# Inc.jet Printer communication problem
**URL:** https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376
**Category:** Industrial
**Created:** [27 May 2021 21:41 UTC](https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376 "2021-05-27T21:41:00Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@tree-frog](https://discourse.nodered.org/u/tree-frog)
#### Post date: [27 May 2021 21:41 UTC](https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376/1 "2021-05-27T21:41:00Z")
Dear Sirs:
I have an inc.jet printer that speaks only in a complex series of non-printable characters. I need to pass the printer on the TCP port a series of bytes. my initial tests are failing. I'm looking for a means to test the values going to the printer to see what is actually going out on TCP. Is there a tool which I can use to see the values posted on to the network?
My attmpts are getting a buffer back, but its an error message. not the response expected. So I think my message is buggered to the port.
I need a better tool to debug the comms.
Kind Regards,
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 May 2021 21:42 UTC](https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376/2 "2021-05-27T21:42:47Z")
> [@tree-frog](#):
>
> Is there a tool which I can use to see the values posted on to the network
Wireshark or tcpdump
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### Author:  [@tree-frog](https://discourse.nodered.org/u/tree-frog)
#### Post date: [28 May 2021 00:13 UTC](https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376/3 "2021-05-28T00:13:21Z")
I got Wireshark and i need to learn how to find the posting to the printer. It seems that there is a lot more and what I'm looking for is like finding a needle in a haystack.