I look to be using version 2.0.0
From the log files I see:
017-05-11 00:19:46.739 [ERROR] [ing.zwave.handler.ZWaveSerialHandler] - Got I/O exception Input/output error in writeArray during sending. exiting thread.
2017-05-11 00:19:51.742 [ERROR] [ing.zwave.handler.ZWaveSerialHandler] - Got I/O exception Input/output error in writeArray during sending. exiting thread.
2017-05-11 00:19:51.742 [ERROR] [ocol.ZWaveController$ZWaveSendThread] - NODE 2: Timeout while sending message. Requeueing - 2 attempts left!
2017-05-11 00:19:51.742 [ERROR] [l.serialmessage.SendDataMessageClass] - NODE 2: Node is DEAD. Dropping message.
Appreciate any assistance. I still can control the switch via OH and via Alexa
Squid