I'm going to look deeper, but ISOBlue's specs indicate their devices are only precise to 2 to 3 meters; I'm going for the sub-foot (12" - 0.3 meter) range of precision.
Is to detect current going to the speaker (probably with a relay or SCR or somesuch) of a standard smoke alarm, and then the FIDO could send a notice out. You just have to get the voltage levels right :-)
Finally got a custom built kernel to boot off the SD card. Its a bit awkward due to all the ssh dancing and IP address changing, but it appears to work.
So, I now have a working and (I hope) stable development system. Time to take a baseline backup and start work on the device driver changes. Also have to get the debugging environment set up.
I've assembled and tested the BeagleBone Blacks, and soldered together the XBee and GPS units for each of three base stations.
The next step (and a rather big one at that) is to download all the kernel sources and find the serial device driver so I can modify it to perform very high resolution timing. Then I have to build and test, and repeat until I get it right.
Comments
Followup?
Thanks...
One interface possibility...
Just got first custom kernel to boot.
Completed soldering of base station peripherals