Do not proceed for not available switches

[marcinporebski]

My cover is controlled by switches for which they are sometimes not available. Never the less this plugin seems to ignore the fact that the switch is not available.

[clintongormley]

Unfortunately not, the integration is optimistic. There is no feedback from the switch back to the integration. What would happen if the switch was available at the start of the operation then disappeared during the operation? Ultimately we have to depend on reliable communication with the switch