mirror of
https://github.com/thingsboard/thingsboard-gateway
synced 2025-10-26 22:31:42 +08:00
541 lines
26 KiB
Python
541 lines
26 KiB
Python
# Copyright 2022. ThingsBoard
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from threading import Thread
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from time import sleep, time
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from queue import Queue
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from random import choice
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from string import ascii_lowercase
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from thingsboard_gateway.tb_utility.tb_utility import TBUtility
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# Try import Pymodbus library or install it and import
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try:
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from pymodbus.constants import Defaults
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except ImportError:
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print("Modbus library not found - installing...")
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TBUtility.install_package("pymodbus", ">=2.3.0")
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TBUtility.install_package('pyserial')
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from pymodbus.constants import Defaults
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try:
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from twisted.internet import reactor
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except ImportError:
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TBUtility.install_package('twisted')
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from twisted.internet import reactor
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from twisted.internet import reactor
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from pymodbus.bit_write_message import WriteSingleCoilResponse, WriteMultipleCoilsResponse
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from pymodbus.register_write_message import WriteMultipleRegistersResponse, WriteSingleRegisterResponse
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from pymodbus.register_read_message import ReadRegistersResponseBase
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from pymodbus.bit_read_message import ReadBitsResponseBase
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from pymodbus.client.sync import ModbusTcpClient, ModbusUdpClient, ModbusSerialClient
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from pymodbus.client.sync import ModbusRtuFramer, ModbusSocketFramer, ModbusAsciiFramer
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from pymodbus.exceptions import ConnectionException
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from pymodbus.server.asynchronous import StartTcpServer, StartUdpServer, StartSerialServer, StopServer
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from pymodbus.device import ModbusDeviceIdentification
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from pymodbus.version import version
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from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
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from pymodbus.datastore import ModbusSparseDataBlock
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from thingsboard_gateway.connectors.connector import Connector, log
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from thingsboard_gateway.connectors.modbus.constants import *
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from thingsboard_gateway.connectors.modbus.slave import Slave
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from thingsboard_gateway.connectors.modbus.backward_compability_adapter import BackwardCompatibilityAdapter
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from thingsboard_gateway.connectors.modbus.bytes_modbus_downlink_converter import BytesModbusDownlinkConverter
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CONVERTED_DATA_SECTIONS = [ATTRIBUTES_PARAMETER, TELEMETRY_PARAMETER]
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FRAMER_TYPE = {
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'rtu': ModbusRtuFramer,
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'socket': ModbusSocketFramer,
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'ascii': ModbusAsciiFramer
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}
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SLAVE_TYPE = {
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'tcp': StartTcpServer,
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'udp': StartUdpServer,
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'serial': StartSerialServer
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}
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FUNCTION_TYPE = {
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'coils_initializer': 'ci',
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'holding_registers': 'hr',
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'input_registers': 'ir',
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'discrete_inputs': 'di'
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}
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FUNCTION_CODE_WRITE = {
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'holding_registers': (6, 16),
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'coils_initializer': (5, 15)
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}
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FUNCTION_CODE_READ = {
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'holding_registers': 3,
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'coils_initializer': 1,
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'input_registers': 4,
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'discrete_inputs': 2
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}
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class ModbusConnector(Connector, Thread):
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process_requests = Queue(-1)
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def __init__(self, gateway, config, connector_type):
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self.statistics = {STATISTIC_MESSAGE_RECEIVED_PARAMETER: 0,
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STATISTIC_MESSAGE_SENT_PARAMETER: 0}
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super().__init__()
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self.__gateway = gateway
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self._connector_type = connector_type
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self.__backward_compatibility_adapter = BackwardCompatibilityAdapter(config, gateway.get_config_path())
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self.__config = self.__backward_compatibility_adapter.convert()
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self.setName(self.__config.get("name", 'Modbus Default ' + ''.join(choice(ascii_lowercase) for _ in range(5))))
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self.__connected = False
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self.__stopped = False
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self.daemon = True
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if self.__config.get('slave'):
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self.__slave_thread = Thread(target=self.__configure_and_run_slave, args=(self.__config['slave'],),
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daemon=True, name='Gateway as a slave')
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self.__slave_thread.start()
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if config['slave'].get('sendDataToThingsBoard', False):
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self.__modify_main_config()
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self.__slaves = []
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self.__load_slaves()
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def is_connected(self):
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return self.__connected
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def open(self):
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self.__stopped = False
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self.start()
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def run(self):
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self.__connected = True
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while True:
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if not self.__stopped and not ModbusConnector.process_requests.empty():
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thread = Thread(target=self.__process_slaves, daemon=True)
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thread.start()
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if self.__stopped:
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break
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sleep(.2)
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@staticmethod
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def __configure_and_run_slave(config):
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identity = None
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if config.get('identity'):
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identity = ModbusDeviceIdentification()
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identity.VendorName = config['identity'].get('vendorName', '')
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identity.ProductCode = config['identity'].get('productCode', '')
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identity.VendorUrl = config['identity'].get('vendorUrl', '')
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identity.ProductName = config['identity'].get('productName', '')
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identity.ModelName = config['identity'].get('ModelName', '')
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identity.MajorMinorRevision = version.short()
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blocks = {}
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for (key, value) in config.get('values').items():
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values = {}
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converter = BytesModbusDownlinkConverter({})
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for item in value:
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for section in ('attributes', 'timeseries', 'attributeUpdates', 'rpc'):
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for val in item.get(section, []):
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function_code = FUNCTION_CODE_WRITE[key][0] if val['objectsCount'] <= 1 else \
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FUNCTION_CODE_WRITE[key][1]
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converted_value = converter.convert(
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{**val,
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'device': config.get('deviceName', 'Gateway'), 'functionCode': function_code,
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'byteOrder': config['byteOrder']},
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{'data': {'params': val['value']}})
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values[val['address'] + 1] = converted_value
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blocks[FUNCTION_TYPE[key]] = ModbusSparseDataBlock(values)
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context = ModbusServerContext(slaves=ModbusSlaveContext(**blocks), single=True)
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SLAVE_TYPE[config['type']](context, identity=identity,
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address=(config.get('host'), config.get('port')) if (
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config['type'] == 'tcp' or 'udp') else None,
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port=config.get('port') if config['type'] == 'serial' else None,
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framer=FRAMER_TYPE[config['method']])
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def __modify_main_config(self):
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config = self.__config['slave']
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values = config.pop('values')
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device = config
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for (register, reg_values) in values.items():
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for value in reg_values:
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for section in ('attributes', 'timeseries', 'attributeUpdates', 'rpc'):
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if not device.get(section):
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device[section] = []
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for item in value.get(section, []):
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device[section].append({**item, 'functionCode': FUNCTION_CODE_READ[
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register] if section not in ('attributeUpdates', 'rpc') else item['functionCode']})
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self.__config['master']['slaves'].append(device)
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def __load_slaves(self):
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self.__slaves = [
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Slave(**{**device, 'connector': self, 'gateway': self.__gateway, 'callback': ModbusConnector.callback}) for
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device in self.__config.get('master', {'slaves': []}).get('slaves', [])]
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@classmethod
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def callback(cls, slave):
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cls.process_requests.put(slave)
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@property
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def connector_type(self):
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return self._connector_type
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def __convert_and_save_data(self, config_tuple):
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device, current_device_config, config, device_responses = config_tuple
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converted_data = {}
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try:
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converted_data = device.config[UPLINK_PREFIX + CONVERTER_PARAMETER].convert(
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config=config,
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data=device_responses)
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except Exception as e:
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log.error(e)
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to_send = {DEVICE_NAME_PARAMETER: converted_data[DEVICE_NAME_PARAMETER],
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DEVICE_TYPE_PARAMETER: converted_data[DEVICE_TYPE_PARAMETER],
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TELEMETRY_PARAMETER: [],
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ATTRIBUTES_PARAMETER: []
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}
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if current_device_config.get('sendDataOnlyOnChange'):
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self.statistics[STATISTIC_MESSAGE_RECEIVED_PARAMETER] += 1
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for converted_data_section in CONVERTED_DATA_SECTIONS:
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for current_section_dict in converted_data[converted_data_section]:
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for key, value in current_section_dict.items():
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if device.config[LAST_PREFIX + converted_data_section].get(key) is None or \
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device.config[LAST_PREFIX + converted_data_section][key] != value:
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device.config[LAST_PREFIX + converted_data_section][key] = value
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to_send[converted_data_section].append({key: value})
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elif converted_data and current_device_config.get('sendDataOnlyOnChange') is None or \
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not current_device_config.get('sendDataOnlyOnChange'):
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self.statistics[STATISTIC_MESSAGE_RECEIVED_PARAMETER] += 1
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for converted_data_section in CONVERTED_DATA_SECTIONS:
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device.config[LAST_PREFIX + converted_data_section] = converted_data[
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converted_data_section]
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to_send[converted_data_section] = converted_data[converted_data_section]
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if to_send.get(ATTRIBUTES_PARAMETER) or to_send.get(TELEMETRY_PARAMETER):
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self.__gateway.send_to_storage(self.get_name(), to_send)
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self.statistics[STATISTIC_MESSAGE_SENT_PARAMETER] += 1
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def close(self):
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self.__stopped = True
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self.__stop_connections_to_masters()
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if reactor.running:
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StopServer()
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log.info('%s has been stopped.', self.get_name())
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def get_name(self):
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return self.name
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def __process_slaves(self):
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# TODO: write documentation
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device = ModbusConnector.process_requests.get()
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device_responses = {'timeseries': {}, 'attributes': {}}
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current_device_config = {}
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try:
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for config_section in device_responses:
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if device.config.get(config_section) is not None:
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current_device_config = device.config
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self.__connect_to_current_master(device)
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if not device.config['master'].is_socket_open() or not len(
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current_device_config[config_section]):
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continue
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# Reading data from device
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for interested_data in range(len(current_device_config[config_section])):
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current_data = current_device_config[config_section][interested_data]
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current_data[DEVICE_NAME_PARAMETER] = device
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input_data = self.__function_to_device(device, current_data)
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device_responses[config_section][current_data[TAG_PARAMETER]] = {
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"data_sent": current_data,
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"input_data": input_data}
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log.debug("Checking %s for device %s", config_section, device)
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log.debug('Device response: ', device_responses)
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if device_responses.get('timeseries') or device_responses.get('attributes'):
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self.__convert_and_save_data((device, current_device_config, {
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**current_device_config,
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BYTE_ORDER_PARAMETER: current_device_config.get(BYTE_ORDER_PARAMETER,
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device.byte_order),
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WORD_ORDER_PARAMETER: current_device_config.get(WORD_ORDER_PARAMETER,
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device.word_order)
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}, device_responses))
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except ConnectionException:
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sleep(5)
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log.error("Connection lost! Reconnecting...")
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except Exception as e:
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log.exception(e)
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def __connect_to_current_master(self, device=None):
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# TODO: write documentation
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connect_attempt_count = 5
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connect_attempt_time_ms = 100
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wait_after_failed_attempts_ms = 300000
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if device.config.get('master') is None:
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device.config['master'], device.config['available_functions'] = self.__configure_master(device.config)
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if connect_attempt_count < 1:
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connect_attempt_count = 1
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connect_attempt_time_ms = device.config.get('connectAttemptTimeMs', connect_attempt_time_ms)
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if connect_attempt_time_ms < 500:
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connect_attempt_time_ms = 500
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wait_after_failed_attempts_ms = device.config.get('waitAfterFailedAttemptsMs', wait_after_failed_attempts_ms)
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if wait_after_failed_attempts_ms < 1000:
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wait_after_failed_attempts_ms = 1000
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current_time = time() * 1000
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if not device.config['master'].is_socket_open():
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if device.config['connection_attempt'] >= connect_attempt_count and current_time - device.config[
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'last_connection_attempt_time'] >= wait_after_failed_attempts_ms:
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device.config['connection_attempt'] = 0
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while not device.config['master'].is_socket_open() \
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and device.config['connection_attempt'] < connect_attempt_count \
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and current_time - device.config.get('last_connection_attempt_time',
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0) >= connect_attempt_time_ms:
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device.config['connection_attempt'] = device.config[
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'connection_attempt'] + 1
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device.config['last_connection_attempt_time'] = current_time
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log.debug("Modbus trying connect to %s", device)
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device.config['master'].connect()
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if device.config['connection_attempt'] == connect_attempt_count:
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log.warn("Maximum attempt count (%i) for device \"%s\" - encountered.", connect_attempt_count,
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device)
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if device.config['connection_attempt'] >= 0 and device.config['master'].is_socket_open():
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device.config['connection_attempt'] = 0
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device.config['last_connection_attempt_time'] = current_time
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@staticmethod
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def __configure_master(config):
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current_config = config
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current_config["rtu"] = FRAMER_TYPE[current_config['method']]
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if current_config.get('type') == 'tcp':
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master = ModbusTcpClient(current_config["host"],
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current_config["port"],
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current_config["rtu"],
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timeout=current_config["timeout"],
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retry_on_empty=current_config["retry_on_empty"],
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retry_on_invalid=current_config["retry_on_invalid"],
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retries=current_config["retries"])
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elif current_config.get(TYPE_PARAMETER) == 'udp':
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master = ModbusUdpClient(current_config["host"],
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current_config["port"],
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current_config["rtu"],
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timeout=current_config["timeout"],
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retry_on_empty=current_config["retry_on_empty"],
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retry_on_invalid=current_config["retry_on_invalid"],
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retries=current_config["retries"])
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elif current_config.get(TYPE_PARAMETER) == 'serial':
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master = ModbusSerialClient(method=current_config["method"],
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port=current_config["port"],
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timeout=current_config["timeout"],
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retry_on_empty=current_config["retry_on_empty"],
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retry_on_invalid=current_config["retry_on_invalid"],
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retries=current_config["retries"],
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baudrate=current_config["baudrate"],
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stopbits=current_config["stopbits"],
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bytesize=current_config["bytesize"],
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parity=current_config["parity"],
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strict=current_config["strict"])
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else:
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raise Exception("Invalid Modbus transport type.")
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available_functions = {
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1: master.read_coils,
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2: master.read_discrete_inputs,
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3: master.read_holding_registers,
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4: master.read_input_registers,
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5: master.write_coil,
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6: master.write_register,
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15: master.write_coils,
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16: master.write_registers,
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}
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return master, available_functions
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def __stop_connections_to_masters(self):
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for slave in self.__slaves:
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if slave.config.get('master') is not None and slave.config.get('master').is_socket_open():
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slave.config['master'].close()
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@staticmethod
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def __function_to_device(device, config):
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function_code = config.get('functionCode')
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result = None
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if function_code in (1, 2, 3, 4):
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result = device.config['available_functions'][function_code](address=config[ADDRESS_PARAMETER],
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count=config.get(OBJECTS_COUNT_PARAMETER,
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config.get("registersCount",
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config.get(
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"registerCount",
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1))),
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unit=device.config['unitId'])
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elif function_code in (5, 6):
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result = device.config['available_functions'][function_code](address=config[ADDRESS_PARAMETER],
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value=config[PAYLOAD_PARAMETER],
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unit=device.config['unitId'])
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elif function_code in (15, 16):
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result = device.config['available_functions'][function_code](address=config[ADDRESS_PARAMETER],
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values=config[PAYLOAD_PARAMETER],
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unit=device.config['unitId'])
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else:
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log.error("Unknown Modbus function with code: %s", function_code)
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log.debug("With result %s", str(result))
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if "Exception" in str(result):
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log.exception(result)
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return result
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|
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def on_attributes_update(self, content):
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try:
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device = tuple(filter(lambda slave: slave.name == content[DEVICE_SECTION_PARAMETER], self.__slaves))[0]
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|
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for attribute_updates_command_config in device.config['attributeUpdates']:
|
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for attribute_updated in content[DATA_PARAMETER]:
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if attribute_updates_command_config[TAG_PARAMETER] == attribute_updated:
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to_process = {
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DEVICE_SECTION_PARAMETER: content[DEVICE_SECTION_PARAMETER],
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DATA_PARAMETER: {
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RPC_METHOD_PARAMETER: attribute_updated,
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RPC_PARAMS_PARAMETER: content[DATA_PARAMETER][attribute_updated]
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}
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}
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attribute_updates_command_config['byteOrder'] = device.byte_order or 'LITTLE'
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attribute_updates_command_config['wordOrder'] = device.word_order or 'LITTLE'
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self.__process_request(to_process, attribute_updates_command_config,
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request_type='attributeUpdates')
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except Exception as e:
|
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log.exception(e)
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|
|
def server_side_rpc_handler(self, server_rpc_request):
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try:
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if server_rpc_request.get(DEVICE_SECTION_PARAMETER) is not None:
|
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log.debug("Modbus connector received rpc request for %s with server_rpc_request: %s",
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server_rpc_request[DEVICE_SECTION_PARAMETER],
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server_rpc_request)
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device = tuple(
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filter(
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lambda slave: slave.name == server_rpc_request[DEVICE_SECTION_PARAMETER], self.__slaves
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)
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|
)[0]
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|
|
if isinstance(device.config[RPC_SECTION], dict):
|
|
rpc_command_config = device.config[RPC_SECTION].get(
|
|
server_rpc_request[DATA_PARAMETER][RPC_METHOD_PARAMETER])
|
|
|
|
if rpc_command_config is not None:
|
|
self.__process_request(server_rpc_request, rpc_command_config)
|
|
|
|
elif isinstance(device.config[RPC_SECTION], list):
|
|
for rpc_command_config in device.config[RPC_SECTION]:
|
|
if rpc_command_config[TAG_PARAMETER] == server_rpc_request[DATA_PARAMETER][
|
|
RPC_METHOD_PARAMETER]:
|
|
self.__process_request(server_rpc_request, rpc_command_config)
|
|
break
|
|
else:
|
|
log.error("Received rpc request, but method %s not found in config for %s.",
|
|
server_rpc_request[DATA_PARAMETER].get(RPC_METHOD_PARAMETER),
|
|
self.get_name())
|
|
self.__gateway.send_rpc_reply(server_rpc_request[DEVICE_SECTION_PARAMETER],
|
|
server_rpc_request[DATA_PARAMETER][RPC_ID_PARAMETER],
|
|
{server_rpc_request[DATA_PARAMETER][
|
|
RPC_METHOD_PARAMETER]: "METHOD NOT FOUND!"})
|
|
else:
|
|
log.debug("Received RPC to connector: %r", server_rpc_request)
|
|
except Exception as e:
|
|
log.exception(e)
|
|
|
|
def __process_request(self, content, rpc_command_config, request_type='RPC'):
|
|
log.debug('Processing %s request', request_type)
|
|
if rpc_command_config is not None:
|
|
device = tuple(filter(lambda slave: slave.name == content[DEVICE_SECTION_PARAMETER], self.__slaves))[0]
|
|
rpc_command_config[UNIT_ID_PARAMETER] = device.config['unitId']
|
|
self.__connect_to_current_master(device)
|
|
|
|
if rpc_command_config.get(FUNCTION_CODE_PARAMETER) in (5, 6, 15, 16):
|
|
converted_data = device.config[DOWNLINK_PREFIX + CONVERTER_PARAMETER].convert(rpc_command_config,
|
|
content)
|
|
try:
|
|
rpc_command_config[PAYLOAD_PARAMETER] = converted_data[0]
|
|
except IndexError and TypeError:
|
|
rpc_command_config[PAYLOAD_PARAMETER] = converted_data
|
|
|
|
try:
|
|
response = self.__function_to_device(device, rpc_command_config)
|
|
except Exception as e:
|
|
log.exception(e)
|
|
response = e
|
|
|
|
if isinstance(response, (ReadRegistersResponseBase, ReadBitsResponseBase)):
|
|
to_converter = {
|
|
RPC_SECTION: {content[DATA_PARAMETER][RPC_METHOD_PARAMETER]: {"data_sent": rpc_command_config,
|
|
"input_data": response}}}
|
|
response = device.config[
|
|
UPLINK_PREFIX + CONVERTER_PARAMETER].convert(
|
|
config={**device.config,
|
|
BYTE_ORDER_PARAMETER: device.byte_order,
|
|
WORD_ORDER_PARAMETER: device.word_order
|
|
},
|
|
data=to_converter)
|
|
log.debug("Received %s method: %s, result: %r", request_type,
|
|
content[DATA_PARAMETER][RPC_METHOD_PARAMETER],
|
|
response)
|
|
elif isinstance(response, (WriteMultipleRegistersResponse,
|
|
WriteMultipleCoilsResponse,
|
|
WriteSingleCoilResponse,
|
|
WriteSingleRegisterResponse)):
|
|
log.debug("Write %r", str(response))
|
|
response = {"success": True}
|
|
|
|
if content.get(RPC_ID_PARAMETER) or (
|
|
content.get(DATA_PARAMETER) is not None and content[DATA_PARAMETER].get(RPC_ID_PARAMETER)):
|
|
if isinstance(response, Exception):
|
|
self.__gateway.send_rpc_reply(content[DEVICE_SECTION_PARAMETER],
|
|
content[DATA_PARAMETER][RPC_ID_PARAMETER],
|
|
{content[DATA_PARAMETER][RPC_METHOD_PARAMETER]: str(response)})
|
|
else:
|
|
self.__gateway.send_rpc_reply(content[DEVICE_SECTION_PARAMETER],
|
|
content[DATA_PARAMETER][RPC_ID_PARAMETER],
|
|
response)
|
|
|
|
log.debug("%r", response)
|