Since I've migrated from screen to tmux years ago, I always felt that missed screen's excellent support for serial devices.
But recently I found github.com/tio/tio which was developed exactly with that use case in mind and I couldn't be happier. Such an amazing tool.
GitHub - tio/tio: A serial device I/O tool
A serial device I/O tool. Contribute to tio/tio development by creating an account on GitHub.GitHub