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I'm looking to run screen

screen /dev/ttyS0 115200

and echo my commands locally. This is one of those rare phrases where google spits out a lot of irrelevant results.

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My mistake, I had an open screen session and didn't know how to reconnect to it, so I forced a new session by sudo screen and that session was extremely messed up (corrupt characters) and didn't echo 90% of the characters. I was able to reconnect to that session and all was well.

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