Slow week, and I was cleaning up the bench. Stumbled on one of my Sparkfun Bluetooth Mates.
I used these with the metawatch a few years ago. I was never able to work out the pairing to get these to connect to the Pebble. Well, I know a bit more, and I'm probably even more persistent these days...
I need to work out how to send an application message, then I can go phoneless. I might have to use the Wixel again, could keep my parts count down. This will net me a larger carry, but no phone requirement for extended periods. Still need to get calibrations in somewhere, though.
This guy (here) was close. But he's leaving out the initial pairing step. The packets have changed since this was published also. Allot of strange details, probably bluetooth device dependent. I'll post more when I can sort through all the details, but I can reliably pair with the watch and send a notification to it.