custom message from other host

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Hello everyone,

this is a small design question. I have a Rasberry PI that runs ros and gets everything from the sensors on the robot. It is all working great while sending standard messages, but I bumped into an issue with the custom ones.

Say, I want to send a string name of the button, a boolean of its state and a timestamp. I would need to define a new msg for this purpose. The question is: how can I include this message's header, when receiving this message on another machine?

Can I just create a message with the same parameters in the recipient package? I believe this cannot work, because the type will be different.

Any ideas are greatly appreciated.