Indoor location using 802.15.4 – ZigBee
The Wireless Sensor Network Research Group (WSNRG) has created a small device called X-Tick to help researchers who are involved in the indoor location field to develop their own triangulation algorithms. It can be programmed to send messages with different power levels periodically or when moving its internal Joystick (events oriented). SquidBee motes can be used to retrieve these packets and to see the Received Signal Strength Indicator (RSSI) they have. You can read the related article here.
