VictronGX_Custom_Sensors/dbus-node-red-meter-einspeisung/meter_einspeisung.py

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8.9 KiB
Python

#!/usr/bin/env python
# import normal packages
import platform
import logging
import sys
import os
import sys
if sys.version_info.major == 2:
import gobject
else:
from gi.repository import GLib as gobject
import sys
import time
import requests # for http GET
# our own packages from victron
sys.path.insert(1, os.path.join(os.path.dirname(__file__), '/opt/victronenergy/dbus-systemcalc-py/ext/velib_python'))
from vedbus import VeDbusService
class NodeRedMeterEinspeisung:
def __init__(self, servicename, deviceinstance, paths, productname='Einspeisung', connection='Node RED HTTP JSON service'):
self._dbusservice = VeDbusService("{}.http_{:02d}".format(servicename, deviceinstance))
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/ProcessVersion', 'Python ' + platform.python_version())
self._dbusservice.add_path('/Mgmt/Connection', connection)
# Create the mandatory objects
self._dbusservice.add_path('/DeviceInstance', deviceinstance)
self._dbusservice.add_path('/ProductId', 45069)
self._dbusservice.add_path('/DeviceType', 345)
self._dbusservice.add_path('/ProductName', productname)
self._dbusservice.add_path('/CustomName', productname)
self._dbusservice.add_path('/Latency', None)
self._dbusservice.add_path('/FirmwareVersion', 1.0)
self._dbusservice.add_path('/HardwareVersion', 0)
self._dbusservice.add_path('/Connected', 1)
self._dbusservice.add_path('/Role', 'grid')
self._dbusservice.add_path('/Position', 0)
self._dbusservice.add_path('/Serial', 12345678)
self._dbusservice.add_path('/UpdateIndex', 0)
# add path values to dbus
for path, settings in self._paths.items():
self._dbusservice.add_path(
path, settings['initial'], gettextcallback=settings['textformat'], writeable=True, onchangecallback=self._handlechangedvalue)
# last update
self._lastUpdate = 0
# add _update function 'timer'
gobject.timeout_add(500, self._update) # pause 500ms before the next request
# add _Status 'timer' to get feedback in log every 5minutes
gobject.timeout_add(self._getStatusInterval()*60*1000, self._Status)
def _getStatusInterval(self):
value = 1
if not value:
value = 0
return int(value)
def _getNodeRedData(self):
URL = "http://localhost:1880/meters"
meter_r = requests.get(url = URL)
# check for response
if not meter_r:
raise ConnectionError("No response from NodeRed - %s" % (URL))
meter_data = meter_r.json()
# check for Json
if not meter_data:
raise ValueError("Converting response to JSON failed")
return meter_data
def _Status(self):
logging.info("Last update: %s" % (self._lastUpdate))
logging.info("Last '/Ac/Power': %s" % (self._dbusservice['/Ac/Power']))
return True
def _update(self):
try:
#get data from NodeRed 3em
meter_data = self._getNodeRedData()
#send data to DBus
self._dbusservice['/Ac/Power'] = meter_data['einspeisung']['total_power'] # positive: consumption, negative: feed into grid
self._dbusservice['/Ac/Current'] = meter_data['einspeisung']['total_current']
self._dbusservice['/Ac/L1/Voltage'] = meter_data['einspeisung']['l1_voltage']
self._dbusservice['/Ac/L2/Voltage'] = meter_data['einspeisung']['l2_voltage']
self._dbusservice['/Ac/L3/Voltage'] = meter_data['einspeisung']['l3_voltage']
self._dbusservice['/Ac/L1/Current'] = meter_data['einspeisung']['l1_current']
self._dbusservice['/Ac/L2/Current'] = meter_data['einspeisung']['l2_current']
self._dbusservice['/Ac/L3/Current'] = meter_data['einspeisung']['l3_current']
self._dbusservice['/Ac/L1/Power'] = meter_data['einspeisung']['l1_power']
self._dbusservice['/Ac/L2/Power'] = meter_data['einspeisung']['l2_power']
self._dbusservice['/Ac/L3/Power'] = meter_data['einspeisung']['l3_power']
self._dbusservice['/Ac/L1/Energy/Forward'] = meter_data['einspeisung']['l1_import']
self._dbusservice['/Ac/L2/Energy/Forward'] = meter_data['einspeisung']['l2_import']
self._dbusservice['/Ac/L3/Energy/Forward'] = meter_data['einspeisung']['l3_import']
self._dbusservice['/Ac/L1/Energy/Reverse'] = meter_data['einspeisung']['l1_export']
self._dbusservice['/Ac/L2/Energy/Reverse'] = meter_data['einspeisung']['l2_export']
self._dbusservice['/Ac/L3/Energy/Reverse'] = meter_data['einspeisung']['l3_export']
self._dbusservice['/Ac/Energy/Forward'] = self._dbusservice['/Ac/L1/Energy/Forward'] + self._dbusservice['/Ac/L2/Energy/Forward'] + self._dbusservice['/Ac/L3/Energy/Forward']
self._dbusservice['/Ac/Energy/Reverse'] = self._dbusservice['/Ac/L1/Energy/Reverse'] + self._dbusservice['/Ac/L2/Energy/Reverse'] + self._dbusservice['/Ac/L3/Energy/Reverse']
#logging
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("---");
# increment UpdateIndex - to show that new data is available
index = self._dbusservice['/UpdateIndex'] + 1 # increment index
if index > 255: # maximum value of the index
index = 0 # overflow from 255 to 0
self._dbusservice['/UpdateIndex'] = index
#update lastupdate vars
self._lastUpdate = time.time()
except Exception as e:
logging.critical('Error at %s', '_update', exc_info=e)
# 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
return True
def _handlechangedvalue(self, path, value):
logging.debug("someone else updated %s to %s" % (path, value))
return True # accept the change
def main():
#configure logging
logging.basicConfig( format='%(asctime)s,%(msecs)d %(name)s %(levelname)s %(message)s',
datefmt='%Y-%m-%d %H:%M:%S',
level=logging.INFO,
handlers=[
logging.FileHandler("%s/current.log" % (os.path.dirname(os.path.realpath(__file__)))),
logging.StreamHandler()
])
try:
logging.info("Start");
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)
#formatting
_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')
#start our main-service
pvac_output = NodeRedMeterEinspeisung(
servicename='com.victronenergy.grid',
deviceinstance=40,
paths={
'/Ac/Energy/Forward': {'initial': 0, 'textformat': _kwh}, # energy bought from the grid
'/Ac/Energy/Reverse': {'initial': 0, 'textformat': _kwh}, # energy sold to the grid
'/Ac/Power': {'initial': 0, 'textformat': _w},
'/Ac/Current': {'initial': 0, 'textformat': _a},
'/Ac/Voltage': {'initial': 0, 'textformat': _v},
'/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/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},
})
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()