Configure BLE Sensor for 1+year of battery life

[drzwave]

Sensor reading frequency can be as low as once/hour.
Desired rate is probably every 6 minutes - 10 times/hr. Doesn't overwhelm us with a lot of data with plenty of resolution. We don't need data every second.
Each reading uses a chunk of battery life. So the fewer readings, the longer the battery will live. Also have to make sure the Tag is in the lowest possible sleep state between readings.

The BLE sensor must advertise every few minutes and then return to sleep to keep power down so it will run on the coin cell for at least a few weeks, ideally close to a year.