Kevin,
The insufficient power to calibrate is a bug in either the Breeze firmware or the Breeze Cam app. It shows itself sometimes if the calibration is attempted while there is a connection to the internet via cellular data. The solution (work around) has been to place the phone/pad/tablet into airplane mode, enable WiFi, connect to the Breeze, and then perform the calibration.
There seems to be a lot of little quirks that get solved by placing the controlling device in airplane mode to disable the cellular connection. On the iOS side there is only one reason to need cellular data enabled while flying the Breeze, and that is being able to live feed to Facebook or YouTube. The Android version of Breeze Cam doesn’t offer the live feed. So placing the device in airplane mode while flying is actually advantageous, as it would prevent having your flight interrupted by a phone call or text message.