( documentation citation) for RFC 2217 client : To be a windows client you have to install com0com virtual comport driver and hub4com (provided as 2 separate files).Ĭreate a PAIR of virtual comports where one is used for RFC2217 and the other is the port for your application will use. It will listen TCP/IP port 7000 for incaming connections and redirect them to COM1 port. Start the com2tcp-rfc2217.bat on COM1 port. Through the network by the RFC 2217 'Telnet Com Port Control Option' protocol: You have a server computer with phisical COM1 port and you'd like to share it It actually consists of two parts a HUB (hub4com) and kernel-mode virtual serial port driver (com0com) - explained further.Ĭonfiguration (I just cite the documentation): There is an absolutely brilliant free opensoure solution that can be used for comport forwarding, client and server for windows. More over you can multiplex the com ports and encrypt the data. Both would use completely different software, but because of RFC2217 standard they 'know' how to communicate. This allows one to run linux server and windows client. It allows you to run the server and the client on linux or windows machines (and MACs I suppose, but haven't tested it). There are a lot of software that supports telnet+RFC2217 serial port forwarding. One of the solutions is using telnet with RFC2217 - Telnet Com Port Control Option. So now the application just works with serial port on the client machine, and doesn't even know that data is actually transmitted over the network. Virtual comport that mimics physical serial port and interface with the APP.SERVER that communicates with the DEVICE through physical serial port and then serves the data over network.So the diagram is: +-+ comport +-+ network +-+ virtual comport +-+ It is called 'virtual serial port' or 'virtual comport' as this is a software emulated bridge between a client and your application. Since the application (APP on diagrams) knows only how to communicate with the device by serial port (we suppose), the client machine has to have some virtual serial port that is used by the application.

Real life example: a device is connected to raspberry pi (very small single-board machine) that is connected to a local network, and read the data on a desktop.

Now what we want, is to have the device connected to one machine (server), and run the application on the remote machine (client) over the network. Suppose we have an application that works with some device using serial port (com port or comport - the same thing). You can read abut it in the Wiki article ) (Serial port or com port? - Serial ports are often refered as COM ports. Connecting to serial port (com port) over network

Mac serial port emulator