This test consisted of separating the motes by 5 different distances and getting the LQI and RSSI values. We did this to see if one or the other has more consistent and relative results. Also, this test was to check the sensitivity of LQI because some articles say that for the distances we are dealing with the RSSI value will provide the proper resolution/sensitivity. Because only 5 distances were tested there are only 5 data points (the averages) on each plot. This low resolution makes the plots look bad there is an interesting trend of both the RSSI and LQI dropping in the middle of the range and higher at both ends. The expected line would be increasing as the motes get closer to each other, but every orientation showed that around 1 meter both quality indicators dipped a little. Well onto the plots…
The first two plots are of the averages and standard deviations with an orientation of the two motes vertical with the usbs pointing up, battery packs facing away and a height off the ground of 40 inches.
A link to the data is included here http://spreadsheets.google.com/ccc?key=0AoolpjQMTdWpdFVoWnBQX0RJQXF6cmxseU95Z2ZMY3c&hl=en
The next two plots are the averages and standard deviations with an orientation of the two motes lying horizontally on the ground with the usbs facing each other
A link to this data is included here http://spreadsheets.google.com/ccc?key=0AoolpjQMTdWpdHU4dzRUaWpnVm9CTGh2c2hieEZMN3c&hl=en
The next two plots are with the orientation such that the motes were horizontal on the ground with the usbs facing away from each other
A link to this data is included here http://spreadsheets.google.com/ccc?key=0AoolpjQMTdWpdFNMSTlrUHlSdEo5Wkd4c0VJeXkyNFE&hl=en