This shouldn't be hard to do. I have an Garmin Edge 1030 and a connected Garmin ANT+ Cadence Sensor. It takes 30 seconds or so for the Edge device to get a Battery = OK status at the device level on a newly connected cadence sensor.
But my simple CIQ data field continues to report NULL for the Battery Status (on a real device with a connected cadence sensor reporting Battery = OK to the device). There are no samples in the SDK that use AntPlus. I've implemented examples here in the Forum. No joy.
Here is my code. Straight forward. I must be missing something very basic and obvious to someone skilled in the art of sensors :-)