You should use a real ZigBee Module (from TI, Microchip ...) instead of that proprietary "zigbee".
My application is to have a mesh network of zigbee routers which can determine the position of several End Devices. These routers have to be able to determine the power (rssi)of End Devices data frames. With that power, a server will be able to calculate the position of End Devices.
That's my problem. I would like to have some Mobile End Devices that could communicate with several routers in order to have several power tape(rssi) for each End Devices. The servor will able to triangulate the position.
My boss told me to make that with Zigbee (xbee)but I'm afraid of Zigbee might be the bad choice for this kind of application... What's your opinion ?