/Energy/Forward': {'initial': 0, 'textformat': _kwh}, '/Ac/L2/Energy/Forward': {'initial': 0, 'textformat': _kwh}, '/Ac/L3/Energy/Forward': {'initial': 0, 'textformat': _kwh}, '/Ac/L1/Energy/Reverse': {'initial': 0, 'textformat': _kwh}, '/Ac/L2/Energy/Reverse': {'initial': 0, 'textformat': _kwh}, '/Ac/L3/Energy/Reverse': {'initial': 0, 'textformat': _kwh}, path_UpdateIndex: {'initial': 0}, }) logging.info('Connected to dbus, and switching over to gobject.MainLoop() (= event based)') mainloop = gobject.MainLoop() mainloop.run() except Exception as e: logging.critical('Error at %s', 'main', exc_info=e) if __name__ == "__main__": main()