TCP Questions

Hi, I’m having trouble sending TCP data to a custom device, the string is pretty straight forward (27bytes) but when I wire-shark the data being sent there are are whole load of other characters. Can anyone tell me what these characters are and why and if the TCP node is adding in this extra?

Heres is a screenshot of me sending the ASCII message HELLO

How do i get rid of all of these other characters?

Any pointers would be good!


Maybe that was too early to post a question. Wireshark displays all the Packet header info aswell.