If I recall correctly, the radio frequency used by motes is absorbed by water. Thus when a person moves between one mote and another the RSSI should drop a bit. Multipath could confuse things (maybe someone walks through another part of the room which the signal is bouncing through on it's way from one mote to another). It might work better work when the 2 motes are close to each other (the rssi value is very high, it drops off quickly after a short distance. Your mileage may vary.
David. On Fri, Mar 28, 2008 at 8:09 PM, renjie huang <[EMAIL PROTECTED]> wrote: > I remember one team used RSSI to calculate how many people went through > during a competition. They got very good result. Maybe they added certain > algorithm. > > > > > On Thu, Mar 27, 2008 at 4:07 PM, Matthew Melucci <[EMAIL PROTECTED]> > wrote: > > > Hi, I am working with mica2 and MTS300 sensor boards. I am doing a > > project for school to track the amount of people who enter through one > > doorway and exit through another. So I do not need to determine if the > > person is entering or exiting through that door. My problem is I was > > going to use the light sensing to do this but I am worrying it will be > > too complicated to determine because I have been playing with the > > sensors and the readings jump around too much. Another issue I have is > > not understanding which applications do what. I know that the boards > > are supposed to sense temperature and other things but all I have been > > able to do is get the blink working and the light sensing. Is there a > > better way or application to determine if someone walked by? Thanks > > for any responses. > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > > > > -- > Renjie Huang > Sensorweb Research Laboratory > http://sensorweb.vancouver.wsu.edu/ > Washington State University > _______________________________________________ > 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
