Fair point. Looking at the recent events for the temp sensor device, the heartbeat is pretty random. At times its seconds apart, other times an hour could pass. I’m guessing its triggered by a change in temp\humidity as holding it in your hand immediately registers a change in the smartthings app.
The ST presence device is a bit pricey in my opinion, for something which may\may not do the job reliably. I’ve read through various posts discussing the presence sensors, and most issues seem to be around a lack of wired zigbee devices or repeaters (which i shouldn’t have a problem with) and\or battery life. I can understand that when the device is constantly pinging the hub its going to consume some power, but i cant justify having to replace the battery every few months.
I personally use the ST app to detect my presence, but i’m looking for a cheap, low maintenance device to give to the parents etc. From what I’ve read, short of using a smartphone, there aren’t really many options.