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dbus-virtual-battery.py
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dbus-virtual-battery.py
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from gi.repository import GLib
import logging
import sys
import os
import dbus
from datetime import datetime as dt # for UTC time stamps for logging
import time # for charge measurement
import requests
import json
from mqttclient import VictronMQTTClient
sys.path.append('/opt/victronenergy/dbus-systemcalc-py/ext/velib_python')
from vedbus import VeDbusService # , VeDbusItemImport
class DbusVirtualBatService(object):
lastMessage = time.time()
timeoutInSeconds = None
def __init__(self, timeout, servicename='com.victronenergy.battery.virtual'):
self.timeoutInSeconds = timeout
self._dbusservice = VeDbusService(servicename)
self._dbusConn = dbus.SessionBus(
) if 'DBUS_SESSION_BUS_ADDRESS' in os.environ else dbus.SystemBus()
# Create the mandatory objects
self._dbusservice.add_mandatory_paths(processname=__file__, processversion='0.0', connection='Virtual',
deviceinstance=15, productid=0, productname='VirtualBattery MQTT', firmwareversion=0.1,
hardwareversion='0.0', connected=1)
# Create DC paths
self._dbusservice.add_path(
'/Dc/0/Voltage', None, writeable=True, gettextcallback=lambda a, x: "{:.2f}V".format(x))
self._dbusservice.add_path(
'/Dc/0/Current', None, writeable=True, gettextcallback=lambda a, x: "{:.1f}A".format(x))
self._dbusservice.add_path(
'/Dc/0/Power', None, writeable=True, gettextcallback=lambda a, x: "{:.0f}W".format(x))
# Create capacity paths
self._dbusservice.add_path('/Soc', None, writeable=True)
# self._dbusservice.add_path('/Capacity', None, writeable=True, gettextcallback=lambda a, x: "{:.0f}Ah".format(x))
# self._dbusservice.add_path('/InstalledCapacity', None, gettextcallback=lambda a, x: "{:.0f}Ah".format(x))
# self._dbusservice.add_path('/ConsumedAmphours', None, gettextcallback=lambda a, x: "{:.0f}Ah".format(x))
# Create temperature paths
# self._dbusservice.add_path('/Dc/0/Temperature', None, writeable=True)
self._dbusservice.add_path(
'/System/MinCellTemperature', None, writeable=True)
self._dbusservice.add_path(
'/System/MaxCellTemperature', None, writeable=True)
# self._dbusservice.add_path('/System/MaxTemperatureCellId', None, writeable=True)
# self._dbusservice.add_path('/System/MinTemperatureCellId', None, writeable=True)
# Create extras paths
self._dbusservice.add_path(
'/System/MinCellVoltage', None, writeable=True)
# self._dbusservice.add_path('/System/MinVoltageCellId', None, writeable=True)
self._dbusservice.add_path(
'/System/MaxCellVoltage', None, writeable=True)
# self._dbusservice.add_path('/System/MaxVoltageCellId', None, writeable=True)
# self._dbusservice.add_path('/System/NrOfCellsPerBattery', None, writeable=True)
# self._dbusservice.add_path('/System/NrOfModulesOnline', None, writeable=True)
# self._dbusservice.add_path('/System/NrOfModulesOffline', None, writeable=True)
# self._dbusservice.add_path('/System/NrOfModulesBlockingCharge', None, writeable=True)
# self._dbusservice.add_path('/System/NrOfModulesBlockingDischarge', None, writeable=True)
# Create alarm paths
# self._dbusservice.add_path('/Alarms/LowVoltage', None, writeable=True)
# self._dbusservice.add_path('/Alarms/HighVoltage', None, writeable=True)
# self._dbusservice.add_path('/Alarms/LowCellVoltage', None, writeable=True)
# self._dbusservice.add_path('/Alarms/LowSoc', None, writeable=True)
# self._dbusservice.add_path('/Alarms/HighChargeCurrent', None, writeable=True)
# self._dbusservice.add_path('/Alarms/HighDischargeCurrent', None, writeable=True)
# self._dbusservice.add_path('/Alarms/CellImbalance', None, writeable=True)
self._dbusservice.add_path(
'/Alarms/InternalFailure', None, writeable=True)
# self._dbusservice.add_path('/Alarms/HighChargeTemperature', None, writeable=True)
# self._dbusservice.add_path('/Alarms/LowChargeTemperature', None, writeable=True)
# self._dbusservice.add_path('/Alarms/HighTemperature', None, writeable=True)
# self._dbusservice.add_path('/Alarms/LowTemperature', None, writeable=True)
#self._dbusservice.add_path('/Alarms/HighCellVoltage', None, writeable=True)
# Create control paths
self._dbusservice.add_path('/Info/MaxChargeCurrent', None,
writeable=True, gettextcallback=lambda a, x: "{:.0f}A".format(x))
self._dbusservice.add_path('/Info/MaxDischargeCurrent', None,
writeable=True, gettextcallback=lambda a, x: "{:.0f}A".format(x))
self._dbusservice.add_path('/Info/MaxChargeVoltage', None,
writeable=True, gettextcallback=lambda a, x: "{:.1f}V".format(x))
def checkLastMessage(self):
if (time.time() - self.lastMessage > self.timeoutInSeconds):
logging.info(
f'{dt.now()} Timeout on MQTT message. Setting failsafe...')
# print(f'{dt.now()} Timeout on MQTT message. Setting failsafe...')
self.setFailsafeSettings()
return True
def setFailsafeSettings(self):
'''construct custom json obj
call update manually
'''
#json string data
data = '''{
"Voltage": 53.8,
"Current": 0,
"Power": 0,
"Soc" : 0,
"MaxCellTemperature" : 0,
"MinCellTemperature" : 0,
"MaxCellVoltage" : 3.65,
"MinCellVoltage" : 2.70,
"InternalFailure" : 1,
"MaxChargeCurrent" : 0,
"MaxDischargeCurrent" : 0,
"MaxChargeVoltage" : 53.8
}'''
data = json.loads(data)
self._update(data)
def callback(self, client, userdata, msg):
# print(f"Received `{msg.payload.decode()}` from `{msg.topic}` topic")
data = json.loads(msg.payload)
# in case we receive data we set this to 0
data['InternalFailure'] = 0
self._update(data)
def _update(self, data):
try:
# logging.info(f'received data: {data}')
# print(f'received data: {data}')
with self._dbusservice as bus:
bus['/Dc/0/Voltage'] = round(data.get('Voltage'), 2)
bus['/Dc/0/Current'] = round(data.get('Current'), 2)
bus['/Dc/0/Power'] = round(data.get('Power'), 0)
bus['/Soc'] = data.get('Soc')
# bus['/Capacity'] = Capacity
# bus['/InstalledCapacity'] = InstalledCapacity
# bus['/ConsumedAmphours'] = ConsumedAmphours
# bus['/Dc/0/Temperature'] = Temperature
bus['/System/MaxCellTemperature'] = data.get(
'MaxCellTemperature')
bus['/System/MinCellTemperature'] = data.get(
'MinCellTemperature')
bus['/System/MaxCellVoltage'] = data.get('MaxCellVoltage')
# bus['/System/MaxVoltageCellId'] = MaxVoltageCellId
bus['/System/MinCellVoltage'] = data.get('MinCellVoltage')
# bus['/System/MinVoltageCellId'] = MinVoltageCellId
# bus['/System/NrOfCellsPerBattery'] = NrOfCellsPerBattery
# bus['/System/NrOfModulesOnline'] = NrOfModulesOnline
# bus['/System/NrOfModulesOffline'] = NrOfModulesOffline
# bus['/System/NrOfModulesBlockingCharge'] = data.get('ModulesBlockingCharge')
# bus['/System/NrOfModulesBlockingDischarge'] = NrOfModulesBlockingDischarge
# bus['/Alarms/LowVoltage'] = LowVoltage_alarm
# bus['/Alarms/HighVoltage'] = HighVoltage_alarm
# bus['/Alarms/LowCellVoltage'] = LowCellVoltage_alarm
# bus['/Alarms/LowSoc'] = LowSoc_alarm
# bus['/Alarms/HighChargeCurrent'] = HighChargeCurrent_alarm
# bus['/Alarms/HighDischargeCurrent'] = HighDischargeCurrent_alarm
# bus['/Alarms/CellImbalance'] = CellImbalance_alarm
bus['/Alarms/InternalFailure'] = data.get('InternalFailure')
# bus['/Alarms/HighChargeTemperature'] = HighChargeTemperature_alarm
# bus['/Alarms/LowChargeTemperature'] = LowChargeTemperature_alarm
# bus['/Alarms/HighTemperature'] = HighChargeTemperature_alarm
# bus['/Alarms/LowTemperature'] = LowChargeTemperature_alarm
bus['/Info/MaxChargeCurrent'] = data.get('MaxChargeCurrent')
bus['/Info/MaxDischargeCurrent'] = data.get(
'MaxDischargeCurrent')
bus['/Info/MaxChargeVoltage'] = data.get('MaxChargeVoltage')
self.lastMessage = time.time()
except Exception as e:
logging.info(
f'{dt.now()}:{e}, error occurred during update, retrying..')
# print(f'{dt.now()}:{e}, error occurred during update, retrying..')
# self.setFailsafeSettings()
return True
def main():
logging.basicConfig(filename='virtualbattery.log', level=logging.INFO)
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)
customService = DbusVirtualBatService(60)
logging.info(f'{dt.now()} Connected to dbus')
# Configuration MQTT
client = VictronMQTTClient(
'localhost', 1883, 'virtualbattery', customService.callback)
client.start()
GLib.timeout_add_seconds(customService.timeoutInSeconds, customService.checkLastMessage)
mainloop = GLib.MainLoop()
mainloop.run()
if __name__ == "__main__":
main()