OpenOPC for python3.6 enviroment
This porcedure is for OpenOPC functional test,set your localhost as OPC server.
MatrikonOPC Server for Simulation is recommended,you can download from here. Make sure these environment variables in your Windows box are set as shown:

OPC_CLASS=Matrikon.OPC.Automation;Graybox.OPC.DAWrapper;HSCOPC.Automation;RSI.OPCAutomation;OPC.Automation OPC_CLIENT=OpenOPC OPC_GATE_HOST=127.0.0.1
OPC_GATE_PORT=7766 OPC_HOST=localhost OPC_MODE=dcom OPC_SERVER=Hci.TPNServer;HwHsc.OPCServer;opc.deltav.1;AIM.OPC.1;Yokogawa.ExaopcDAEXQ.1;OSI.DA.1;OPC.PHDServerDA.1;Aspen.Infoplus21_DA``.1;National Instruments.OPCLabVIEW;RSLinx OPC Server;KEPware.KEPServerEx.V4;Matrikon.OPC.Simulation;Prosys.OPC.Simulation

Please download and install the following packages in order to develop your own Python programs.

1. Python 3.6+
   http://www.python.org/download/

2. Python for Windows Extensions (pywin32)
   You can do pip install through command line by running :pip install pywin32

3. Pyro4
   You can do pip install through command line by running :pip install pyro4

4. Clone or download the repository,extract the compressed file to a folder in your windows box (i.e.C:\OpenOPC36).

5. Change to lib folder,register the OPC automation wrapper(gbda_aut.dll) by running this in commmand line:
   C:\OpenOPC36\lib>regsvr32 gbda_aut.dll

6. Change to lib folder,copy python36.dll to your python installation folder if the dll is not existed,folder path as:
   Lib->site-packages->win32
i.e. C:\Users\Administrator\AppData\Local\Programs\Python\Python36\Lib\site-packages\win32

7. Change to src folder,copy OpenOPC.py to your python installation folder,folder path as: Lib->site-packages
i.e. C:\Users\Administrator\AppData\Local\Programs\Python\Python36\Lib\site-packages

8. Install OpenGatewayService

• Change to src foldre through command line
  i.e.``C:\OpenOPC36\src>

• Install OpenOPCService through command line
  python OpenOPCService.py install

• Wait while the following message is shown
  Installing service zzzOpenOPCService
Service installed

9. Start Open Gateway Service
   net start SERVICE through command line as below:
   C:\OpenOPC36\bin>net start zzzOpenOPCService

10. Functional test

• using the OpenOPC Gateway Service mode(both win32 platform and non-windows platform)

  client code as below:

  import OpenOPC
   def readopc():
       opchost = 'localhost'
       taglist = ['Random.Int1']
       opc = OpenOPC.open_client(host = opchost)
       opc.connect()
       while True:
           v = opc.read(taglist)
           for i in range(len(v)):
               (name, val, qual, time) = v[i]
               print('% -15s % -15s % -15s % -15s'% (name, val, qual, time))
   if __name__=='__main__':
       readopc()
  

• using DCOM mode(only win32 platform)

  client code as below：

    import OpenOPC
    opc = OpenOPC.client()
    opc.connect("Matrikon.OPC.Simulation.1")
    while True:
        data = opc.read('Random.Int1')[0]
        print(data)
  

11. The authors of this package are:
    Copyright (c) 2008-2012 by Barry Barnreiter ([email protected])
Copyright (c) 2014 by Anton D. Kachalov ([email protected])
Copyright (c) 2017 by José A. Maita ([email protected])
    For more details please check Mr.joseamaita's repository about OpenOPC here