Poll() and try()

Hi everybody,

Providing a driver has polling capability but isn't responding (poll() fails even using z-wave poller app), how does one get to detect this failure and try the response?

This would greatly help limit the amount of cmd requests on some devices and have my lighting cust apps detects devices that have become unresponsive or that simply don't update their status (like GE switches and dimmers for instance...)

Many thanks in advance.