Do not change to printing states if disconnected
Summary:
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>
Do not send serial commands if serial isn't open
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>
Reviewers: rizzitello, tcanabrava, laysrodrigues
Reviewed By: rizzitello
Differential Revision: https://phabricator.kde.org/D9007