90 lines
2.5 KiB
Python
90 lines
2.5 KiB
Python
from pymodbus.client import ModbusTcpClient
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from pymodbus.exceptions import ModbusIOException
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from pymodbus.register_read_message import ReadHoldingRegistersResponse, ReadInputRegistersResponse
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from pymodbus.payload import BinaryPayloadBuilder, BinaryPayloadDecoder
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from pymodbus.constants import Endian
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from loguru import logger
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import sys
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import logging
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from time import sleep
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class LocalException(Exception):
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def __init__(self, msg='', cause=None):
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super().__init__(self)
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self.msg = msg
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self.cause = cause
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def __str__(self):
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return f"LocalException: Msg:{self.msg}, Cause:{self.cause}"
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def readInputRegister(client, addr):
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client.connect()
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try:
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res = client.read_input_registers(addr, 2, slave=2)
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if (isinstance(res, ReadInputRegistersResponse)):
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v = BinaryPayloadDecoder.fromRegisters(res.registers, byteorder=Endian.Big, wordorder=Endian.Big).decode_32bit_float()
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return v
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elif (isinstance(res, ModbusIOException)):
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msg = f"Error: {type(res)}, Content: {res}"
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logger.warning(msg)
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raise LocalException(msg=msg, cause=res)
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else:
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msg = f"Unknown type: {type(res)}, Content: {res}"
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logger.warning(msg)
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raise LocalException(msg=msg)
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finally:
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client.close()
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def writeCoil(client, addr, value):
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client.connect()
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try:
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res = client.write_coil(addr, value, slave=1)
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logger.debug(f"write coil result {res}")
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return value
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finally:
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client.close()
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l = logging.getLogger()
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for h in l.handlers:
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l.removeHandler(h)
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client = ModbusTcpClient("172.16.2.42")
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registers = [
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{ "addr":0x0046, "name":"Frequency", "unit":"Hz" },
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{ "addr":0x0048, "name":"Import active energy", "unit":"kWh" },
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{ "addr":0x004a, "name":"Export active energy", "unit":"kWh" },
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{ "addr":0x004c, "name":"Import reactive energy", "unit":"kvarh" },
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{ "addr":0x004e, "name":"Export reactive energy", "unit":"kvarh" },
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{ "addr":0x000c, "name":"Active power", "unit":"W" },
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{ "addr":0x0058, "name":"Positive power", "unit":"W" },
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{ "addr":0x005c, "name":"Reverse power", "unit":"W" },
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{ "addr":0x0000, "name":"Voltage", "unit":"V" },
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{ "addr":0x0006, "name":"Current", "unit":"A" }
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]
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cnt = 0
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coilState = True
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while True:
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try:
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for reg in registers:
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v = readInputRegister(client, reg['addr'])
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logger.info(f"{reg['name']}: {v} {reg['unit']}")
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cnt += 1
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if ((cnt % 2) == 0):
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coilState = not coilState
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logger.info(f"Write {coilState} to coil")
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writeCoil(client, 0, coilState)
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sleep(5)
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except Exception as e:
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logger.error(f"Caught exception: {str(e)}")
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