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dbushelper.py
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dbushelper.py
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# -*- coding: utf-8 -*-
import sys
import os
import platform
import dbus
import traceback
# Victron packages
sys.path.insert(
1,
os.path.join(
os.path.dirname(__file__),
"/opt/victronenergy/dbus-systemcalc-py/ext/velib_python",
),
)
from vedbus import VeDbusService
from settingsdevice import SettingsDevice
import inverter
from utils import logger
import utils
def get_bus():
return (
dbus.SessionBus()
if "DBUS_SESSION_BUS_ADDRESS" in os.environ
else dbus.SystemBus()
)
class DbusHelper:
def __init__(self, inverter):
self.inverter = inverter
self.instance = 1
self.settings = None
self.error_count = 0
self._dbusservice = VeDbusService(
"com.victronenergy.pvinverter."
+ self.inverter.port[self.inverter.port.rfind("/") + 1 :],
get_bus(),
)
def setup_instance(self):
inverter_id = self.inverter.port[self.inverter.port.rfind("/") + 1 :]
path = "/Settings/Devices/serialinverter"
default_instance = "inverter:20" # pvinverters from 20-29
settings = {
"instance": [
path + "_" + str(inverter_id).replace(" ", "_") + "/ClassAndVrmInstance",
default_instance,
0,
0,
],
}
self.settings = SettingsDevice(get_bus(), settings, self.handle_changed_setting)
self.inverter.role, self.instance = self.get_role_instance()
def get_role_instance(self):
val = self.settings["instance"].split(":")
logger.info("DeviceInstance = %d", int(val[1]))
return val[0], int(val[1])
def handle_changed_setting(self, setting, oldvalue, newvalue):
if setting == "instance":
self.inverter.role, self.instance = self.get_role_instance()
logger.info("Changed DeviceInstance = %d", self.instance)
return
logger.info("Changed DeviceInstance = %d", self.instance)
def gettextforkWh(self, path, value):
return ("%.2FkWh" % (float(value)))
def gettextforW(self, path, value):
return ("%.0FW" % (float(value)))
def gettextforV(self, path, value):
return ("%.0FV" % (float(value)))
def gettextforA(self, path, value):
return ("%.0FA" % (float(value)))
def setup_vedbus(self):
# Set up dbus service and device instance
# and notify of all the attributes we intend to update
# This is only called once when a inverter is initiated
self.setup_instance()
short_port = self.inverter.port[self.inverter.port.rfind("/") + 1 :]
logger.info("%s" % ("com.victronenergy.pvinverter." + short_port))
# Get the settings for the inverter
if not self.inverter.get_settings():
return False
# 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", "Serial " + self.inverter.port)
# Create the mandatory objects
self._dbusservice.add_path("/DeviceInstance", self.instance)
self._dbusservice.add_path("/ProductId", 0xA144)
self._dbusservice.add_path("/ProductName", "SerialInverter (" + self.inverter.type + ")")
self._dbusservice.add_path("/FirmwareVersion", str(utils.DRIVER_VERSION) + utils.DRIVER_SUBVERSION)
self._dbusservice.add_path("/HardwareVersion", self.inverter.hardware_version)
self._dbusservice.add_path("/Connected", 1)
self._dbusservice.add_path("/CustomName", "SerialInverter (" + self.inverter.type + ")", writeable=True)
# Create static inverter info
self._dbusservice.add_path('/Ac/MaxPower', self.inverter.max_ac_power)
self._dbusservice.add_path('/Position', self.inverter.position) # 0 = AC input 1; 1 = AC output; 2 = AC input 2
self._dbusservice.add_path('/Serial', self.inverter.serial_number)
self._dbusservice.add_path('/StatusCode', 0) # 0=Startup 0; 1=Startup 1; 2=Startup 2; 3=Startup 3; 4=Startup 4; 5=Startup 5; 6=Startup 6; 7=Running; 8=Standby; 9=Boot loading; 10=Error
self._dbusservice.add_path('/UpdateIndex', 0)
# Create dynamic inverter info
self._dbusservice.add_path("/Ac/L1/Voltage", 0, gettextcallback=self.gettextforV)
self._dbusservice.add_path("/Ac/L1/Current", 0, gettextcallback=self.gettextforA)
self._dbusservice.add_path("/Ac/L1/Power", 0, gettextcallback=self.gettextforW)
self._dbusservice.add_path("/Ac/L1/Energy/Forward", 0, gettextcallback=self.gettextforkWh)
self._dbusservice.add_path("/Ac/L2/Voltage", 0, gettextcallback=self.gettextforV)
self._dbusservice.add_path("/Ac/L2/Current", 0, gettextcallback=self.gettextforA)
self._dbusservice.add_path("/Ac/L2/Power", 0, gettextcallback=self.gettextforW)
self._dbusservice.add_path("/Ac/L2/Energy/Forward", 0, gettextcallback=self.gettextforkWh)
self._dbusservice.add_path("/Ac/L3/Voltage", 0, gettextcallback=self.gettextforV)
self._dbusservice.add_path("/Ac/L3/Current", 0, gettextcallback=self.gettextforA)
self._dbusservice.add_path("/Ac/L3/Power", 0, gettextcallback=self.gettextforW)
self._dbusservice.add_path("/Ac/L3/Energy/Forward", 0, gettextcallback=self.gettextforkWh)
self._dbusservice.add_path("/Ac/Power", 0, gettextcallback=self.gettextforW)
self._dbusservice.add_path("/Ac/Energy/Forward", 0, gettextcallback=self.gettextforkWh)
# FIXME: This is killing zero feed-in regulation
self._dbusservice.add_path('/Ac/PowerLimit', self.inverter.energy_data['overall']['power_limit'], gettextcallback=self.gettextforW)
logger.info(f"Publish config values = {utils.PUBLISH_CONFIG_VALUES}")
if utils.PUBLISH_CONFIG_VALUES == 1:
utils.publish_config_variables(self._dbusservice)
return True
def publish_inverter(self, loop):
# This is called every inverter.poll_interval milli second as set up per inverter type to read and update the data
self.inverter.energy_data['overall']['power_limit'] = self._dbusservice['/Ac/PowerLimit']
try:
# Call the inverter's refresh_data function
success = self.inverter.refresh_data()
if success:
self.error_count = 0
self.inverter.online = True
self.inverter.poll_interval = utils.INVERTER_POLL_INTERVAL
else:
self.error_count += 1
# If the inverter is offline for more than 10 polls (polled every second for most inverters)
if self.error_count >= 10:
self.inverter.online = False
# If the inverter is offline for more than 60 polls, quit. VenusOS will restart the driver anyway.
if self.error_count >= 60:
logger.warn("Inverter seems to be offline, quitting!")
loop.quit()
# Publish all the data from the inverter object to dbus
self.publish_dbus()
except:
traceback.print_exc()
loop.quit()
def publish_dbus(self):
self._dbusservice['/StatusCode'] = self.inverter.status
self._dbusservice['/Ac/L1/Voltage'] = self.inverter.energy_data['L1']['ac_voltage']
self._dbusservice['/Ac/L1/Current'] = self.inverter.energy_data['L1']['ac_current']
self._dbusservice['/Ac/L1/Power'] = self.inverter.energy_data['L1']['ac_power']
self._dbusservice['/Ac/L1/Energy/Forward'] = self.inverter.energy_data['L1']['energy_forwarded']
self._dbusservice['/Ac/L2/Voltage'] = self.inverter.energy_data['L2']['ac_voltage']
self._dbusservice['/Ac/L2/Current'] = self.inverter.energy_data['L2']['ac_current']
self._dbusservice['/Ac/L2/Power'] = self.inverter.energy_data['L2']['ac_power']
self._dbusservice['/Ac/L2/Energy/Forward'] = self.inverter.energy_data['L2']['energy_forwarded']
self._dbusservice['/Ac/L3/Voltage'] = self.inverter.energy_data['L3']['ac_voltage']
self._dbusservice['/Ac/L3/Current'] = self.inverter.energy_data['L3']['ac_current']
self._dbusservice['/Ac/L3/Power'] = self.inverter.energy_data['L3']['ac_power']
self._dbusservice['/Ac/L3/Energy/Forward'] = self.inverter.energy_data['L3']['energy_forwarded']
self._dbusservice['/Ac/Power'] = self.inverter.energy_data['overall']['ac_power']
self._dbusservice['/Ac/Energy/Forward'] = self.inverter.energy_data['overall']['energy_forwarded']
# 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
logger.debug("published to dbus [%s]" % str(self.inverter.energy_data['overall']['ac_power']))