Got two XBee modules. One on a PC w/ X-CTU. Other with just VCC/Grd. The X-CTU seems to work great. I can query the remote unit to get its Hi/Lo address (atnd). But when I do a range test and try to set atci12 it returns ‘error’. Any ideas? Thx …

Hi. I have exactly the same issue.
I have a usb module and a rs232 module.

do I need to looback physically the rs 232 ?

also I have noticed that when I swithc the Zigee modem, the light always on the rs232 side;, not on the usb .