View single post by slychiu

Posted: Saturday Aug 19th, 2017 10:54 am

Joined:	Saturday Apr 29th, 2006
Location:	Singapore
Posts:	5498
Status:	Offline

Polling has always been a big problem in Zwave. Devices are not allowed to automatically give their status when it changes. The controller has to poll ie send a Get Status command to each device that it wants status. This means that in order to know the status of many devices, the controller must constantly poll each device as it would not know when its state would change. This is undesirable as it causes a lot of RF traffic and is discouraged by Zwave.

For a virtual node in UCM/Zwave, the controller also has to poll its status
Ian has mapped virtual nodes to Flags in Comfort. The Zone On response sets the flag and Zone Off response clears the flag. The Homeseer controller polls the virtual node to get the status of the flag ie zone

The new action code in the firmware sends a Status Update command from the virtual node to the controller node. Status Update is normally a reply to a Get Status command ie a Poll. The new action sends a status update without waiting for a poll. It appears this works for Homeseer but it is not known if other controllers will handle in the same way.

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