Add thread sleep after serial port opening

[gleniosp]

🦟 Bug fix

Fixes #288

Summary

By adding a sleep right after the serial port opening in the MotorDrive::Setup method, it eliminates the response timed out errors when talking to the MCU (in the Arduino board). This way, once the port is opened, the MCU has time to boot up and stabilize after the MCU reset caused by opening the serial port the first time. The sleep is also added before configuring the DTR setting for the port, otherwise it can trigger a 2nd reset while the MCU is still booting up from the first reset, causing timing issues later.

Then, possibly due to these timing issues, having the sleep applied only after calling the MotorDrive::Setup method as it is now in the Motor Demo App didn't properly work as well. Therefore, now that sleep is added right after the serial port is opened in MotorDrive::Setup, we can also remove the sleep from the Motor Demo App as it doesn't seem to be required anymore (no timeout errors were observed).

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[francocipollone]

Thanks for the contribution! Let me try it locally first and I will be glad to merge it :D

[gleniosp]

Thanks for the contribution! Let me try it locally first and I will be glad to merge it :D

Thanks, @francocipollone! Sounds good 🙂