The connectivity maps you draw for MoteLab look cool. Can I get access to the raw data used to create the graphics?
Yes. Periodically we run a small experiment that aims to record an aggregate connectivity level between each pair of nodes on MoteLab. The experiment runs for as long as an hour and as briefly as five minutes, depending on system availability. The way that this is done is we cycle through the network one node at a time and have it send a packet. Nodes that receive the packet record that fact and the RSSI level associated with the reception. Choosing one node at a time minimizes the internal interference since no other nodes should be transmitting, however other sources of interference typical to an indoor office environment (802.11 traffic, monitor radiation, etc.) are present at levels that vary throughout the day. All data from each connectivity experiment is logged and can be retrieved by MoteLab users through the database instance running on motelab.eecs.harvard.edu. Account holders have access to this database, and read-only access to the table auth.connectivity, which holds the r
