Periodically poll SwBuildId for IKEA, OSRAM and Philips

[manup]

Due OTA updates the version attribute may change.

[ebaauw]

Wouldn’t it be enough to be reading these on device announcement? From what I’ve seen, devices tend to reboot after firmware update.

What about the descriptors and the other Basic attributes? These tend to change on firmware updates as well.

[manup]

Good point, I guess after an update it makes sense to query all static attributes and descriptors again to be sure. For the new Device state machine that's rather easy, after certain events like update finished or device announce. For now I'd like to avoid bringing more complexity in the "old" code. The PR queries on an per hour basis, not optimal but hopefully shouldn't hurt, it also updates SwBuildId for devices which were OTA updated in the past but never queried automatically afterwards (like OSRAM and Philips).