I have been measuring RSSI values on Mica2s. There does not seem to be any significant change in RSSI values when the mote separation changes by 1m. Noticeable changes seem to happen only once every 5 meters.
-Regards, Shankar. On Mon, Apr 14, 2008 at 4:55 PM, Ittipong Khemapech < [EMAIL PROTECTED]> wrote: > Nothing seems wrong with your results. I have sort of similar results. > > Ittipong > > On 14/04/2008, Eli Gotesman <[EMAIL PROTECTED]> wrote: > > > Hi, > > > > I made the following experiment: > > I've placed one sensor each 0.5m for 20m, and there is one sensor that > > sends 1000 messages to everyone. > > After the sending stage, each sensor has 1000 samples of RSSI values, > > and I compute the mean value for each distance (each 0.5). > > My problem is that there are some distances that their mean values of > > RSSI are too close, > > but maybe it suppose to be this way... > > > > > > > > On Sun, Apr 13, 2008 at 7:09 AM, Ittipong Khemapech < > > [EMAIL PROTECTED]> wrote: > > > > > In my opinion, the RSSI readings are quite susceptible to various > > > environmental conditions. Conducting more runs may help. > > > > > > How many runs per distance have you done? > > > > > > I think you may compute the median and compared it to the average. > > > > > > Ittipong > > > > > > On 13/04/2008, Eli Gotesman <[EMAIL PROTECTED]> wrote: > > > > > > > Hi, > > > > > > > > I'm working on an application that implements a localization > > > > algorithm that uses RSSI values to determine the distance. > > > > I did a little experiment to see the average value of RSSI for > > > > different distances, and the resolution of the average values that I got > > > > isn't good enough for me. > > > > Is there a way to get a more accurate value of a RSSI reading (maybe > > > > a way to get a double and not an integer...) > > > > > > > > Thanks, > > > > Eli > > > > > > > > _______________________________________________ > > > > Tinyos-help mailing list > > > > [email protected] > > > > > > > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > > > > > > > > > > > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
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