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import modbus_tk
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import modbus_tk.defines as cst
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from modbus_tk import modbus_tcp, hooks
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import logging
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import struct
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import threading
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import time
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# from protocol.ModBus.ByteOrder import *
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import threading
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class SearchSlaveThread(threading.Thread):
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def __init__(self, callback, master):
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super().__init__()
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self.stopEvent = threading.Event()
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self.callback = callback
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self.master = master
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def run(self):
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for address in range(1, 126):
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if not self.stopEvent.is_set():
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self.callback(address, self.master.judgeSlave(address))
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def stop(self):
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self.stopEvent.set()
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class DPV1Master():
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resetData = struct.unpack('>hhhh', b'\x00\x00\x00\x00\x00\x00\x00\x00')
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def __init__(self, host, port):
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try:
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self.master = modbus_tcp.TcpMaster(host = host, port = port)
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self.master.set_timeout(5.0)
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except Exception as e:
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self.master = None
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# hooks.install_hook("modbus_tcp.TcpMaster.after_recv", afterRecv)
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# hooks.install_hook("modbus_tcp.TcpMaster.after_send", afterSend)
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def writeMultipleRegister(self, slaveId, address, outputValue):
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if not self.master:
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return 'error'
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try:
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self.master.execute(slaveId, cst.WRITE_MULTIPLE_REGISTERS, starting_address = address, output_value=outputValue)
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except Exception as e:
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return 'error'
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def readHoldingRegisters(self, slaveId, startAddress, varNums):
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if not self.master:
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return 'error'
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try:
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value = self.master.execute(slaveId, cst.READ_HOLDING_REGISTERS, startAddress, varNums)
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return value
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except:
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return '读取错误'
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def areAllZeros(self, tup):
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return all(x == 0 for x in tup)
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def searchSlave(self, callback = None):
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# self.searchSlaveThread = SearchSlaveThread(callback = callback, master = self)
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# self.searchSlaveThread.start()
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data = self.readHoldingRegisters(1, 850, 64)
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if data == '读取错误':
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return data
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dataHex = struct.pack('>64h', *data)
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indices = [i for i, byte in enumerate(dataHex) if byte == 1]
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return "，".join(map(str, indices))
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def closeThread(self):
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self.searchSlaveThread.stop()
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def readParm(self, address, slot, index, length, callback = None):
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length = int(length)
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hexAddress = address.to_bytes(1, byteorder='little')
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slotByte = slot.to_bytes(1, byteorder='little')
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indexByte = index.to_bytes(1, byteorder='little')
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readByteStream = b'\x01' + hexAddress + slotByte + indexByte + b'\xF0\x00'
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readDate = struct.unpack('>hhh', readByteStream)
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# self.writeMultipleRegister(1, 750, self.resetData)
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# time.sleep(0.1)
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self.writeMultipleRegister(1, 750, readDate)
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time.sleep(1.1)
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value = self.readHoldingRegisters(1, 750, -(-length // 2)) # -(-length // 2)向上取整
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# print(value, 222)
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if value[0] == 57344:
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self.writeMultipleRegister(1, 750, self.resetData)
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time.sleep(0.1)
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return '读取错误'
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value = struct.pack('>{}H'.format(len(value)), *value)[:length]
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# print(value)
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# print(address, slot, index)
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# print(value)
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self.writeMultipleRegister(1, 750, self.resetData)
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time.sleep(0.1)
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# if callable(callback):
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# callback(value)
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# return
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return value
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def writeParm(self, address, slot, index, length, valueByte):
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length = int(length)
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hexAddress = address.to_bytes(1, byteorder='little')
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slotByte = slot.to_bytes(1, byteorder='little')
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indexByte = index.to_bytes(1, byteorder='little')
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lengthByte = length.to_bytes(1, byteorder='little')
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writeByteStream = b'\x02' + hexAddress + slotByte + indexByte + lengthByte + valueByte
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writeByteStream = writeByteStream if len(writeByteStream) % 2 == 0 else writeByteStream + b'\x00'
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self.writeMultipleRegister(1, 750, self.resetData)
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# print(len(writeByteStream))
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writeDate = struct.unpack('>{}h'.format(len(writeByteStream) // 2), writeByteStream)
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self.writeMultipleRegister(1, 750, writeDate)
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time.sleep(0.4)
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value = self.readHoldingRegisters(1, 750, 2)
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if value[0] == 57344:
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result = '写入错误'
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else:
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result = '写入成功'
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self.writeMultipleRegister(1, 750, self.resetData)
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time.sleep(0.1)
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return result
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def judgeSlave(self, address):
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# print(type(address))
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hexAddress = address.to_bytes(1, byteorder='little')
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searchByteStream = b'\x01' + hexAddress + b'\x01\x01\xF0\x00'
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# print(searchByteStream)
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searchDate = struct.unpack('>hhh', searchByteStream)
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self.writeMultipleRegister(1, 750, searchDate)
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time.sleep(1.1)
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dir = self.readHoldingRegisters(1, 750, 6)
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time.sleep(0.1)
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# print(dir)
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self.writeMultipleRegister(1, 750, self.resetData)
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time.sleep(0.1)
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# print(dir)
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if not self.areAllZeros(dir) and dir != 'error':
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return True
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else:
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return False
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def editDevAddress(self, oldAddress, newAddress, identNumer):
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oldAddressHex = oldAddress.to_bytes(length=1, byteorder='little')
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newAddressHex = newAddress.to_bytes(1, byteorder='little')
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closeProtocolHex = b'\x05\x00'
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closeProtocolData = struct.unpack('>h', closeProtocolHex)
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self.writeMultipleRegister(1, 750, closeProtocolData)
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time.sleep(1.5)
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# print(identNumer)
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idHighHex = int(identNumer[:2], 16).to_bytes(1, byteorder='little')
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idLowHex = int(identNumer[2:], 16).to_bytes(1, byteorder='little')
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editAddressStream = b'\x03' + oldAddressHex + b'\x00'+ newAddressHex + b'\x00' + idHighHex + b'\x00' + idLowHex
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# print(editAddressStream)
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editAddressDate = struct.unpack('>hhhh', editAddressStream)
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# print(editAddressDate)
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self.writeMultipleRegister(1, 750, self.resetData)
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time.sleep(0.7)
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self.writeMultipleRegister(1, 750, editAddressDate)
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time.sleep(0.4)
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value = self.readHoldingRegisters(1, 750, 2)
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if value[0] == 57344:
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result = '修改错误'
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else:
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result = '修改成功'
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openProtocolHex = b'\x05\x01'
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openProtocolData = struct.unpack('>h', openProtocolHex)
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self.writeMultipleRegister(1, 750, openProtocolData)
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time.sleep(0.2)
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self.writeMultipleRegister(1, 750, self.resetData)
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time.sleep(0.1)
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return result
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# def readInputRegisters(self, slaveId, startAddress, varNums, order = 'ABCD'):
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# try:
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# if order == 'int':
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# valueByte = self.master.execute(slaveId, cst.READ_INPUT_REGISTERS, startAddress, varNums)[0]
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# else:
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# value = self.master.execute(slaveId, cst.READ_INPUT_REGISTERS, startAddress, 2)
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# if order == 'ABCD': # 大端模式
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# valueByte = ABCDToFloat(value)
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# elif order == 'DCBA': # 小端模式
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# valueByte = DCBAToFloat(value)
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# elif order == 'BADC':
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# valueByte = BADCToFloat(value)
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# elif order == 'CDAB':
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# valueByte = CDABToFloat(value)
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# return valueByte
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# except Exception as e:
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# return 'error'
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# def readCoils(self, slaveId, startAddress, varNums, order = 'ABCD'):
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# try:
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# value = self.master.execute(slaveId, cst.READ_COILS, startAddress, varNums)
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# return value[0]
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# except Exception as e:
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# return 'error'
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# def readInputCoils(self, slaveId, startAddress, varNums):
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# print(slaveId, startAddress, varNums)
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# try:
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# value = self.master.execute(slaveId, cst.READ_DISCRETE_INPUTS, startAddress, varNums)
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# return value[0]
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# except:
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# return 'error'
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#
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# print(cst.READ_HOLDING_REGISTERS, cst.READ_COILS, cst.WRITE_SINGLE_REGISTER, cst.WRITE_SINGLE_COIL)
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# self.master.execute(1, cst.WRITE_MULTIPLE_REGISTERS, 0, output_value=[1, 2, 3, 4, 5])
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# self.master.execute(1, cst.WRITE_MULTIPLE_REGISTERS, starting_address=5, output_value=[3.0], data_format='>f')
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# self.master.execute(1, cst.WRITE_MULTIPLE_REGISTERS, starting_address=6, output_value=[4.0], data_format='>f')
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# self.master.execute(2, cst.WRITE_SINGLE_COIL, 2, output_value=1)
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# self.master.execute(2, cst.WRITE_MULTIPLE_COILS, 0, output_value=[1, 1, 0, 1, 1, 0, 1, 1])
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# logger.info(master.execute(1, cst.READ_HOLDING_REGISTERS, 0, 2, data_format='f'))
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# Read and write floats
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# send some queries
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# logger.info(master.execute(1, cst.READ_HOLDING_REGISTERS, 100, 12))
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if __name__ == "__main__":
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tcpMaster = DPV1Master('192.168.3.10', 502)
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tcpMaster.searchSlave()
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# tcpMaster.readHoldingRegisters(1, 6, 2)
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# tcpMaster.master.execute(1, cst.WRITE_MULTIPLE_REGISTERS, starting_address=0, output_value=[1,2,3,4,5])
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#
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# master = modbus_tcp.TcpMaster(host="localhost", port=502)
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# values = [6]
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# master.execute(1, cst.WRITE_MULTIPLE_REGISTERS, starting_address=0, output_value=values)
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