I’m facing the same problem as the original poster. I have a number of Q2686H modules with 6.63 firmware (663_09gg.Q2686H 1955080 080207 16:01) and am unable to upgrade them.
By now I ahve installed each of the old SDK / IDE versions available on archive.sierrawireless.com and I’ve tried to install each and every firmware version that I could find, both using +WDWL / xmodem method, as well as with DWLwin.
The bootloader version on all those units is v06.0B
On one of the modules I have been able to update the DWL bootloader to version “V8port” using dwl_port.dwl from a “R71 Upgrade with Xmodem.zip”. The only result is that now the new loader is not able to reliably speak Xmodem anymore.
I’d really appreciate any help on this, as I’ve already wasted more than one entire day with this version incompatibility nightmare
And before you’re asking: I have hardware flow control wired on my board, and I’m able to pull the BOOT pin high. Also, I’ve tried
two different computer and three different USB serial converters (PL2303, CP210x, FTDI) and two different Operating systems (XP, Linux).