Those issues continue to require variables that can make the difference of the value of RSSI, reduced, that is, the value of RSSI values of tolerance which tolerances can be calculated from the difference between the value of RSSI arising from the calculation of the actual value of RSSI. These issues need to be approximated to be used as the value of the information by means of fitting Curve showed that the relationship between RSSI value to the distance from the access point, the Wi-Fi each has characteristics closest to the natural logarithm function. Then apply the calculation method to locate and tolerances that happens to use in creating programs for the specified position. Using the Eclipse SDK and ADT plugin, Software Tools for programming for such a program to run on the operating system Android Android version 4.4.2 kitkat and test on the smart phone brands, Asus Zenfone version 4.5 (A450CG), which shows the position of the person in the program looks like Figure 1.
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