The RSSI just gives you a number for the signal strength. The signal strength depends on more parameters than just the distance. Obstacles like walls, windows etc., reflections, the location of the receiver/transmitter, if it's in a pocket, close to the skin, lying on a table, antenna design etc.. All in all this is just a matter of testing. Try and see if the RSSI values in an environment similar to where it's supposed to operate give you sufficient info to calculate the distance.
The RSSI just gives you a number for the signal strength. The signal strength depends on more parameters than just the distance. Obstacles like walls, windows etc., reflections, the location of the receiver/transmitter, if it's in a pocket, close to the skin, lying on a table, antenna design etc.. All in all this is just a matter of testing. Try and see if the RSSI values in an environment similar to where it's supposed to operate give you sufficient info to calculate the distance.
i keep my advertisement interval as 100ms and power transmission level as 0 DB. just consider that there no obstacles. i want to measure the how far my device from central with RSSI value
