You might be able to resolve the location from the IP on your service. I don't think the device has a GPS reciever.
The phone you use to set up the LaMetric device probably gets the location from its built-in location services, but I doubt the LaMetric cloud service would send that data along as part of the data request for security reasons. Perhaps they'll update their app model in the future to allow apps to request certain permissions (like location). For now you might be able to use the requesting IP against a GeoIP database in your own cloud service. That is assuming that update requests are made by the LaMetric device itself, and not by their cloud service.