How to have reliable, fast and continous communication between two arduinos using serial

You have NEVER addressed the reliability question of your thread. How do want to ensure reliability?

Im sorry, I am not a proffeaional embedded programer or robot builder. I am just asking for project guidance and had some thoughts when I wrote the post.

My idea with reliability was that I will have a good radio communication so the connection isnt lost. My idea was to have the secondary arduino to do some kind of proccess if the connection was lost but I didnt think it thorugh all the way.

Im just here to leadn and have fun, but everyone seems so toxic. This is just my hobby side project.

You can have good radio connection, but corrupted data if you don't have a way to verify it and correct it.

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