Keep retrying when connection to doorbell fails

[felipecrs]

Closes #223

[felipecrs]

@pergolafabio, I did not try it yet, but I think it should work.

[pergolafabio]

Hey, did a test agian addon was connected, rebooted my indoor device, and it came back online without the need of restarting the addon:

[pergolafabio]

i see error 7 , if the device is in an offline state, and you start the addon at that point

[pergolafabio]

i added beta 68 with your changed code, to handle error 7 can you install the beta 68 and test it?

[felipecrs]

It worked!

[pergolafabio]

perfect :-)