Distance measure is more accurate walking away than walking towards a beacon

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1

I've been testing with these for a about a month. One thing that I notice is that when walking away from a beacon, the distances are fairly accurate, however, if I turn around and walk back towards a beacon, it takes roughly 3 times the time interval for the distance to catch up.

Test result: I had a helper walk away from my device with one of the Estimotes set at -4 power and 50ms. As he walked to a distance of 4 meters, the distance kept fairly good track. However, when he turned around and walked back in a period of 5 seconds to cover the 4 meters, the time it took the message to hit beaconManager:didRangeBeacons:inRegion: to about 3 times as long to catch up as walking away.

Is there anything like kCLLocationAccuracyBest that can be set?

2

There is not anything like kCLLocationAccuracyBest that can be set.

When you say that you turned around and walked back, do you mean that between beacon and phone there was a person? If so, this introduces quite big Bluetooth signal attenuation. Bluetooth is based on 2.4 GHz which is easily absorbed by water and humans are mainly water.