please help, xbs1 or xbs2 ??

hi everybody ,
this is the first time for me to use the xbee radios , and im confused between xbs1 and xbs2 which one is the best for me , coz my prject is somehow simple . it is to connect a water sensor to a microcontroller then to xb radio then this radio send to the other xb radio which is connected to pc to get the result of the sensor in real time . thats all

so which radio shall i use ??


Use of Radios (Xbee Series1 and Series2 modules) depends upon the network that you select.

XBee Series2 modules supports only Zigbee and ZNet networks.

Hope this helps.