Async Client Error with Async Server Example

[William Fitzgerald]

Hi All,

If I run the Async Client [1] and the Async Updating Server[2] from the PyModbus examples I get an error:

Server shows:
DEBUG:pymodbus.server.async:Client Disconnected: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.]

Client shows:
DEBUG:pymodbus.client.async:Client disconnected from modbus server: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly.]

Any ideas on what has happened?

Note, on the client side I modified 1 line to match the server port of 5020 instead of 502

defer = protocol.ClientCreator(reactor, ModbusClientProtocol
        ).connectTCP("localhost", 5020)

[1] https://pymodbus.readthedocs.org/en/latest/examples/asynchronous-client.html
[2] https://pymodbus.readthedocs.org/en/latest/examples/updating-server.html

[Sarmad Yousif]

Hello William,

I'm currently facing the same problem? Were you able to get a solution for this ?

[Sarmad Yousif]

after looking into it, I found that this is not an error, it just means that the connection has just finished after executing the code. this example is not a looping code, it just writes the value to the server and read it back. this operation is being executed only once.