예제 #1
0
        protected static double calculateDistance(int txPower, double rssi)
        {
            if (rssi == 0)
            {
                return(-1.0);                // if we cannot determine distance, return -1.
            }

            double ratio = rssi * 1.0 / txPower;

            if (ratio < 1.0)
            {
                return(Math.Pow(ratio, 10));
            }
            else
            {
                double accuracy = (0.89976) * Math.Pow(ratio, 7.7095) + 0.111;
                return(accuracy);
            }
        }