I’m using X-CTU to configure a pair of XBee 2.5 Pro radio devices.
Trying to read the firmware from X-CTU always fails because it reports that firmware is not in the database. I’ve updated the firmware database but the result is the same.
When I test the connection (from PC settings tab) it reports all data OK.
Also, if I set the modem type, function set and parameters manually I can flash the chip correctly, I after that I can use it normally.
AMAIK, Xbee has a through hole baud rate in the serial receiver. Once I accidentally misuploaded a wrong firmware, it was supposed to be 26A0 or 27A0, it became a module that receives updates only by remote and shuts the serial ports. Then I send it to the support but they updated a firmware just by some baud rate of direct serial communication. So, AMAIK, in some case, it receives updates but doesn’t transmit from the serial port.