Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * Convert RSSI to distance using the free space path loss equation. See <a
     * href="http://en.wikipedia.org/wiki/Free-space_path_loss">Free-space_path_loss</a>
     *
     * @param distanceInMeters distance in meters (m)
     * @param txPowerAtSource transmitted power (dBm) calibrated to 0 meter
     * @return the rssi (dBm) that would be measured at that distance
     */
    public static int rssiFromDistance(double distanceInMeters, int txPowerAtSource) {
        double pathLoss = 20 * Math.log10(distanceInMeters);
        return (int) (txPowerAtSource - pathLoss);
    }
}