Hi Dario, I suggest you use socket stream and more specifically the ZdcSocketStream class. Socket is too low level, and web socket is for communications over HTTP. Noury

On 17 Dec 2019, at 13:20, dario.trussardi65 <dario.trussardi65@gmail.com> wrote:

Ciao,

i have to manage bidirectional communications with a printing device.

For now from Pharo i open a TCP-IP connection on the device that acts as a server.

So from the program ( client ) i manage the synchronous transmission and reception

of the various commands to the device and everything is ok.

At this point it remains for me to manage - intercept on the client (Pharo)

the asynchronous transmission of commands by the server ( for example: the end of paper notification from the device )

How can i handle this?

At which level do you advise me to work? ( socket - socketStream - websocket - ....... ..... )

Any advice on this?

Thank,

Dario