bricked my XB24 after firmware update

aquaman

I tried updating the firmware from 10EC to 10ED and now my XB24 fails to communicate.
It was working fine just before I did this

I've searched the web on this and tried just about everything including hard resetting it
by pulling reset to ground, powering up with reset asserted, hot plugging it into my
usb adapter after I start a write operation, change baud rate, and asserting DTR, break and
deasserting RTS

When I try reading it, it complains about losing communication

Here's what I get in the X-CTU message pane when I try writing new firmware

Getting modem type....Programming modem...Detected baud rate difference.
Make sure PC and modem baud rate is set correctly
Lost communication with modem
Found bootloader active reprogramming firmware.
Write Parameters...Failed

I'm using the USB adapter that came with the Parallax starter kit if that
makes any difference.

Is it stuck in some sleep mode? how to get it out of sleep mode if that's
the case?

any ideas?

thanks



,

Duane Degn

Hopefully something in Tracy Allen's post about bricked XBees will help.

aquaman

thanks! yeah, tried Tracy's method and it fails the same way... There's some limited USB Rx activity in response to all of the Tx activity (red LED). So it appears the modem isn't completely dead.

Strange thing is, I just set it to 115.2Kbaud (instead of 9600baud) and clicked the 'no baud change' under the Modem Flash Update option in the PC Setting menu
and then tried writing again... This time the entire update worked and it appears functional again. The red LED out in front is blinking again

What's with the baud rate? I thought default was 9600???

I'm paranoid to update my other modems' firmware now :-(

Duane Degn

I don't know how the baud was changed.

Could you have used it with a program that changed the baud?

I'm glad you got it working again.

xanadu

That is strange. When I flashed the XBP24 10ED update I had to connect at 9600 and I normally use 57600. I never mix firmware updates with writing parameters because of this.