If you want something a bit different, you could try SensorPush. Not Zigbee or Z-Wave, these sensors communicate via bluetooth with an app on your phone or with a gateway that allows remote monitoring and sensor readings to be stored in the cloud. They store close to a months worth of readings on the sensor itself, these readings then sync with your phone when you are in range and / or get uploaded to their cloud storage if using the gateway.
Battery life is about two years, and I can back that up myself, perhaps even longer, but a CR2477 isn't cheap. Neither are the sensors or the gateway...
They seem to have expanded the range since I bought mine, they now include pressure and other conditions, as well as waterproof versions.
I like the idea, like my Hue lights, that this is both self-contained system, but also something I have been able to integrate with my HE hub, though sadly using the cloud. I wrote a driver that downloads the current readings from the cloud periodically to a virtual device on my HE hub. These readings then get pumped out to InfluxDB / Grafana for charting. I plan to eventually sync any readings from the cloud that are missed, but have not started work on that yet.
Simon
