How to see data packet (UDP packet) coming from IEEE802.15.4 sensor?

[Mms Utm <mms_utm () yahoo com>]

Hi Everyone...
I am a newbie to this
 forum..I just sign-up   

My problem is...I have installed Wireshark 
software on Linux Fedora Core 10 for my assignment..
I have put my 
program inside the small IEEE802.15.4 data sensor. This sensor will 
route packets between sensors and finally it will reach the laptop via 
USB port version 2.0. So I want to use wireshark to see any upcoming 
data packets only from the sensors. 

But when I clicked 'Capture'
 and then 'any' tab it did not show up anything that comes from the 
sensors...all I get is only the Wi-Fi (internet)..I don't want internet 
packet..I only want my sensor data packets...

Please somebody 
help me..I have tried this and that but it never work...Urgent 
assignment..


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