Hello All, I am trying to communicate between 2 microcontrollers using 2 xbee shields.= I am trying to configure the Xbee shield with PAN ID, address etc. I am us= ing X-CTU utility on a windows 7 64 bit operating system. I am able to conf= igure one of the XBee modules with all the necessary parameters. I am not a= ble to repeat the same for the other module. I able to communicate to the Xbee shield for the first 20 seconds. During t= his 20 seconds, the light on the Xbee shield is ON. The xbee shield respond= s to the communication query test and the serial number is verified. I am n= ot able to repeat the query test after the light goes OFF. Is my XBEE shiel= d broken? Thanks, Sai --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .