ray, 'marunio' over at wxforum figured out that the baud rate on the wmr89 is non-standard. that is why no one has been able to make any sense of the comms.
now that we know the baud rate (128000) it should be pretty easy to make a weewx driver for the wmr89. it looks like the communications protocol is similar to those of other wmr stations. if you could do some usb captures at the 128000 baud rate, that would help to cover the corner cases. m
