Blink screen heartbeat based on ROS connection

[karmanyaahm]

PR Summary

PR Link: #44

Description

The heartbeat on the screen now only turns on when ROS is connected.

Reviewers

• Required: @maxx

• Optional: @melissa, @jake

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Changelog

• Serial informs global screen object when every time it receives a new message
• Screen class keeps track of the time of last message
• If there was a message within the last 1 second, blink heartbeat, else disable heartbeat

Reviewer Guide

See Changelog

Testing

Automatic

none

Manual

video

Documentation

none

Checklist

• Confirmed all tests pass on a clean build
• Added reviewers in Github
• Posted PR Summary to Discord PR's Channel
• Ran uncrustify on any modified C++ files
• Ran Colcon Lint for any modified CMakeLists.txt or Package.xml

[MaxxWilson]

LGTM

[maxx]

@MaxxWilson hey guys - i'm getting copied on all of your issues here for some reason. I'm not involved in the project obviously. would be nice to be removed so I don't need to email filter -- I have a lot of github alerts that I do need to see :)

[MaxxWilson]

@MaxxWilson hey guys - i'm getting copied on all of your issues here for some reason. I'm not involved in the project obviously. would be nice to be removed so I don't need to email filter -- I have a lot of github alerts that I do need to see :)

Oh my! I am so sorry about that. Will handle right now.