Why the measuredPower property is NaN

I want to use the measuredPower property, but it is NaN. Why there is no value for the property?

Were you reading it from hardware beacon or virtual beacon iOS app

Additional question: How did you find the beacon? Which method have you used?

same thing here. trying to access a beacon's measured power returns (null)...
I tried to use:
[NSString stringWithFormat:@"Power: %@", [beacon measuredPower]];
trying to access measured power in this way returned the same value:
[NSString stringWithFormat:@"Power: %@", beacon.measuredPower];

Any suggestions?

See comment on ESTBeacon.h:

those properties are available when scanning beacons with startEstimoteBeaconsDiscoveryForRegion: method.

thank you!