Împlement a Stop command

[vowill]

Thx @braindead1 for this great adapter!

So far the commands "0": "Auto", "1": "Manuell", "2": "Home", "98": "End of day" and "99": "Job" are implemented.

It would be great to have a further command "stop" to halt the mower instantaneously.

This feature is especially useful if the mower cannot go back to its charging station, e. g. due to heavy rain starting in a hilly landscape, or if the job is done in a 2nd area (with no charging station) where the mower has been placed manually.
PS: The robonect app is offering such a command.

Thank you in advance for sharing any ideas and comments on that proposal!