I need to change the firmware of a Xbee3 to support 802.15.4. I have both:
https://www.sparkfun.com/products/13225
https://www.sparkfun.com/products/11812
But It seems that the usb board doesnt support changing firmware (since it doesn't have a DTR signal), and I can't find a computer with a RS232 D9 port (it seems they dont make them anymore). Is there any solution to changing the firmware of Xbee modules?