Thanks for the suggestion. You are correct the default wakeup is 8 hours. It was about 3 hrs after initial pairing that it finally worked.
To put in wakeup mode — I held the button down for 5 sec until the LED turns yellow which is supposed to put it in wake-up mode for 5 minutes. Did that a couple of times to no obvious avail, so perhaps something else triggered the parameter update. Regardless, it eventually worked. I have a couple more to pair, so if I find the magic trick I will report back. I am still learning exactly how to finesse Vera to pair devices.
(update: just added a couple more sensor devices and they worked immediately. So not sure what the issues was yesterday, but all is good.)
Even though this device is one of the devices listed in add-device section, you still have to add the settings for parameter 4 (1 byteDec, value=1).
A couple comments on the sensor itself. I really like the range and sensitivity levels that are its default settings. It also seems to be pretty fast (<1 sec) in sending an alert thru Vera to my phone. The temperature and LUX readings are accurate and one can turn reporting of these sensor values off to conserve battery. So the sensor itself is very nice.